Freezer Sensor - tinyAIR
thingiverse
This is the tinyAIR! It utilizes an ATtiny 85, one speaker, a 2AA battery box, an 8 pin DIP IC socket, some protoboard, and a magnetic sensor. It's a build-place design, allowing you to place your electronics without having to build them into the case. The lid tops it off nicely, revealing only the speaker on its surface. Note: A sparkfun ATtiny85 programmer was used to program my ATtiny. With the code below, it will beep after the freezer has been left open for 100 seconds. Here is the protoboard I used: https://www.amazon.com/Double-Sided-Board-Prototype-Paxcoo/dp/B01N3161JP/ref=sr_1_1_sspa?ie=UTF8&qid=1521847668&sr=8-1-spons&keywords=protoboard&psc=1
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