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.
Found in an old Electronic Design, this circuit provides an output voltage that is the absolute...
Other operational amplifiers can be used in this circuit obtained from the manufacturer's own...
Frequency in this oscillator is controlled by a crystal. Any 1 MHz to 15 MHz can be used. The JFET can...