MrEd
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On 2001-08-17 16:46, whoops wrote:
As zero crossing detector I use a double phase rectifier with two diodes, resultiging voltage applied to a comparator with REF level set low.
at the microcontroller I check if the comparator output is low for while to prevent triggering at false edges.
This is working now for many years withot problems.
Whoops
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