Self-biasing JFET circuit (CB25563E)

This JFET amplification stage was found in the April 1993 issue of Electronics Now. The input impedance is 10 Megohms.

Perforated card reader (CB8261E)
Found in a 1967 Ferranti documentation, this circuit uses a LDR from that time as a sensor....
Alternative Energy Oscillator (CB14805E)
This oscillator works with voltages from 1 V of alternative energy sources, such as a battery of...
4-Bit Binary Counter (CB13459E)
This configuration, well known to those who study digital electronics, was obtained in a 1974...