This circuit simulates an American siren and can be found elsewhere on this website and section. The circuit is from a 90s documentation. Preferably, the signal should be applied to an amplifier.
This oscillator for the practice of telegraphy provides a good sound in a loudspeaker, with only...
This ultrasonic insect repellent was found in American documentation from the 1980s. The...
The short-wired circuit is suggested by National Semiconductor in documentation on the LM3909. The power...