Control the dc motor 40A controller

[nullusr]

Hello,

How to connect a dc motor speed controller to, for example, arduino.

I bought this controller.
https://pl.aliexpress.com/item/DC-1...-PWM-Speed-Control-Regulator/32830644146.html

There is a potentiometer used as a voltage divider. The potentiometer has a voltage from 0 to 5V.
Do I have to use a transistor?

 

[(*steve*)]

You might be able to use an analogy output from the Arduino (suitably filtered) as a replacement for the pot of it is just a variable voltage divider.

 

[nullusr]

Ok, when i don't have analog out put can I use PWM ?

 

[(*steve*)]

Yes, that's exactly what you use. Then you filter it to get a DC voltage proportional to duty cycle.

Google "Arduino pwm analog voltage"

 

[WHONOES]

If you have PWM available from your Arduino, you don't really need the speed controller. Just connect a large MOSFET to the PWM output and program accordingly. You will probably need a totem pole driver circuit to successfully drive a large FET from your device. Sounds horrible but is dead simple.

 

[nullusr]

ok, which transistor will handle 40 amps without burning?

 

[Minder]

NTP60N06L logic level mosfet?
Max.

 

[WHONOES]

Yup, that would probably do it or a IRLB4030.
If you have trouble with the totem pole driver then come back.

 

[nullusr]

Thank you Minder and Whonoes for recommending the transistor, IRLB4030 it was easy to find on aliexpress, I will try do myself H-Bridge dc driver.

I also try use PWM on https://pl.aliexpress.com/item/DC-1...-PWM-Speed-Control-Regulator/32830644146.html. But the controller only reads boundary values from PWM and sets the motor speed to 1% or 100%.

 

[WHONOES]

AS I said in #5, you don't need a separate speed control module. You can derive that directly from your Arduino with a large FET using the pwm you were planning to drive the module you bought. Much simpler.

 

[nullusr]

Such information, I used the RC filter (https://www.instructables.com/id/Arduino-RC-Circuit-PWM-to-analog-DC/ )behind the PWM signal to control the controller (http://pl.aliexpress.com/item/DC-10...-PWM-Speed-Control-Regulator/32830644146.html) and it works!