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 is from a 1970 publication. The time constant is given by 1.3R x C where R is the...
This circuit shows how to use a PNP transistor to drive a load from 500 mA to 1 A, depending on...
This circuit of old American documentation (1965) can be applied to any transistor. | Clique na...