High impedance stage (CB20564E)

This high input impedance amplifier stage was found in a 1963 documentation. The transistor germanium of the time.

Lie Detector (CB25722E)
Small variations in the resistance of the subject's skin holding the test leads are detected by...
LEDs Effects (CB25715E)
Recommended in an article in Electronics Now magazine to draw attention, this circuit makes two...
Operational Triangular Generator (CB13242E)
This circuit, found in an old publication, uses operational amplifiers from National Semiconductor that are...