60's crystal radio (CB22171E)

Found in an English publication from the 1960s, this circuit uses period components, including the commercial grade coil.

3-Way CMOS Switch (CB12305E)
This circuit implements a 3-way control, with outputs in A, B and C, using CMOS integrated...
3 LEDs Flasher (CB16409E)
We found this circuit in a 1980 documentation. The flasher uses 3 transistors in the configuration of an...
Programmed Duty Cycle (CIR095E)
The duty cycle of a Schmitt Oscillator can be programmed by R1 and R2 in this circuit. The...