Make Electronics

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Experiment 30: Fuzz

0.15uF

1uF

1K

0.15uF

0.22uF

820

100uF

NP

8 ohms

100uF

100uF

NP

100uF

100uF

1

2

3

4 13

14

15

16

5

6

7

8 9

10

11

12

9V

DC

100uF

TEA2025B

1

2

3

4 5

6

7

8

555

timer

1K

100K

100K

33K

8K2 390

0.01uF

0.01uF 0.1uF

0.1uF

Audio Signal

input point

Figure 5-55. For a quick demo of clipping, insert a couple of transistors between the output
from the 555 timer and the input of the amplifier chip. One transistor overdrives the
other, so that when you adjust the potentiometer at the center of the circuit, you hear an
increasingly harsh, distorted sound.