Jayma Posted March 31, 2018 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.
Tam Posted March 31, 2018 Posted March 31, 2018 Just curious... what does this have to do with vaping? Walt 1
Walt Posted March 31, 2018 Posted March 31, 2018 Ok then..... You're just visiting this planet right? Try a robotics forum maybe?
Tam Posted March 31, 2018 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
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