Shoes that light up? No problem, these days you can buy (almost) anything. But it is of course much more fun and challenging to enhance a pair of shoes yourself with these trendy lights, using a clever little circuit and some LEDs.
Resistors
R1 = 47kΩ (SMD 0805)
R2,R3 = 10kΩ (SMD 0805)
R4 = 220Ω (SMD 0805)
P1 = 1MΩ preset
Capacitors
C1 = 470nF (SMD 0805)
C2,C3,C4 = 100nF (SMD 0805)
Semiconductors
D1-D18 = low-current LED
T1 = BC847 (SMD)
IC1 = 74HC(T)132 (SMD SO14)
IC2,IC3 = 74HC4017 (SMD SO16)
Miscellaneous
BT1 = 3V Lithium button cell
PCB, ref. EPS 070851-1
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