64 synchronizing fireflies. It sounds like a line from some overly-clever children’s book or a Christmas carol. But it was instead a little week-long project for Alex at Tinkerlog. He writes:

Last week, I invested some time to solder 64 Firefly boards. Only 2.432 solder joints later, I was ready for some videos.

Every firefly acts completely autonomously, it has its own tiny controller, eye and luminary. They are all connected for power supply only.

And a partridge in a pear tree.

64 Synchronizing Fireflies