project-2020 Posted June 2, 2017 Share Posted June 2, 2017 Hello, using PMOD HB3 with an arduino to run a DC motor backwards and forwards. everything was working fine but now when direction pin is LOW and enable pin is HIGH I only get a very small voltage going to the motor. when the direction pin is HIGH and enable is HIGH I get 12v to the motor (which is what my external power supply provides). is there something broken on the PMOD board? Thanks, Mark Link to comment Share on other sites More sharing options...
jpeyron Posted June 2, 2017 Share Posted June 2, 2017 Hi @project-2020, It sounds like you shorted at least part of the pmod HB3. In the reference manual for the Pmod HB3 here under section 2: Interfacing with the Pmod it states that the Direction pin must not change state while the Enable pin is at a high voltage state. If this does occur, one set of switches that are driving the motor will be closing while the other set is opening, allowing for the possibility for both sets of switches to be open at the same time, creating a short. thank you, Jon Link to comment Share on other sites More sharing options...
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project-2020
Hello,
using PMOD HB3 with an arduino to run a DC motor backwards and forwards.
everything was working fine but now when direction pin is LOW and enable pin is HIGH I only get a very small voltage going to the motor.
when the direction pin is HIGH and enable is HIGH I get 12v to the motor (which is what my external power supply provides).
is there something broken on the PMOD board?
Thanks,
Mark
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