This 1980s circuit was found in Motorola documentation. The circuit uses period components that admit of equivalents. Light feedback in a modern version can be done by optical fiber.
Found on Popular Electronics in the 1980s, this circuit detects a change in air pressure using a...
This special effect circuit with LEDs using the 4017 was obtained in a 1982 publication. LEDs are...
We found this version of the siren that makes the American police siren sound in a 1980...