Ideal for benchtop use, this dual-band circuit was obtained from the 1995 Electronics Now magazine. The circuit can be powered with voltages from 5 to 12 V.
This Motorola circuit uses only one transistor. The circuit is from 1965 documentation. The...
This circuit uses a piezoelectric transducer to produce sounds like a buzzer. Frequency is...
This circuit was suggested by General Electric in a 1965 documentation. The circuit can be...