This circuit was found in the January 1980 issue of Radio Electronics magazine. It is a digital slot machine using common logic circuits. It can still be easily assembled today.
This circuit was found in a 90s Popular Electronics. The components are from the era. R3 must be...
This filter, which rejects frequencies around 1 kHz, was found in the August 1993 Electronics Now...
This circuit, which can act as a shield, was found in a 1969 documentation. The circuit uses...