This circuit was obtained from the September 1977 issue of Radio Electronics magazine. The circuit is based entirely on transistors and two SCRs. The power supply with the inclusion of a battery is given.
This alarm circuit was found in April 1975 Radio Electronics magazine. The circuit uses a 12 V...
This circuit was found in the July 1991 issue of Radio Electronics magazine. It converts a binary...
This transistor radio was manufactured in the 60s and has 6 transistors from that time. The...