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pranam77, the board you shown that is also problem. i know the board manufacturer very well. abnormal sound coming from transformer when mains a/c
down to180v or lower.
hi friends...
pic 16f72 based sinewave inverter is working. but there is sum modifications required. i.e the relay driving transistor polarity and connections.
and one more thing is in given asm file having only single step charger, switching freq is 5.6khz, that is not suitable for long life...
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