Found in an Electronics World of 1968 this circuit can use any SCR and diodes depending on the load. The circuit is full wave and the unijunction can be 2N2646.
This circuit can be used with receivers to attenuate signals that may cause interference. The...
This circuit was adapted from an Italian publication that no longer exists. This is “Onda Quadra”...
This ultra-low power metronome was found in a 1991 documentation. The output transistor is general...