??? 05/03/10 22:40 Read: times |
#175643 - Galvanic isolation Responding to: ???'s previous message |
I would use a zero crossing detector that provides galvanic isolation. Something like this:
This circuit generates a high pulse of 0.5msec length at every zero crossing of mains voltage. Take care that the 27k/2W resistors can withstand surges. Kai Klaas |