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.
The block shown in the figure is a basic source with a configuration widely used in technical...
The output current of this source is determined by resistor R. For 20 ohms, we have 50 mA. For 10...
This circuit, for its simplicity and the fact of using a super-regenerative detector only works...