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jess Posted - Jun 23 2011 : 10:49:33 AM
Hi, could you please let me know if I could convert the 12v low voltage alarm to 24v low voltage alarm?
Thanks.
3   L A T E S T    R E P L I E S    (Newest First)
m4mansoor Posted - Jul 17 2011 : 11:40:30 PM
Gr8 help
jess Posted - Jun 25 2011 : 10:25:23 AM
My thanks, you are great!
Aaron Cake Posted - Jun 25 2011 : 10:08:55 AM
The circuit is a very simple comparator. It compares the voltage seen at pin 4 (set by D1 and R1) to the voltage at pin 5 (set by R2).

To run the circuit from 24V all you need to do is either use an op-amp with a 24V spply voltage, or regulate the voltage down to 12V for the circuit. Then swap out the zener with a 24V unit. R3 will need to be recalcuated based on the current draw of your LED. And you'd need a 24V buzzer.

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