Found in a 90s American documentation, this circuit mimics the Enterprise warning signal from the movie Star Trek. The signal must be applied to an amplifier.
The configurations of the two previous circuits can be modified to operate with a simple power...
The CMOS TLC555 can be gated from external CMOS circuits using the configuration shown here. The...
This circuit is intended to apply the music signal from a stereo to a telephone line for the...