This circuit was found in an Elektor from the 90s. It makes use of digital CMOS integrated devices common today. The signal is controlled automatically sequentially.
Texas Instruments PCM5242 Audio Stereo Differential-Output DAC is a monolithic CMOS integrated...
This circuit was obtained from an English magazine from 1977. It is a toy musical instrument that...
This is one of the many hysteresis comparator circuits the reader may find in this section and on this...