元件BOM表：

R1 100 Ohm 1/4W Resistor

R2 470 Ohm 1/4W Resistor

R3 10k 1/4W Resistor

R4 100K 1/4W Resistor

R5 1K 1/4W Resistor

C1 47uF Electrolytic Capacitor

U1 78L05 Voltage Regulator

U2 LM339 Op Amp

L1 #47 Incandescent lamp with glass removed (See "Notes")

D1 LED

MISC Board, Wire, Sockets for ICs, etc.