This reflex receiver for the mid-wave range employs germanium transistors of the time. We found it in an English documentation from 1967.
This circuit causes an instrument needle to oscillate to signal an event. The circuit is powered by...
A touch in this circuit turns-on the lamp or the relay. Power supply is according the lamp or...
This biestable circuit was found in a Popular Electronics from the 90s. The circuit has an unusual...