This circuit was obtained in a Hobbyst Handbook from 1990. The circuit can be easily assembled since the SCR can be a TIC106 and the transistor a 2N30555.
Found in a publication from the 50's, this circuit uses a germanium transistor of the time. The...
This battery charger is suggested by National and has a switch that turns it off when the battery is...
The reference voltage for this circuit can be selected digitally. The circuit is from Radio...