This simple two-transistor FM transmitter was found in the November 1991 issue of Radio Electronics magazine. The circuit has a 2 + 2 turn coil of 28-gauge wire with a diameter of 1 cm.
In the figure we have the way to use a zener instead of a filter capacitor. The zener can have the...
ST Microelectronics has, in its line of low voltage drop linear regulators, the KD1084xx (fixed) and...
This remote control for resistive loads using a triac appears elsewhere on this site. The circuit...