Hi,
I’m aiming to control the speed of a 12V DC motor using PWM via a 43A BTS7960 driver connected to an Arduino Uno and potentiometer. For my project I only need the motor to turn in one direction. Having researched this, I’m still slightly unsure how I need to connect the Arduino and Driver for my requirements. Specifically, it’s the RPWM, LPWM, R_EN and L_EN pins I’m struggling to understand.
Could anyone advise me on how this should be connected?
Many thanks,
Mike
http://www.instructables.com/id/Motor-Driver-BTS7960-43A/
Just one Google search away.
Thanks,
Yes, I've seen that link. But If I only want to turn the motor in one direction should the LPWM, RPWM, L_EN and R_EN pins all be connected to the Arduino?
Mike
Yes, you have to connect both chips because one chip is only a half bridge. You might connect one PWM signal to GND but i must not be left floating (at least as far a I understand the schematic I found online, you forgot to post the schematic of your board).
All unused input pins on the motor driver should be connected to the appropriate logic level (HIGH or LOW), not necessarily to the Arduino.
Thanks a lot for the replies.
So to drive the motor in a single direction would I connect L_EN and R_EN to digital pins and write them HIGH. Then connect the LPWM and RPWM to PWM pins on the Uno - writing a PWM value of 0 to one and a value between 0 -255 for the other?
Mike
I'm having real problems with this. I followed the exact code and setup in this link but my 12V motor won't even move. If I listen closely as I turn the pot, all I get is an audible ringing noise coming from the motor. Even taking the pot out and just writing a PWM value doesn't make a difference.
About the circuit:
The IBT-2 H bridge is connected to a 12v SLA battery with a 15A fuse inline and SPST switch.
Arduino Uno is connected to 10K potentiometer and is using the USB power supply.
Could anyone offer any suggestions why this isn't working?
Thanks
Michael