This 9 V battery eliminator was found in Radio Electronics magazine from June 1966. The transistor is of medium power and must be equipped with a small heat sink.
This circuit synchronized by the power grid was found in a 90s Popular Electronics. Transistors are...
This simple timer based on unijunction and SCR transistors is from 1995 documentation. The maximum...
We find this automatic battery charger in an 80s ON Semiconductor circuit and application manual. Bridge...