R1, R4

2

2.2K 1/4W Resistor

R2, R3

2

4.7K 1/4W Resistor

R5

1

1K 1/4W Resistor

R6

1

1.5K 1/4W Resistor

R7

1

33K 1/4W Resistor

R8

1

10K 1/4W Resistor

C1,C2

2

0.1uF Ceramic Disc Capacitor

C3

1

470uF 25V Electrolytic Capcitor

D1

1

1N914 Diode

D2

1

1N4004 Diode

D3

1

12V 400mW Zener Diode

Q1, Q2, Q4

3

BC547 NPN Transistor

Q3

1

BD679 NPN Transistor