Electronic car horn by NE556| Circuit Project

An LM556 dual oscillator/timer, U1, configured as a two-tone oscillator drives U2, a dual 4-watt amplifier. One of the oscillators, pins 1 to 6, contained in U1 produces the upper frequency signal of about 200 Hz, while the second oscillator, pins 8 to 13, provides the lower frequency signal of about 140Hz.
Increase or decrease the frequencies by changing the values of C2 and C3. U1′s outputs, pins 9 and 5, are connected to separate potentiometers to provide control over volume and balance. Each half of U2 produces 4W of audio that is delivered to two 8 ohms loudspeakers via capacitors C7 and C8.

Read Source:http://www.circuitsuggest.com/electronic-car-horn.html

This entry was posted on Wednesday, June 10th, 2009 at 8:28 am and is filed under Audio - Alarm, Automotive.

Circuit diagrams and schematics - Electronic projects

Electronic car horn by NE556 (function() { var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true; po.src = 'https://apis.google.com/js/plusone.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s); })();

Electronic car horn by NE556