This circuit was found on an 80's Ham Radio. The transistor admits equivalent. The circuit can generate 20 to 100 MHz signals operating at the fifth harmonic of the crystal.
This circuit can be used in alarms, data links or áudio links using IR radiation. The circuit is...
The figure shows the basic configurations for unijunction oscillators. They are relaxation...
This circuit switches on an external load after a certain interval given by the capacitor. The...