This immobilizer circuit for the car was found in the Radio Electronics magazine of December 1976. It has several sensors blocking the ignition system.
This circuit was found in a 1986 publication. However, it can still be easily assembled, as the...
In the figure we have an anti-ring circuit with 4093. The duration of the pulse is given by R1 and...
This circuit was originally indicated to generate audio signal for analog TV sound. The circuit is from...