I am building an 8 channel relay board to be powered from the outputs of an MCU using NPN transistors as drivers. The relays have 5v coils.
I know I need to put a reversed diode across each relay coil to stop back EMF . I am trying to keep the pcb small so am using smd where I can ,and I have lots of 1n4148s in smd package, would they be suitable ?
Don
I know I need to put a reversed diode across each relay coil to stop back EMF . I am trying to keep the pcb small so am using smd where I can ,and I have lots of 1n4148s in smd package, would they be suitable ?
Don