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 3-digit code switch was obtained from an old American documentation. The capacitor is 470 uF...
This antenna or booster amplifier operates with signals from the midband (MW) range up to the VHF...
The circuit presented here shows how two flip-flops of a 4027 can be connected to perform a...