0

I've this PWM Module - 6V-90V 15A Pulse Width PWM DC Motor Speed Controller Switch which I use to control a peristaltic pump (ordinary DC motor), now I want to replace the potentiometer with an Arduino in order to create a soft-start for the pump by pressing a button. The control is a 0-5V input from the potentiometer, and the description says "you can external drive" and "It could use of PLC controls speed of motor", unfortunately I cannot provide datasheets or schematics.

Is it possible? Or I need a digital pot?

How should I wire it? The 3 cables from the board to the pot are: ground, 0-5V and 5V

Improve this question
1

Or you may exchange the whole controller with a power mosfet module connected to your arduino. And use pwm directly from your arduino. http://store.arduino.cc/product/T010020

Improve this answer
2
  • (Welcome on Arduino.StackExchange) The problem seems to be on the potentiometer. But you're right. (When you can, you should place such an enhancement as a comment, not an answer. But you'll need some more "points".) – Paul Mar 17 '16 at 10:10
  • Maybe add some more info to make it a non-link only answer, possibly a schematic? – RSM Mar 17 '16 at 13:17
0

Functionally you can replace the potmeter with a digital potmeter.
If your arduino runs on 5 volt, you can simply connect the grounds and the wire connected to the middle of the pot to a pwm pin. If the pwm pin does not work smoothly use a RC filter. That is a resis tor and a capacitor. As explained here instructables
If your arduino runs on 3.3 you can still use the rc filter but you need to add a bridge.

Improve this answer

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.