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DiscoverCircuits.com
-- Hobby Corner
Last Updated on:
03/19/2008 06:54:11 AM |
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24V DC Powered Beeper with 4 Separate Inputs
designed by David A. Johnson, P.E. |
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May 17, 2007 |
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24v DC is a very popular voltage used in industrial settings. The circuit below was designed to accept four different 24v DC alarm input
signals, which are then used to drive a single low power beeper. The beeper is a magnetic type with its own oscillator/driver. The four diodes form an “OR” gate so any one of the
four inputs will cause the beeper to make noise. A CMOS version of the popular 555 timer is used to strobe the beeper on and off at about 1Hz. |
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Click on the Drawing to view PDF |
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