well im not really sure, iv been doing a BTEC nation deploma in electrical and electronic engineering, this is an assignment iv been given from the fault finding module. i suspect they made it complicated intentionaly to give a challenge, but im not that great at reading circuits
. i understand the basics of it such as u turn VR1 to increase or decrease speed, the LEDS connected to IC4 turn on when more speed is increased, IC3 comparator compares the two signals from VR1 and the lower circuit, and levels them out and outputs the results. this output decides the speed of the motor. i think IC2 gives some sort of pulsed signal, im not really sure. what i need is more detail really, and the bit that reall confuses me is how OP1 takes a signal from the first part of the circuit, i wasnt aware that a signal could travel through ground or power rails... i thought they only put power into a circuit, im pretty much a noob in electronics really
what i really need is a fairly detailed, but not too much indepth, description of the circuit. where the signal goes really. thnx for the help so far