2 channel dimmer problem~

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takbbb

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two channel dimmer

i use mcu to control 2 channel dimmer
However the light bulb lightness was not even

say when i fire @50% duty on 2 triac , one is brighter than other.

can anyone suggest any solution??
 

Are you using the same MCU to fire 2 triacs? and also let me know are the two triacs independently fired are parellelly? And when you dimm 50% with one channel, whats the status of the 2nd one? A schematic would be fine to study the problem.
 

Yes 1 MCU 2 I/O to trigger 2 indepentent triac.

I will post the schematic later

but it 's just basic dimmer circuit with 2 output.

thx anyway~
 

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