Simple 1-tube receiver (T960E)

This 1V heater tube circuit was found on a Radio Craft from 1945. The circuit is for medium wave and can be used as a tuner.

Current Amplifier (CB13747E)
We found this circuit in the 1977 RCA Solid State ICs. The circuit consists of a current amplifier with...
Line Tracer Module for Robot (CB17175E)
This circuit can serve as a basis for a robot that follows a line on the ground. The circuit has...
Multi-loop alarm (CB26224E)
We found this circuit in the 1995 Encyclopedia of Electronic Circuits. The circuit triggers a...