This circuit was found in a 90s Radio Electronics. The integrated circuit admits an equivalent. The power supply will depend on the integrated circuit used.
The presented circuit produces the sound of a fireman's siren. In place of the output transformer with...
This circuit, which appears at other times on this site has this version obtained in a Hands On of...
This circuit was obtained from a Linear Technology manual from the 1990s. The sensor is of the...