This anti-theft circuit was found in a 1985 documentation. It uses common components that can still be found easily. The relay is 12 V and the circuit has timings of 3 minutes and 20 seconds.
This circuit was found in the September 1972 issue of Radio Electronics magazine. The circuit uses...
The circuit shown in the figure consists of an amplifier for stereo sources with Maxim's MAX9723...
This circuit was obtained in a 1980 edition of Elementary Electronics a magazine that no longer...