How to install a wired sensor in a rotating bin without tangling the wires?

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP











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5
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Rotatable Composting bin



I want to insert couple of moisture, temp and humidity sensors in this bin to take readings from the compost.



But how do i install it without turning/tangling the wires?



Can anyone help me figure a solution I am not an engineer but I am trying hard to solve.







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  • 1




    Have you considered the proposals at How do I power/wire something that is rotating constantly? ?
    – David Cary
    Aug 25 at 2:07














up vote
5
down vote

favorite












Rotatable Composting bin



I want to insert couple of moisture, temp and humidity sensors in this bin to take readings from the compost.



But how do i install it without turning/tangling the wires?



Can anyone help me figure a solution I am not an engineer but I am trying hard to solve.







share|improve this question


















  • 1




    Have you considered the proposals at How do I power/wire something that is rotating constantly? ?
    – David Cary
    Aug 25 at 2:07












up vote
5
down vote

favorite









up vote
5
down vote

favorite











Rotatable Composting bin



I want to insert couple of moisture, temp and humidity sensors in this bin to take readings from the compost.



But how do i install it without turning/tangling the wires?



Can anyone help me figure a solution I am not an engineer but I am trying hard to solve.







share|improve this question














Rotatable Composting bin



I want to insert couple of moisture, temp and humidity sensors in this bin to take readings from the compost.



But how do i install it without turning/tangling the wires?



Can anyone help me figure a solution I am not an engineer but I am trying hard to solve.









share|improve this question













share|improve this question




share|improve this question








edited Aug 24 at 22:44









Wasabi♦

8,86652045




8,86652045










asked Aug 24 at 21:50









Vrushabh Chotalia

261




261







  • 1




    Have you considered the proposals at How do I power/wire something that is rotating constantly? ?
    – David Cary
    Aug 25 at 2:07












  • 1




    Have you considered the proposals at How do I power/wire something that is rotating constantly? ?
    – David Cary
    Aug 25 at 2:07







1




1




Have you considered the proposals at How do I power/wire something that is rotating constantly? ?
– David Cary
Aug 25 at 2:07




Have you considered the proposals at How do I power/wire something that is rotating constantly? ?
– David Cary
Aug 25 at 2:07










8 Answers
8






active

oldest

votes

















up vote
2
down vote













Put a disc on the side of the drum centered around the shaft it rotates on and have two, three or four concentric copper tracks for carbon brushes to rub on, spring loaded and they should work fine.






share|improve this answer



























    up vote
    2
    down vote













    There is a device called a slip ring which does what @Solar Mike describes. They can be fairly cheap if obtained on the surplus market or even purchased new from here or here. They can be either hollow or solid shafts. Solid shaft models can be used as part of the axle (if mechanically strong enough) while the axle can pass through the middle of the hollow shaft varieties.






    share|improve this answer



























      up vote
      1
      down vote













      Slip rings are a straightforward solution to the problem, so long as the electrical noise they generate is small compared with the signals you want to measure.



      Since you are already using an Arduino, you might consider an alternative, which is to have a second, battery powered, Arduino attached to the rotating drum itself, and use that to transmit the data to an external computer wirelessly, for example using a Bluetooth data link.



      I'm assuming the composting bin only rotates slowly, to mix up the contents, so there would not be any mechanical problems with a relatively large unbalanced mass (i.e. the Arduino) attached to it. But this "rotating transmitter" concept is used successfully in situations where the environmental conditions are very hostile (e.g. rotational speeds of the order of 10,000 RPM, high temperatures, and a corrosive atmosphere which would quickly destroy slip rings) - using purpose-built transmitters though, not an off-the-shelf Arduino.






      share|improve this answer



























        up vote
        0
        down vote













        This clothes dryer has conducting bands around the drum with wire brushes (#16 in diagram) "in order to transfer the inputs from the sensors in the baffles to the control board".






        share|improve this answer



























          up vote
          0
          down vote













          Commutating slip rings will work but another option is to use a slew ring for the main bearing of the drum:



          enter image description here



          The sensor wires and mounting can then extend to outside of the bin and not therefore not have to rotate at all... (there is no shaft in the way)



          The other end can be a traditional shaft and bearing if required.



          They're expensive new (but so can be slip-rings) - suggest you look at surplus/old spare stock on ebay etc.






          share|improve this answer



























            up vote
            0
            down vote













            Additional to the slip rings solution, you can easily find wireless sensors on the market. Which I personally find much more easy to implement.






            share|improve this answer
















            • 1




              Any links to such sensors? You would need to power them, which means either a battery, some kind of pendulum driven generator (think self-winding watches) or power leads from an external source...
              – BobT
              Aug 25 at 19:38










            • It's a normal humidity and temperature sensors for arduino I believe the module number is dht-11
              – Vrushabh Chotalia
              Aug 25 at 23:14










            • @BobT There are several vendors, you can look at the catalogs of MicroStrain or Omega. They are battery powered (rechargeable), which lasting time is usually dependent on the sampling rate,
              – user3408085
              Aug 27 at 12:58










            • @VrushabhChotalia You may want to look at the UWRH-2 model by omega.com.
              – user3408085
              Aug 27 at 13:00

















            up vote
            0
            down vote













            A rotary transformer https://en.m.wikipedia.org/wiki/Rotary_transformer could be an option. You may use one channel to take some AC power supply to the moving side, and conversely one or more channels to bring back some kind of serial data. Some simple electronics should be installed in the rotating part to condition power supply and communications. Rotary transformer itself could probably be a relatively low specs one and hence could be a home made one.






            share|improve this answer



























              up vote
              0
              down vote













              I suggest having a fixed shaft, with two bearing where it carries the drum. The drum can be driven from the outside with a roller, belt or similar. That way you don't need so many slip rings and no wireless connections.






              share|improve this answer




















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                8 Answers
                8






                active

                oldest

                votes








                8 Answers
                8






                active

                oldest

                votes









                active

                oldest

                votes






                active

                oldest

                votes








                up vote
                2
                down vote













                Put a disc on the side of the drum centered around the shaft it rotates on and have two, three or four concentric copper tracks for carbon brushes to rub on, spring loaded and they should work fine.






                share|improve this answer
























                  up vote
                  2
                  down vote













                  Put a disc on the side of the drum centered around the shaft it rotates on and have two, three or four concentric copper tracks for carbon brushes to rub on, spring loaded and they should work fine.






                  share|improve this answer






















                    up vote
                    2
                    down vote










                    up vote
                    2
                    down vote









                    Put a disc on the side of the drum centered around the shaft it rotates on and have two, three or four concentric copper tracks for carbon brushes to rub on, spring loaded and they should work fine.






                    share|improve this answer












                    Put a disc on the side of the drum centered around the shaft it rotates on and have two, three or four concentric copper tracks for carbon brushes to rub on, spring loaded and they should work fine.







                    share|improve this answer












                    share|improve this answer



                    share|improve this answer










                    answered Aug 24 at 22:06









                    Solar Mike

                    4,4191613




                    4,4191613




















                        up vote
                        2
                        down vote













                        There is a device called a slip ring which does what @Solar Mike describes. They can be fairly cheap if obtained on the surplus market or even purchased new from here or here. They can be either hollow or solid shafts. Solid shaft models can be used as part of the axle (if mechanically strong enough) while the axle can pass through the middle of the hollow shaft varieties.






                        share|improve this answer
























                          up vote
                          2
                          down vote













                          There is a device called a slip ring which does what @Solar Mike describes. They can be fairly cheap if obtained on the surplus market or even purchased new from here or here. They can be either hollow or solid shafts. Solid shaft models can be used as part of the axle (if mechanically strong enough) while the axle can pass through the middle of the hollow shaft varieties.






                          share|improve this answer






















                            up vote
                            2
                            down vote










                            up vote
                            2
                            down vote









                            There is a device called a slip ring which does what @Solar Mike describes. They can be fairly cheap if obtained on the surplus market or even purchased new from here or here. They can be either hollow or solid shafts. Solid shaft models can be used as part of the axle (if mechanically strong enough) while the axle can pass through the middle of the hollow shaft varieties.






                            share|improve this answer












                            There is a device called a slip ring which does what @Solar Mike describes. They can be fairly cheap if obtained on the surplus market or even purchased new from here or here. They can be either hollow or solid shafts. Solid shaft models can be used as part of the axle (if mechanically strong enough) while the axle can pass through the middle of the hollow shaft varieties.







                            share|improve this answer












                            share|improve this answer



                            share|improve this answer










                            answered Aug 24 at 23:15









                            BobT

                            1484




                            1484




















                                up vote
                                1
                                down vote













                                Slip rings are a straightforward solution to the problem, so long as the electrical noise they generate is small compared with the signals you want to measure.



                                Since you are already using an Arduino, you might consider an alternative, which is to have a second, battery powered, Arduino attached to the rotating drum itself, and use that to transmit the data to an external computer wirelessly, for example using a Bluetooth data link.



                                I'm assuming the composting bin only rotates slowly, to mix up the contents, so there would not be any mechanical problems with a relatively large unbalanced mass (i.e. the Arduino) attached to it. But this "rotating transmitter" concept is used successfully in situations where the environmental conditions are very hostile (e.g. rotational speeds of the order of 10,000 RPM, high temperatures, and a corrosive atmosphere which would quickly destroy slip rings) - using purpose-built transmitters though, not an off-the-shelf Arduino.






                                share|improve this answer
























                                  up vote
                                  1
                                  down vote













                                  Slip rings are a straightforward solution to the problem, so long as the electrical noise they generate is small compared with the signals you want to measure.



                                  Since you are already using an Arduino, you might consider an alternative, which is to have a second, battery powered, Arduino attached to the rotating drum itself, and use that to transmit the data to an external computer wirelessly, for example using a Bluetooth data link.



                                  I'm assuming the composting bin only rotates slowly, to mix up the contents, so there would not be any mechanical problems with a relatively large unbalanced mass (i.e. the Arduino) attached to it. But this "rotating transmitter" concept is used successfully in situations where the environmental conditions are very hostile (e.g. rotational speeds of the order of 10,000 RPM, high temperatures, and a corrosive atmosphere which would quickly destroy slip rings) - using purpose-built transmitters though, not an off-the-shelf Arduino.






                                  share|improve this answer






















                                    up vote
                                    1
                                    down vote










                                    up vote
                                    1
                                    down vote









                                    Slip rings are a straightforward solution to the problem, so long as the electrical noise they generate is small compared with the signals you want to measure.



                                    Since you are already using an Arduino, you might consider an alternative, which is to have a second, battery powered, Arduino attached to the rotating drum itself, and use that to transmit the data to an external computer wirelessly, for example using a Bluetooth data link.



                                    I'm assuming the composting bin only rotates slowly, to mix up the contents, so there would not be any mechanical problems with a relatively large unbalanced mass (i.e. the Arduino) attached to it. But this "rotating transmitter" concept is used successfully in situations where the environmental conditions are very hostile (e.g. rotational speeds of the order of 10,000 RPM, high temperatures, and a corrosive atmosphere which would quickly destroy slip rings) - using purpose-built transmitters though, not an off-the-shelf Arduino.






                                    share|improve this answer












                                    Slip rings are a straightforward solution to the problem, so long as the electrical noise they generate is small compared with the signals you want to measure.



                                    Since you are already using an Arduino, you might consider an alternative, which is to have a second, battery powered, Arduino attached to the rotating drum itself, and use that to transmit the data to an external computer wirelessly, for example using a Bluetooth data link.



                                    I'm assuming the composting bin only rotates slowly, to mix up the contents, so there would not be any mechanical problems with a relatively large unbalanced mass (i.e. the Arduino) attached to it. But this "rotating transmitter" concept is used successfully in situations where the environmental conditions are very hostile (e.g. rotational speeds of the order of 10,000 RPM, high temperatures, and a corrosive atmosphere which would quickly destroy slip rings) - using purpose-built transmitters though, not an off-the-shelf Arduino.







                                    share|improve this answer












                                    share|improve this answer



                                    share|improve this answer










                                    answered Aug 25 at 2:29









                                    alephzero

                                    6,1221518




                                    6,1221518




















                                        up vote
                                        0
                                        down vote













                                        This clothes dryer has conducting bands around the drum with wire brushes (#16 in diagram) "in order to transfer the inputs from the sensors in the baffles to the control board".






                                        share|improve this answer
























                                          up vote
                                          0
                                          down vote













                                          This clothes dryer has conducting bands around the drum with wire brushes (#16 in diagram) "in order to transfer the inputs from the sensors in the baffles to the control board".






                                          share|improve this answer






















                                            up vote
                                            0
                                            down vote










                                            up vote
                                            0
                                            down vote









                                            This clothes dryer has conducting bands around the drum with wire brushes (#16 in diagram) "in order to transfer the inputs from the sensors in the baffles to the control board".






                                            share|improve this answer












                                            This clothes dryer has conducting bands around the drum with wire brushes (#16 in diagram) "in order to transfer the inputs from the sensors in the baffles to the control board".







                                            share|improve this answer












                                            share|improve this answer



                                            share|improve this answer










                                            answered Aug 25 at 2:10









                                            Keith McClary

                                            101




                                            101




















                                                up vote
                                                0
                                                down vote













                                                Commutating slip rings will work but another option is to use a slew ring for the main bearing of the drum:



                                                enter image description here



                                                The sensor wires and mounting can then extend to outside of the bin and not therefore not have to rotate at all... (there is no shaft in the way)



                                                The other end can be a traditional shaft and bearing if required.



                                                They're expensive new (but so can be slip-rings) - suggest you look at surplus/old spare stock on ebay etc.






                                                share|improve this answer
























                                                  up vote
                                                  0
                                                  down vote













                                                  Commutating slip rings will work but another option is to use a slew ring for the main bearing of the drum:



                                                  enter image description here



                                                  The sensor wires and mounting can then extend to outside of the bin and not therefore not have to rotate at all... (there is no shaft in the way)



                                                  The other end can be a traditional shaft and bearing if required.



                                                  They're expensive new (but so can be slip-rings) - suggest you look at surplus/old spare stock on ebay etc.






                                                  share|improve this answer






















                                                    up vote
                                                    0
                                                    down vote










                                                    up vote
                                                    0
                                                    down vote









                                                    Commutating slip rings will work but another option is to use a slew ring for the main bearing of the drum:



                                                    enter image description here



                                                    The sensor wires and mounting can then extend to outside of the bin and not therefore not have to rotate at all... (there is no shaft in the way)



                                                    The other end can be a traditional shaft and bearing if required.



                                                    They're expensive new (but so can be slip-rings) - suggest you look at surplus/old spare stock on ebay etc.






                                                    share|improve this answer












                                                    Commutating slip rings will work but another option is to use a slew ring for the main bearing of the drum:



                                                    enter image description here



                                                    The sensor wires and mounting can then extend to outside of the bin and not therefore not have to rotate at all... (there is no shaft in the way)



                                                    The other end can be a traditional shaft and bearing if required.



                                                    They're expensive new (but so can be slip-rings) - suggest you look at surplus/old spare stock on ebay etc.







                                                    share|improve this answer












                                                    share|improve this answer



                                                    share|improve this answer










                                                    answered Aug 25 at 7:15









                                                    Lamar Latrell

                                                    1063




                                                    1063




















                                                        up vote
                                                        0
                                                        down vote













                                                        Additional to the slip rings solution, you can easily find wireless sensors on the market. Which I personally find much more easy to implement.






                                                        share|improve this answer
















                                                        • 1




                                                          Any links to such sensors? You would need to power them, which means either a battery, some kind of pendulum driven generator (think self-winding watches) or power leads from an external source...
                                                          – BobT
                                                          Aug 25 at 19:38










                                                        • It's a normal humidity and temperature sensors for arduino I believe the module number is dht-11
                                                          – Vrushabh Chotalia
                                                          Aug 25 at 23:14










                                                        • @BobT There are several vendors, you can look at the catalogs of MicroStrain or Omega. They are battery powered (rechargeable), which lasting time is usually dependent on the sampling rate,
                                                          – user3408085
                                                          Aug 27 at 12:58










                                                        • @VrushabhChotalia You may want to look at the UWRH-2 model by omega.com.
                                                          – user3408085
                                                          Aug 27 at 13:00














                                                        up vote
                                                        0
                                                        down vote













                                                        Additional to the slip rings solution, you can easily find wireless sensors on the market. Which I personally find much more easy to implement.






                                                        share|improve this answer
















                                                        • 1




                                                          Any links to such sensors? You would need to power them, which means either a battery, some kind of pendulum driven generator (think self-winding watches) or power leads from an external source...
                                                          – BobT
                                                          Aug 25 at 19:38










                                                        • It's a normal humidity and temperature sensors for arduino I believe the module number is dht-11
                                                          – Vrushabh Chotalia
                                                          Aug 25 at 23:14










                                                        • @BobT There are several vendors, you can look at the catalogs of MicroStrain or Omega. They are battery powered (rechargeable), which lasting time is usually dependent on the sampling rate,
                                                          – user3408085
                                                          Aug 27 at 12:58










                                                        • @VrushabhChotalia You may want to look at the UWRH-2 model by omega.com.
                                                          – user3408085
                                                          Aug 27 at 13:00












                                                        up vote
                                                        0
                                                        down vote










                                                        up vote
                                                        0
                                                        down vote









                                                        Additional to the slip rings solution, you can easily find wireless sensors on the market. Which I personally find much more easy to implement.






                                                        share|improve this answer












                                                        Additional to the slip rings solution, you can easily find wireless sensors on the market. Which I personally find much more easy to implement.







                                                        share|improve this answer












                                                        share|improve this answer



                                                        share|improve this answer










                                                        answered Aug 25 at 15:17









                                                        user3408085

                                                        395




                                                        395







                                                        • 1




                                                          Any links to such sensors? You would need to power them, which means either a battery, some kind of pendulum driven generator (think self-winding watches) or power leads from an external source...
                                                          – BobT
                                                          Aug 25 at 19:38










                                                        • It's a normal humidity and temperature sensors for arduino I believe the module number is dht-11
                                                          – Vrushabh Chotalia
                                                          Aug 25 at 23:14










                                                        • @BobT There are several vendors, you can look at the catalogs of MicroStrain or Omega. They are battery powered (rechargeable), which lasting time is usually dependent on the sampling rate,
                                                          – user3408085
                                                          Aug 27 at 12:58










                                                        • @VrushabhChotalia You may want to look at the UWRH-2 model by omega.com.
                                                          – user3408085
                                                          Aug 27 at 13:00












                                                        • 1




                                                          Any links to such sensors? You would need to power them, which means either a battery, some kind of pendulum driven generator (think self-winding watches) or power leads from an external source...
                                                          – BobT
                                                          Aug 25 at 19:38










                                                        • It's a normal humidity and temperature sensors for arduino I believe the module number is dht-11
                                                          – Vrushabh Chotalia
                                                          Aug 25 at 23:14










                                                        • @BobT There are several vendors, you can look at the catalogs of MicroStrain or Omega. They are battery powered (rechargeable), which lasting time is usually dependent on the sampling rate,
                                                          – user3408085
                                                          Aug 27 at 12:58










                                                        • @VrushabhChotalia You may want to look at the UWRH-2 model by omega.com.
                                                          – user3408085
                                                          Aug 27 at 13:00







                                                        1




                                                        1




                                                        Any links to such sensors? You would need to power them, which means either a battery, some kind of pendulum driven generator (think self-winding watches) or power leads from an external source...
                                                        – BobT
                                                        Aug 25 at 19:38




                                                        Any links to such sensors? You would need to power them, which means either a battery, some kind of pendulum driven generator (think self-winding watches) or power leads from an external source...
                                                        – BobT
                                                        Aug 25 at 19:38












                                                        It's a normal humidity and temperature sensors for arduino I believe the module number is dht-11
                                                        – Vrushabh Chotalia
                                                        Aug 25 at 23:14




                                                        It's a normal humidity and temperature sensors for arduino I believe the module number is dht-11
                                                        – Vrushabh Chotalia
                                                        Aug 25 at 23:14












                                                        @BobT There are several vendors, you can look at the catalogs of MicroStrain or Omega. They are battery powered (rechargeable), which lasting time is usually dependent on the sampling rate,
                                                        – user3408085
                                                        Aug 27 at 12:58




                                                        @BobT There are several vendors, you can look at the catalogs of MicroStrain or Omega. They are battery powered (rechargeable), which lasting time is usually dependent on the sampling rate,
                                                        – user3408085
                                                        Aug 27 at 12:58












                                                        @VrushabhChotalia You may want to look at the UWRH-2 model by omega.com.
                                                        – user3408085
                                                        Aug 27 at 13:00




                                                        @VrushabhChotalia You may want to look at the UWRH-2 model by omega.com.
                                                        – user3408085
                                                        Aug 27 at 13:00










                                                        up vote
                                                        0
                                                        down vote













                                                        A rotary transformer https://en.m.wikipedia.org/wiki/Rotary_transformer could be an option. You may use one channel to take some AC power supply to the moving side, and conversely one or more channels to bring back some kind of serial data. Some simple electronics should be installed in the rotating part to condition power supply and communications. Rotary transformer itself could probably be a relatively low specs one and hence could be a home made one.






                                                        share|improve this answer
























                                                          up vote
                                                          0
                                                          down vote













                                                          A rotary transformer https://en.m.wikipedia.org/wiki/Rotary_transformer could be an option. You may use one channel to take some AC power supply to the moving side, and conversely one or more channels to bring back some kind of serial data. Some simple electronics should be installed in the rotating part to condition power supply and communications. Rotary transformer itself could probably be a relatively low specs one and hence could be a home made one.






                                                          share|improve this answer






















                                                            up vote
                                                            0
                                                            down vote










                                                            up vote
                                                            0
                                                            down vote









                                                            A rotary transformer https://en.m.wikipedia.org/wiki/Rotary_transformer could be an option. You may use one channel to take some AC power supply to the moving side, and conversely one or more channels to bring back some kind of serial data. Some simple electronics should be installed in the rotating part to condition power supply and communications. Rotary transformer itself could probably be a relatively low specs one and hence could be a home made one.






                                                            share|improve this answer












                                                            A rotary transformer https://en.m.wikipedia.org/wiki/Rotary_transformer could be an option. You may use one channel to take some AC power supply to the moving side, and conversely one or more channels to bring back some kind of serial data. Some simple electronics should be installed in the rotating part to condition power supply and communications. Rotary transformer itself could probably be a relatively low specs one and hence could be a home made one.







                                                            share|improve this answer












                                                            share|improve this answer



                                                            share|improve this answer










                                                            answered Aug 26 at 12:40









                                                            carloc

                                                            101




                                                            101




















                                                                up vote
                                                                0
                                                                down vote













                                                                I suggest having a fixed shaft, with two bearing where it carries the drum. The drum can be driven from the outside with a roller, belt or similar. That way you don't need so many slip rings and no wireless connections.






                                                                share|improve this answer
























                                                                  up vote
                                                                  0
                                                                  down vote













                                                                  I suggest having a fixed shaft, with two bearing where it carries the drum. The drum can be driven from the outside with a roller, belt or similar. That way you don't need so many slip rings and no wireless connections.






                                                                  share|improve this answer






















                                                                    up vote
                                                                    0
                                                                    down vote










                                                                    up vote
                                                                    0
                                                                    down vote









                                                                    I suggest having a fixed shaft, with two bearing where it carries the drum. The drum can be driven from the outside with a roller, belt or similar. That way you don't need so many slip rings and no wireless connections.






                                                                    share|improve this answer












                                                                    I suggest having a fixed shaft, with two bearing where it carries the drum. The drum can be driven from the outside with a roller, belt or similar. That way you don't need so many slip rings and no wireless connections.







                                                                    share|improve this answer












                                                                    share|improve this answer



                                                                    share|improve this answer










                                                                    answered Aug 27 at 19:54









                                                                    mart

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