元件BOM表：

P1-P2 = 47K
R1-R2 = 1K
R3-R4 = 270R
R5-R6 = 100R/1W
R7-R8 = 22R/5W
C1-C2 = 0.47uF
Q1-Q2 = BC547
Q3-Q4 = BC558
Q5-Q6 = BD140
Q7-Q8 = 2N3055
SW1 = On-Off Switch
T1 = 230V AC Primary 12-0-12V
4.5A Secondary Transformer
B1 = 12V 7Ah