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.
This circuit is from a technical documentation from the 70s, and equivalents can be used for...
This circuit was found in a 1964 MOSFET applications manual. The circuit uses period general...
Found in American documentation from the 1980s, this circuit can generate signals from 50 kHz to...