This is one of the first radios with an integrated circuit. The circuit is from a Radio Electronics from November 1969. The circuit is powered by a 9 V battery.
This circuit was found in the May 1989 issue of Radio Electronics magazine. The components can be...
Using the 741 this basic circuit was found in the November 1973 Radio Electronics magazine. The...
This circuit came out in an English magazine from 1977, but it can be easily assembled today, as...