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Topic: Help: brownout detection for Arduino Uno (Read 183 times) previous topic - next topic

mikechale

Apr 25, 2019, 06:46 am Last Edit: Apr 25, 2019, 06:53 am by mikechale
I want to detect brownout and use it arduino uno which is powered by Secure UPS.

Maybe I use adaptor connected directly on 220v, and detect its voltage in arduino (to detect brownout?)

or maybe I hack this Secure UPS, finding the circuit pin to detect brownout?


Coding Badly


"dry contact" with your UPS model and manufacturer is a good key-phrase for a web search.

"serial connection" is also a possibility.

A 5V wall wart works well for power failure detection (but not for a brown-out).


wolframore

A 5V wall wart works well for power failure detection (but not for a brown-out).

to undestand this comment think about what is in your wall wart.  They are either transformer with rectifier and decoupling/filter or switching with rectifier and filter.  Either case they are decoupled using a capacitor.  Due to the capacitor filtering out fluctuations in the power supply, it is not possible to sense a brownout unless it was for a significant amount of time on a power supply that was drawing significant amount of current (which this one does not sound like).
Bad Boys Rate Our Young Girls But Violet Goes willingly - Get Some Now :) - ELI the ICE man

Coding Badly


Jack Christensen made a power trouble logger.  I believe he used a chip specifically designed for the purpose (that includes a real-time clock).  This should get you started...

https://www.google.com/search?q=Jack+Christensen+arduino

This looks more directed without eliminating the positives...

https://www.google.com/search?q=Jack+Christensen+power+failure+alarm


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