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2.77 Jimi Hendrix sound generator
Circuit 164: Jimi Hendrix sound generator
Setup information
Install the two transistors, the diode, the five resistors and the three electrolytic capacitors as shown in
Fig. 2.194.The eleven jumper wires come next. Last but not least connect the Piezo element. Check the
placement on the board again and only then connect the battery. You can significantly increase the sensitiv-
ity of the Piezo element by using a sound plate or even a sound box. Read more about it in Chap. 1.2.3
Experiment
Our circuit is nothing but a pretty lousy AF amplifier. Lousy means that it will generate intentionally
extremely strong distortions. Good quality audio amplifiers are after all supposed to avoid distortion as
much as possible. With this circuit on your guitar pedal, you can produce a heavily distorted sound that
reminds us of the legendary Jimi Hendrix.
The circuit diagram for this experiment is shown in Chap. 3, Fig. 3.164.
Components required:
2 x 2N3904 transistors,
1 x green LED,
1 x 1 kΩ resistor,
4 x 22 kΩ resistors,
2 x 10 μF electrolytic
capacitors, 1 x 100 μF
electrolytic capaci-
tor, 1 x Piezo element,
1 x breadboard, 1 x 9V
battery with clip con-
nector
Fig. 2.164: Jimi Hendrix
sound generator
189
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