rpter Posted June 10, 2004 Report Share Posted June 10, 2004 It's been a long time since i've played around with electronics, anyway i figured i start again and decided to start with PICS.So my first PIC circuit (16f84A) is up and running flashing an LED.Now i've decided to connect a transistor to the pin instead of the led.I've used a TIP120, but as soon as i connected my dc motor the circuit goes loopy, i have another led flashing and its a though the motor is screwing up the timing.when i replace the motor with a resisitor and led (via the transistor) it works again, so everything with the transistor is fine.i've tried everything i can think of (so far anyway...), but now i'm just puzzled, i know i must be doing something really obvious wrong, but i just cant figure it....i've tried using a different power source for my motor(connecting the 2 diff power source GND's together), but this just did the same.i'm using a variable regulated bench power supply....Any body have any suggestions?ThanksRoland Quote Link to comment Share on other sites More sharing options...
MP Posted June 11, 2004 Report Share Posted June 11, 2004 rpter, This should actually have been posted in the microcontroller area for best responses. Why don't you post your circuit and question there? Just so you know, a PIC cannot source much current. MP Quote Link to comment Share on other sites More sharing options...
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