Hi,

We are working on a new project and want to connect two 5v hall sensor potentiometers to one DC brushless motor so they can be operated from different positions on the machine. Can they be connected in parallel, if so what if they were both operated simultaneously by mistake, would it damage the control circuit ?

Thanks

 

Welcome to AAC.
The effect of the two pots would depend on their design and on the design of the control circuit.
Please post the pot specifications and a schematic of the control circuit.

 

This is the only circuit information I have at the moment. Does it help ?

 

The Hall sensor speed controller is 5v with Black Green and Red wires.

 

The logic of this idea makes no sense to me.

"operated from different positions on the machine"

These pots create analog output signals, if one is set to max and the other to min- what do you expect to happen?

They fight, and nobody wins.

 

The logic of this idea makes no sense to me.

"operated from different positions on the machine"

These pots create analog output signals, if one is set to max and the other to min- what do you expect to happen?

They fight, and nobody wins.

Would it damage the circuit though ?

 

From post #3, it seems the control circuit is expecting logic signals plus a 5V PWM pulse input. I don't see how analogue Hall sensor pots could be directly connected to that.

 

IF the sensors are providing a variable resistance function and the two outputs are connected in parallel, the result would not damage the controller they were connected to, but it might damage the hall effect devices themselves. And no matter what, the results would be a bit unpredictable.
To have a speed adjustment control function from different locations could be achieved by adding a remote selector control function relay, such that an operator could take command from either position. But probably that is unsafe.
The solution could be a single remote operated potentiometer equivalent with digital inputs to request "faster" or "slower" in small increments, ifthe other control position has released control.

 

IF the sensors are providing a variable resistance function and the two outputs are connected in parallel, the result would not damage the controller they were connected to, but it might damage the hall effect devices themselves. And no matter what, the results would be a bit unpredictable.
To have a speed adjustment control function from different locations could be achieved by adding a remote selector control function relay, such that an operator could take command from either position. But probably that is unsafe.
The solution could be a single remote operated potentiometer equivalent with digital inputs to request "faster" or "slower" in small increments, ifthe other control position has released control.

Thanks for the advice, the machine is only small so no issue with two operators. One hall switch would be a food pedal and the other a hand throttle. I may opt for the selectable switch between the two. I am not sure if all three wires would need switching or just one or two of the 3.

 

What are the details/models of the Hall sensors? Model No's you intend to use.
Normally potentiometers cannot be paralleled.