This is a simple
circuits to switch between two different voltage sources using two
diodes.. No need of any relay or complicated circuits.If you are using
schottky diodes then voltage drop will reduced.
when we connect to voltages we get the highest one on the output.Here in this example if we connect 9v first then the output voltage will be 8.6v(9v-diode drop) and when we connect 12 v in this circuit we will get 11.4v(12v-diode drop)
when we connect to voltages we get the highest one on the output.Here in this example if we connect 9v first then the output voltage will be 8.6v(9v-diode drop) and when we connect 12 v in this circuit we will get 11.4v(12v-diode drop)