This 6-transistor radio was sold in Japan in the 1960s. The super-heterodyne circuit for the OM band was powered by ordinary batteries.
This circuit was obtained from Signetics documentation from the 80's. The components used are from...
The basic configuration for a 4017 when used as a decade divider with one-of-ten decoded outputs...
This circuit converts sinusoidal signals into squares and can be powered by voltages from 1.5 to 5...