Do I need to use PWM pins on tb6612fng

Projects General Guidance
1

I have a pololu micro metal gearmotor (Pololu item #: 1101) and I have connected it to a magnetic encoder from pololu as well. I then connected this to a tb6612fng from adafruit and am wondering if I need to use the pwm pins on it as I don't need speed control in my project. Will it still work if I don't use them?

2

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There is no need to apply a PWM signal if you don't need speed control, however the PWM pin must be high for the motor to run.
There is a pulldown resistor on the PWM input, so it needs connecting to something to make it high - might as well use an Arduino digital output.

See the table below from the Sparkfun TB6612FNG hookup guide:

In1 In2 PWM Out1 Out2 Mode
H H H/L L L Short brake
L H H L H CCW
L H L L L Short brake
H L H H L CW
H L L L L Short brake
L L H OFF OFF Stop

Don't forget STBY must be high for the motors to drive.

3

So I can just connect it to a pin and set that pin from high to low depending on the state I want to put the motor into without fiddling with the pwm controls?

4

Hi,

Yes.. it doesn't have to be a PWM capable pin.

Tom.. :smiley: :+1: :coffee: :australia:

5

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