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.
This circuit uses a JFET at the input to increase the impedance, and is temperature compensated...
Using L144 operational, this circuit applies to other equivalent operational. The circuit is from...
Suggested by General Electric in 1967 documentation this circuit uses an isolation transformer to...