Hi Folks,
I'm a total newbie with electronics, but have been make doing so far until now.
I have two IRF740 MOSFET's controlling a string of LEDS (depicted with single led) one set is blue the other is red.
I dont understand why but there is some backfeed in the circuit where both strings are always on regardless to the the MCU pins being high or low, this even occurs when the circuit (as per attachment) is totally disconnected from the micro.
I'm running out hair to pull out, please help!
I know it's something really basic but i don't see it!!!
thanks in advance.
I'm a total newbie with electronics, but have been make doing so far until now.
I have two IRF740 MOSFET's controlling a string of LEDS (depicted with single led) one set is blue the other is red.
I dont understand why but there is some backfeed in the circuit where both strings are always on regardless to the the MCU pins being high or low, this even occurs when the circuit (as per attachment) is totally disconnected from the micro.
I'm running out hair to pull out, please help!
I know it's something really basic but i don't see it!!!
thanks in advance.