This monochrome analog TV pattern generator was found in the July 1991 issue of Radio Electronics magazine. The circuit generates a voltage that must be applied to a modulator.
We find this microphone voice effect in 1992 documentation. The vibration of the relay contacts...
We can also use the 4011 on this CMOS circuit that makes use of a crystal headset. The power...
We found this circuit in documentation from the 1980s. The integrated circuit used is uncommon today,...