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.
Vishay's VCNL4200 integrated circuit consists of a fully integrated proximity detector containing...
This circuit was originally intended for reading movie soundtracks. The circuit is from 1967 and...
We found this circuit in the 1994 Linear Applications Handbook from National Semiconductor. The...