This circuit is from an American 1967 documentation and can be implemented with modern equivalent transistors. The circuit serves as a Q multiplier.
This filters blocks radio interference or noise coming from the AC Power line. Noise such as the...
This crowbar protection circuit for non-regulators blows the fuse when the load voltage exceeds a...
This sophisticated logic probe for 5 to 12 V circuits (CMOS and TTL) was found in a 1980s...