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.
This filter was found in documentation from the 90s. The cutoff frequency is 2900 Hz. Changes can be...
This circuit generates frequencies determined by R3 and C1. We found it in the Radio Electronics magazine...
Found in the July 1994 Electronics Now magazine, this circuit drives a relay up to 12 V depending on...