This circuit uses a transistor to trigger the alarm from a low quiescent current sensor. The relay is 12 V. The circuit is from Radio Electronics magazine, April 1975.
This project shows how to use an SCR in a starter circuit for a common fluorescent lamp. The SCR...
This circuit was found in a 1967 Motorola manual. Its purpose is to provide a very accurate...
This interesting application of a stepper motor as an encoder serves to test its application...