This regulator circuit was found in the June 1984 issue of Radio Electronics magazine. The LM11 is a power operator. Voltage selection is done by a switch,
This simple circuit is intended to test integrated circuits 555 and 741 in 8-pin DIL enclosures. In both...
Upon receiving a sound of sufficient intensity, the relay locks and remains so until the power is...
We found this circuit in a Motorola documentation from 1968. Phototransistors are common and...