This is the circuit of a MW commercial radio obtained in a 1967 publication. The transistors are made of germanium and are powered by 4 common batteries.
This circuit is from Motorola's Linear Interface ICs from 1993. The MC1723 is the equivalent of...
T This circuit produces an audible signal when someone touches the sensor, or even approaches. The...
We found this circuit in a 1968 Electronics World. The transistors are from the era and...