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Freezer meltdown magnet alarm circuit

2016-02-18 09:30  
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The meltdown of freezers that destroyed about one-third of the world’s collection of autism brain samples could cause a major setback for autism and other medical research around the globe.The meltdown is a magnet held to a small stand by ice. A reed switch is below the magnet.When the ice melts, the magnet falls on the switch, closing it, and completing the alarm circuit.Our freezer quit working in a quite spectacular fashion. Combine this with the door being left open a couple inches and it was not a pretty site that greeted me.
 

Freezer meltdown alarm