Metal Detector (CB21929E)

This two-transistor metal finder was found in a Raytheon manual from the 1950s. The transistors are germanium from the time.

Fluorescent Inverter (CB15027E)
This sophisticated inverter circuit of excellent performance was found in a French publication in 1995. The...
Photodiode Sensor LMV358A (CB19653E)
The integrated circuit used in this application is the Texas Instruments LMV358A, a low voltage...
Random Number Generator (CB20177E)
This circuit is from 80s documentation, using still common CMOS components. The display is 7...