This circuit operates at a voltage of 1.3 V from a single mercury cell. We found in an old documentation and for the components used the frequency is 500 kHz.
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...