This low frequency divider uses unijunction transistors. The bipolar transistor can be a BC548 and the zener diode Z4XL can be a 12 V zener. The circuit was found in a 1967 publication.
Found in American documentation from 1968, this circuit uses both diodes and a neon lamp to...
This circuit was found in a Radio Electronics from June 1966. The transistor is from the time. The...
This circuit generates two pulses per cycle of alternating voltage for full wave control. The...