This circuit was found in Motorola's 1967 documentation. The circuit makes use of power transistors of the time. For pulse pickup an appropriate pickup coil is used.
This circuit was found in an American 1980s documentation. The components are current but most...
This circuit can control two loads and is also equipped with a light sensor for its trip. The...
This circuit can flash for up to 30 months using alkaline batteries as shown in the table next to the...