This symmetrical four voltage source was found in a 1968 Motorola documentation. The circuit is of a type that was commonly used in that time amplifiers.
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...