Voice Scrambler (CB22462E)

We found this circuit in a Popular Electronics from 1992. It consists of a voice scrambler used in telephone transmissions.

Wheel of Fortune (CB20962E)
This electronic roulette circuit with 10 numbers was found in a Popular Electronics from the 80s....
Electronic dice (CB7006E)
Found in an old Popular Electronics this circuit appears in other variations on this site and in...
100 Hz Fourth Order High Pass Filter (CB25819E)
This circuit was taken from an article in Electronics Now magazine in February 1995. The power...