Hi All ,
i have made a mistake and need to discuss the result with you ,
i have made a new pcb for controlling stepper motor but i forgot to put the diode between the emitter and the collector of the TIP120
that burnt the microcontroller 16f84a
could you please tell me what is the purpose of the diode in the tip120
and how my microcontroller burnt although i have the buffer 4050
what will happen when i neglect it
here is the original the schematic in case you would like to see it
https://www.imagesco.com/articles/picstepper/03.html
i have made a mistake and need to discuss the result with you ,
i have made a new pcb for controlling stepper motor but i forgot to put the diode between the emitter and the collector of the TIP120
that burnt the microcontroller 16f84a
could you please tell me what is the purpose of the diode in the tip120
and how my microcontroller burnt although i have the buffer 4050
what will happen when i neglect it
here is the original the schematic in case you would like to see it
https://www.imagesco.com/articles/picstepper/03.html
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