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how to control firing angle of triac using optocoupler

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controlling firing angle of triac using optocoupler and 8051
 

have you understood working of opto-coupler and TRIAC? if not read the working.
 

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yes , i have , but just help me how to acheive this using 8051 controller
 
use timer option in 8051. when the firing angle(time here) reaches change the output of a pin. the pin should be connected to gate point of TRIAC. all changes u r supposed to do in timer and its count. the complete control u can achieve with it.
 

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