??? 04/23/10 07:47 Read: times |
#175311 - Here's what i have done Responding to: ???'s previous message |
please check the following links,where i have posted my findings
circuit layout for direct Mains ZCD with 3 options http://img532.imageshack.us/img532/79...inszcd.png Wave form on Oscilloscope(simulated) http://img46.imageshack.us/img46/189...lation.jpg Timings of ZCD http://img227.imageshack.us/img227/60...imings.jpg connecting a bridge after mains and before 10Meg resistor (option 2) gives falling edge pulse on each Zero crossings irrespective of Mains phase. I need expert opinion on using this option. I'll be using external clamp diodes(1N4007)on INTx pin Regards, Arun |