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 unit gain circuit has a very low output impedance. The circuit is of the Linear Databook of...
This Hughes circuit is from 1968. Equivalent modern components can be used. The input impedance is...
The circuit presented is suggested by Mullard (Philips) in an old manual. The circuit uses a...