Used in radio reception, this circuit was found in the February 1983 Radio Electronics magazine. The integrated circuit is the NE570 IC, and the power supply is 3.6 V.
This low-power circuit was found in the March 1990 issue of Radio Electronics magazine. It...
Found in RCA documentation from the 1970s, this circuit uses currently unusual integrated...
This transmitter for the 7 MHz range, as we can assume by the number of turns of the coil, since the...