Help! ESP32 burnt by Motor Drive Module.

username
Posts: 114
Joined: Thu May 03, 2018 1:18 pm

Re: Help! ESP32 burnt by Motor Drive Module.

Postby username » Tue Apr 09, 2019 12:10 pm

its possible. Another option to try on a new motor driver board to help is to put a 100 or 220 Ohm resistor in series with your 2 control wires and PWM wire to your driver board.

human890209
Posts: 48
Joined: Wed Aug 15, 2018 8:56 am

Re: Help! ESP32 burnt by Motor Drive Module.

Postby human890209 » Fri Apr 12, 2019 10:02 am

username wrote: its possible. Another option to try on a new motor driver board to help is to put a 100 or 220 Ohm resistor in series with your 2 control wires and PWM wire to your driver board.
Thanks. I will try that. Could you tell me the physics theory of the small resistor? Do they protect the ESP32 from shortcut or something else?

username
Posts: 114
Joined: Thu May 03, 2018 1:18 pm

Re: Help! ESP32 burnt by Motor Drive Module.

Postby username » Fri Apr 12, 2019 11:19 am

Thanks. I will try that. Could you tell me the physics theory of the small resistor? Do they protect the ESP32 from shortcut or something else?
resistors limit current. the higher the value the more they limit. For example, if you set a GPIO pin high, but that pin is shorted to gnd for whatever reason you will wind up blowing that pin. However, if you had a series resistor in line with that pin and this happened you would protect that pin from that happening.

human890209
Posts: 48
Joined: Wed Aug 15, 2018 8:56 am

Re: Help! ESP32 burnt by Motor Drive Module.

Postby human890209 » Sat Apr 13, 2019 4:24 am

I understand now. Thanks.

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