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DiscoverCircuits.com -- Hobby Corner
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Tuesday, June 01, 2021 03:06 PM
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Beeper Circuits |
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24V DC Powered Beeper with 4
Separate Inputs
May 17, 2007
designed
by David A. Johnson, P.E. |
| 24v DC is a very popular
voltage used in industrial settings. This hobby circuit below was designed
to
accept four different 24v DC alarm input signals, which are then used to drive a
single low power beeper. |
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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 Circuit Below to view PDF of Schematic |
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eMail David A.
Johnson, P.E. about this circuit |
