[time-nuts] Simple AC mains zero-cross detector
ed breya
eb at telight.com
Sun Dec 21 13:59:35 EST 2014
It seems to me that a low voltage secondary should be OK by using a
fast comparator IC rather than a transistor to decide - the gain of
the IC allows for much smaller detection levels, so the equivalent
zero-crossing velocity could be the same. An IC tripping in a 10 mV
band should provide the same effective ZC velocity at 12 V input as a
transistor working around 100 mV with 120 V input. Or am I missing something?
Ed
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