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28 Apr 2008

“If your freezer fails you may have meat or other frozen stuffs ready to eat. Re-freezing, not generally considered an option, may be an alternative for you, but may be also a risky business. While for a short time, a freezer should maintain an acceptable temperature to keep everything from beginning to defrost, it would be nice to know if the freezer contents have been compromised and for how long. For instance…power could be lost over that weekend you spent at the lake with the power returned several hours later. This exposes the contents to the ravages of spoiling without you even realizing it…”

PIC12F506 microcontroller reads temperature data from MAX6510 temperature sensor. As device is powered from batteries – temperature readings are performed periodically in order to save energy. Alarm system has some fancy algorithm which allows interpreting errors correctly. More information about operation and building you can find in downloadable word document. [via]

PIC based freezer failure alarm system – [Link]

One Response to “PIC based freezer failure alarm system”

  1. Freezer Failure Alarm based on the PIC Microcontroller - Hacked Gadgets - DIY Tech Blog Says:

    […] Electronics Lab, Embedded Projects   [link] [Trackback] […]

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