This car alarm was found in a 1965 General Electric manual. The SCR can be commonly used with the TIC106 and sensors are placed in the doors using the existing courtesy light switches.
The UVTRON tube is an ultraviolet radiation sensor. In this circuit from Radio Electronics from...
This circuit was found in a 90s Popular Electronics. The circuit uses components from that time,...
An stable multivibrator with 50% of duty cucle can be mounted using the 555 as shown by the...