We found this relaxation oscillator in a 1967 General Electric documentation. The frequency is given by the capacitor. The obtained waveforms are shown.
This powerful amplifier was part of commercial sound circuits from the 90s. The integrated circuit...
This circuit generates a control tone that serves to adjust amplifiers, check audio cables. The...
This circuit locks when the sensors are opened. The relay can be 6 or 12 V depending on the power...