samy555
Full Member level 4
This is the electronic circuit,,,,
When the main 220Vac is exist the transistor off
When the main 220Vac is OFF the transistor ON
I can not understand how the circuit works, what is the mystery in using D1 & D2?
It's amazing that the battery can not make the transistor On!
The other thing is that the main power alone control the state of the transistor and in a reverse manner ???
thank you
When the main 220Vac is exist the transistor off
When the main 220Vac is OFF the transistor ON
I can not understand how the circuit works, what is the mystery in using D1 & D2?
It's amazing that the battery can not make the transistor On!
The other thing is that the main power alone control the state of the transistor and in a reverse manner ???
thank you