If a relay coil is powered by a regulated power supply, will the back emf g enerated by the coil cause any damage to the regulator as cathode of protec tion diode is at o/p of the regulator? From what I read about driving relay s using trnasistors the protection diode protects the transistor from the b ack emf genereated by the relay by diverting the back emf away from the trn sistor. Now it goes to the o/p of the regulator powering the relay coil.
thanks bhav