This sequential tone generator circuit was found in the July 1980 issue of Radio Electronics magazine. It uses well-known integrated circuits. The tones are generated by programming resistors.
We found this circuit in an old American publication. The circuit is designed to measure the...
The integrated audio amplifier used in this project is not very common today, but more modern...
The circuit presented is from the Motorola Linear Databook of 1990. The integrated circuit is a...