ATTiny85 and LR44 holder
thingiverse
This is essentially an amalgamation of various components designed to house a single ATTiny85 microcontroller and three tiny LR44 hearing-aid batteries. We managed to acquire a substantial quantity of expired Duracell 675s at a garage sale, so I created this assembly to help us utilize those batteries efficiently. Three seems like the perfect number to power an ATTiny and a few LEDs simultaneously. I initially used it as the battery/microcontroller pack for an LED necklace running a flickering Arduino sketch, and it was secured to the back of my neck. I'm also planning to repurpose it on a hairclip to serve as a pack for some earrings, but that project remains unfinished... This assembly should be compact and light enough to be attached to a poster or diorama to control sensors and lights, or in numerous wearables applications. https://youtu.be/uhzlKe-_Jws
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