Friday, April 12, 2013

24V DC Powered Beeper with 4 Separate Inputs

24v DC is a very talked-about voltage used in industrial environments. This interest circuit beneath was once designed to settle for four completely different 24v DC alarm input alerts, which are then used to power a single low power beeper. The beeper is a magnetic type with its own oscillator/driver. The 4 diodes kind an “OR” gate so any one of the 4 enters will cause the beeper to make noise. A CMOS model of the favored 555 timer is used to strobe the beeper on and off at about 1Hz.


Source :Streampowers

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