I'm trying to pulse 110 volts dc
I'm trying to pulse 110 volts dc 3 millisecs apart using an attiny, but im afraid that the emf fluctuations from the coils im driving could ruin my attiny... so I want to use an octocoupler to isolate the voltage spikes, but do not know which one to get.
PS. Say I have 2 circuits, one is high voltage and one is low voltage.. and the only line they share is GND.. Is there any chance that the high voltage fluctuations from the high voltage circuit could still affect the lower voltage circuit?
Some inductive loads (motors) don't like to be hit with a sudden voltage spike