This circuit is used to generate pattern bars on an analog television screen for calibration purposes. The circuit is from a 90s 303 Circuits.
This circuit was found in an old documentation and can be powered by a solar panel. The touch...
This circuit was obtained from 1967 documentation. It uses a sensor to determine the trigger...
This sophisticated logic probe for 5 to 12 V circuits (CMOS and TTL) was found in a 1980s...