Nicholas
Joined: 21 Feb 2004
Posts: 78
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 08 Oct 2004 15:16 Help with relay drive zero crossing |
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Can I use only one Input pin on MCU to implement zero crossing for relay drive?
I used this pin as mains frequency signal input for now , and do relay drive in a fixed delay time after detecting zero crossing . But cause relay response time varies from one to one , so , a fixed delay time can always work , so , any more good solution ? only one I/O left , no more.
Hope anyone help. thx.
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