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Programmable LED Circle

Arduino compatible

Programmable LED Circle
During the darker days we're very keen to light things up a bit. (Christmas) lights are sprouting from the ground like mushrooms. This programmable LED circle fits perfectly in this picture, but is, of course, also suitable for other occasions. We already have Mardi Gras in mind...
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Component List
R1–R4 = 470Ohm
R5,R6,R7 = 10kOhm
C1,C2 = 22pF 50V, 2.5mm pitch
C3 = 10nF 50V, 2.5mm pitch
D1 = 1N4007
IC1 = ATmega328P, programmed, Elektor Store # 150455-41
LED1–LED32 = LED, 5mm, high efficiency, 2.5mm pitch
K1 = 6-pin (2x3) pinheader, vertical, 2.5mm pitch
S1,S2 = pushbutton 24V, 50mA, 6x6mm
X1 = 16MHz quartz crystal
Button cell holder for 2 x CR2032
Socket for IC1, DIP-28, narrow
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