Employing a unijunction and a triac of the era, this 1964 Electronic Design circuit uses a diac to trigger the Triac.
This circuit was found in the June 1995 Electroics Now magazine. The relay should be a sensitive type...
Frequency in this oscillator is given by C1 and C2. The circuit produces square pulses that can...
This circuit produces a 2 kHz tone on a standard piezoelectric transducer. The circuit can be used as...