Nicholas
Member level 4
zero crossing relay
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.
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.