I have two BD241a transistors connected in parallel to a pwm output on my UNO. Its all on protoboard. The idea it to drive a DC motor with PWM
I have the base connected directly to the pin, collector directly to the +ve on the supplying lipo battery and emitor on the +ve of the motor, the -ve of the motor is going to the common ground of the circuit. There js a protection diode on the motors poles.
PROBLEM at 255 i have 5.4v on the UNO pin and the motor runs fast. Until i put strain on the motor, then thempin voltage drops to 2.5v and slowly drops wkth time.
Is it possiblenthat there is some backfeed from the transistor back to the pin thats killing it?