This small phonographic amplifier was found in a 1967 General Electric documentation. The integrated circuit is from that time, providing 1.5 W of output power.
This circuit was found in a 1977 RCA documentation. The source must be symmetrical, but the...
This lock-up alarm circuit was found in a 1990s Radio Electronics magazine. The sensors are...
This circuit, from a 2002 documentation, checks the logic levels of the inputs, providing a...