R1_____________500K 1/2W Trimmer
R2______________22K 1/4W Resistor
R3,R5,R7,R9_____10K 1/4W Resistors
R4,R6,R8,R10_____4K7 1/4W Resistors
R11,R12,R13____470R 1/4W Resistors
R14____________270R 1/4W Resistor
C1_______________4µ7 25V Electrolytic Capacitor
C2_____________220µF 25V Electrolytic Capacitor
D1–D17________LEDs Any type and color (except blue and white)
Q1,Q2,Q3,Q4___BC337 45V 800mA NPN Transistor
IC1____________4093 Quad 2 input Schmitt NAND Gate IC
IC2____________4520 Dual binary up-counter IC
IC3____________4094 8-stage shift-and-store bus register IC
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