LED firefly Jars

There's a nice charm to fireflies in a jar—except for, you know, all the dead bugs afterwards. I decided to make a bunch of fake fireflies in real jars for decoration at an outdoor event. The fireflies are yellow LEDs controlled by a small ATtiny45 microcontroller. The control circuit board sits out of sight on the underside of the jar lid and the LEDs hang down on thin wire. Designing It I started the proj ...

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