This circuit is from a 1969 Electronics World. It generates 100 kHz sinusoidal signals determined by the crystal. Capacitors must be ceramic.
Under this name, Electronics Now magazine published this laser projector in its last issue of...
This circuit uses two Raytheon RC4558 operational amplifiers that are similar to the 741. The...
This resistance meter uses a two-transistor oscillator as basic configuration. The tone produced...