This circuit keeps a set of lamps permanently on, even when there is a power cut. The circuit can be adapted to use LEDs and the 12 V battery can also be changed according to the lamps or LEDs.
This control circuit for direct current motors uses a 741 and an operational one of unusual power...
This is the traditional voltage follower configuration with the 741 operational amplifier. The...
This type of configuration can be seen elsewhere in this section. This is from a 1965 General...