Jayma Posted March 31, 2018 Share Posted March 31, 2018 I have a problem with my permanent magnet DC brushed motor. I'm trying to drive it from N-Channel and P-Channel MOSFETs from STM32F100 pin (3,3V logic). I want to turn the motor on and off only, speed is controlled via step-down converter (LM2679-ADJ) and potentiometer. At first I tried to turn the motor on by push button connected to STM pin. Every time the motor has stopped after half of a turn (it has mechanical commutator). Both transistors turned off without my input. Later on I've put instruction in main loop of STM to constantly turn on the N-MOSFET and the motor started to work properly. I wonder what is wrong in schematics that causing that particular situation. I measured voltage across Zener diode and it's 12V when N-MOSFET is turned on. IRF5210 is fully turned on at Vgs=-10V according to datasheet ( http://www.kynix.com/uploadfiles/pdf0125/IRF5210L.pdf). Schematics in attachment. Any help will be appreciated. Link to comment Share on other sites More sharing options...
Tam Posted March 31, 2018 Share Posted March 31, 2018 Just curious... what does this have to do with vaping? Walt 1 Link to comment Share on other sites More sharing options...
Walt Posted March 31, 2018 Share Posted March 31, 2018 Ok then..... You're just visiting this planet right? Try a robotics forum maybe? Link to comment Share on other sites More sharing options...
Tam Posted March 31, 2018 Share Posted March 31, 2018 1 hour ago, Walt said: Ok then..... You're just visiting this planet right? Try a robotics forum maybe? We don't know if he's trying to create a whole new type of mod... Walt 1 Link to comment Share on other sites More sharing options...
cany Posted April 1, 2018 Share Posted April 1, 2018 Hmmmmmmmmmmmm Walt 1 Link to comment Share on other sites More sharing options...
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