Using a dual 555 CMOS this very useful circuit on the bench was found in the July 1998 Electronics Now magazine. The circuit is battery powered.
This micro AM radio will tune strong stations in the frequency range between 530 and 1,600 kHz....
This circuit was found in Radio Electronics from the 90s. The components used are common, and the...
This circuit for measuring very low currents was found in an American documentation from the...