This circuit uses the SQ3524, a switching integrated circuit. The circuit was found in the April 1991 issue of Radio Electronics magazine.
Connected to a shortwave receiver, this circuit is intended to enable the decoding of signals in...
This circuit generates sinusoidal signals that depend on the input oscillator. The circuit is from...
This Signetics circuit uses a double 555 (556) to generate tone bursts at frequencies determined by...