This circuit was found in a 1965 General Electric manual. What it does is give a warning if you leave the vehicle with the headlights on or lights inside.
This circuit was found in an American audio documentation from 1968. The configuration can be...
This converter uses an SG1524 integrated circuit, which is uncommon nowadays. The circuit is from...
This circuit was found on an 80's Ham Radio. The transistor admits equivalent. The circuit can...