Hi!
I require your help regarding a problem I’m encountering.
Description: I have an Remote controlled robot which has a motor (not drive motor) that need some speed control. Motor controller has 3 speed control wires measured as 5V, GND, Signal. I’m able to control speed from a manual speed controller but I have no way of remotely controlling the speed from RC transmitter/receiver.
Hardware concerned: DC motor, manual speed controller, RC receiver
Software concerned: N/A
Troubleshooting steps already taken: I’m thinking I can attach a 10k potentiometer to the 3 speed control wires and turn that potentiometer with a servo connected to the RC receiver. Is there a better way to do this because this requires me to make a jig where servo is connected to potentiometer.
Additional information:
Thank you so much in advance for your help!
Hello @gmoney18!
Are you trying to control a DC motor or a Servo?
Which motor controller are you using?
I’m thinking I can attach a 10k potentiometer to the 3 speed control wires and turn that potentiometer with a servo connected to the RC receiver.
Could you further explain this idea? Maybe make a sketch?
If you are looking to control the speed of a DC motor wirelessly it would be best to use an R/C DC Controller.
Regards
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What I need is to get a 0-5V linear DC voltage from an RC PWM signal which is 1000-2000us.
The throttle of the motor produces 0-5V DC voltage to control the speed of the motor. I need to do that from an RC controller but that is not possible without some kind of circuit.
What I was suggesting before is I fix a servo to the throttle and be able to control the motor speed and move the servo using RC to change the throttle.
Its hard to find higher voltage (48V+) brushless DC motors controllers that are RC enabled. Even if you find one, it is god awful expensive so that is out of my budget. So I’m trying to use my analog brushless DC motor controller and trying to implement throttle control from RC.
Oh, I see. You need BLDC motor controller. In that case, this could be a good option:
However, if that’s over your budget that’s understandable. Your idea sounds good, you should give it a try! 
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