This circuit is from a Ferranti publication of 1968. The circuit generates a signal according to the crystal. The transistor may be a modern equivalent.
Waking up to a loud and clear sound from an audio oscillator, after up to 5 hours of sleep, or...
Short duration pulses or "clicks" can be generated with the circuit seen in the figure. The...
This circuit is from a 1992 Electronics Handbook. The circuit generates a special tone effect for...