??? 05/04/10 08:07 Modified: 05/04/10 09:33 Read: times |
#175653 - can be wrong circuit below Responding to: ???'s previous message |
![]() http://www.8052.com/users/stefan63/ZCD.tif Comparator Q1 must be low consumption one - as much as possible . On optocoupler output will be one "good" edge (OFF to ON transition) every mains cycle. |