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Mains Failure Battery Backup Circuit for Arduino

Last Updated on February 17, 2018 by Admin 1 Comment

The post describes a clear-cut mains malfunction backup circuit for offering Arduino boards an uninterruptible supply throughout this kind of circumstances.

arduino2Bback up
The most basic solution to put into practice the offered application is as simple as utilizing two diodes as demonstrated in the above diagram.
The layout demonstrates two diodes with their cathodes associated collectively and anodes terminated to a 14 V source and anodes to the positive of a 12 V battery source respectively. The typical cathodes of the diodes are additional hooked up to a IC 7805 IC whose output is lastly put on to the Arduino board.
When mains exists the 14 V supply guarantees s continuous trickle charge supply to the connected battery via R1 as well as gives the Arduino borad by means of D1 and the 7805 IC.
Within this circumstances D1 cathode encounters a much higher potential than the cathode of D2 due a comparatively lower battery potential at D2 cathode.
The above circumstance maintains D2 reverse one-sided enabling the battery charge to stay blocked and pass only the adapter voltage to the Arduino board.
However the moment the mains provide fails, D1 immediately prevents carrying out and allows D2 to get forward not balanced to ensure that now the battery immediately requires over and starts providing the Arduino via the 7805 IC.

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Hey friends, Thanks a bunch for stopping by this site! I am an engineer with a Bachelor of Engineering in Electronics and Telecommunication. One of my passions is gathering information from all sorts of electronics books and tutorials. I then take that information and compile it into a language that is super easy to understand. My goal is to make those complex electronics circuit concepts and technical terms much more accessible for all the new and budding electronics engineers out there. I can also design customized circuit diagrams as required by the users.
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Comments

  1. admin says

    March 22, 2016 at 1:29 pm

    please use ohms law for it…”I” will be the battery charging current value

    Reply

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