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 1982 documentation. It uses only one integrated circuit and can be...
Only those who know the secret activation code will be able to turn on the device connected to...
This 2 meter (144 MHz) preamplifier is intended for use with portable transceivers. The...