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 purpose of this circuit is to 'produce a beam of infrared rays modulated at a frequency that...
This circuit is from Motorola documentation on 1976 power devices. SCRs are powered according to...
We found this good audio amplifier that must be powered with a voltage up to 14 V in a circuit manual...