The whole brain of the operation. It's the black speck, not the loupe.Soldered onto an adapter so it's at least holdable with human fingersFirst light — before any of the four modes existedThe real board design, fish mascot included at no extra chargePaper schematic, plastic battery holder, same afternoonThe first board that actually worked, all three LEDs litA few rounds of "will this need a forest of supports or not"Fifty boards, two filament colors, zero paintbrushes