wakaka
Full Member level 4
**broken link removed**
suposely i hv this AC to DC converter and output is 5V to a microcontroller board.
If electricity cuts off, the board will shut down as well. What i wanna do is at the input of the LM7805, i parallel it with a 12Vdc supply. But it will still draw current from it.
How can i do in such a way that when the AC is off, then only use the supply from the 12Vdc supply??
plz help, thankx
suposely i hv this AC to DC converter and output is 5V to a microcontroller board.
If electricity cuts off, the board will shut down as well. What i wanna do is at the input of the LM7805, i parallel it with a 12Vdc supply. But it will still draw current from it.
How can i do in such a way that when the AC is off, then only use the supply from the 12Vdc supply??
plz help, thankx