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材料BOM表：

R1,R2_______________4K7 1/4W Resistors
R3_________________22K 1/4W Resistor
R4__________________1M 1/4W Resistor (See Notes)
R5__________________2M2 1/4W Carbon Trimmer (See Notes)
R6,R10,R11,R14,R15_10K 1/4W Resistors
R7,R8______________47K 1/4W Carbon Trimmers (See Notes)
R9,R13_____________27K 1/4W Resistors
R12,R16____________56R 1/4W Resistors
C1__________________1µF 63V Polyester Capacitor
C2________________100µF 25V Electrolytic Capacitor
D1-D4 etc._________5 or 3mm. LEDs (any type and color) (See Notes)
IC1_______________LM358 Low Power Dual Op-amp
Q1,Q2,Q4__________BC327 45V 800mA PNP Transistors
Q3,Q5,Q6__________BC337 45V 800mA NPN Transistors
SW1________________SPST miniature Slider Switch
B1___________________9V PP3 Battery / Clip for PP3 Battery