I am using a small 6V DC motor with a rotary encoder and TB6612FNG controller to drive it. I can start / stop / brake the motor using the controller no problem.

What I want to achieve is the following: When the motor is stopped and there is no electrical power to the controller, I want the motor to stay in "braked" state by default. For example, if the power is lost, I don't want the motor to be allowed to spin freely. I assume this would (probably) be achieved by short circuiting the terminals.

My questions are:

  1. Can TB6612FNG do it for me? I tried reading the specs sheet, but honestly it was a bit too technical for me.
  2. If not, what would be the best method to achieve this goal?

I am looking for the easiest and most reliable solution, have no problem to buy other controller for the task. I am also a programmer without much electrical engineering background, so I hope this question makes sense :)


  • 1
    \$\begingroup\$ 1. Yes. Page 4. Look for short break. \$\endgroup\$ – winny Sep 3 at 9:33
  • 1
    \$\begingroup\$ @winny Found it, but I am probably too dumb to read that diagram. Can you explain more how to get that controller leave motor terminals in shorted state by default? \$\endgroup\$ – Karolis Sep 3 at 9:43
  • 1
    \$\begingroup\$ Depends what you mean by default. Before your (I assume you have one) MCU has booted? Weak pull-up on both IN1, IN2 and STBY. Default once your MCU has booted, make sure your program defaults to HIGH on said pins. \$\endgroup\$ – winny Sep 3 at 9:46
  • 2
    \$\begingroup\$ @tlfong01 could you please stop spamming this thread with your head scratching / confusing comments? I am looking for replies from people who actually know the answer. \$\endgroup\$ – Karolis Sep 3 at 10:43
  • 2
    \$\begingroup\$ @tlfong01 I would like to kindly ask you to please stop helping me with this problem. Thank you. \$\endgroup\$ – Karolis Sep 4 at 8:32

Your Answer

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

Browse other questions tagged or ask your own question.