Table of Contents
Advertisement
2.50 Trill generator
Circuit 113: Trill generator
Setup information
Install the transistor, the seven resistors and the three ceramic capacitors and the electrolytic capacitors
as shown in Fig. 2.113 The twelve jumper wires come next and then the jumper, which will function as a
switch (shown dashed). For your guidance, we labelled the "switch" with "Start". We don't need the Piezo
element this time. Check the placement on the board again and only then connect the battery.
Experiment
If everything is wired correctly, the "switch" is open, which means that one end of our jumper wire is not
connected. "Close" the jumper marked START for a moment. Only when the »switch« is open again, the
Piezo element emits a sound that slowly fades away.
The circuit diagram for this experiment is shown in Chap. 3, Fig. 3.113.
138
Components required:
1 x 2N3904 transistor,
1 x 220 Ω resistor,
1 x 1 kΩ resistor,
2 x 10 kΩ resistors,
2 x 100 kΩ resistors,
3 x 10 nF ceramic capaci-
tors, 3 x 10 μF electrolytic
capacitors, 1 x Piezo
element, 1 x breadboard,
1 x 9V battery with clip
connector
Fig. 2.113: Trill generator
Advertisement
Table of Contents
