77
Circuit 52:
Stimulating mantel clock
Setup information
Install the two transistors, the three resistors and the two electrolytic capacitors as shown in
Fig. 2.52.
The
five 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 sensitivity of the Piezo element by using a sound plate or even a sound
box. Read more about it in Chap. 1.2.3
Components required:
1 x 2N3904 transistor,
1 x 2N3906 transistor,
1 x 22
Ω
resistor, 1 x 1 k
Ω
resistor, 1 x 100 k
Ω
resis-
tor, 2 x 10 μF electrolytic
capacitors, 1 x Piezo ele-
ment, 1 x breadboard,
1 x 9V battery with clip
connector
Fig. 2.52:
Stimulating mantel
clock
Experiment
This circuit delivers an acoustic sound similar to the ticking of a mantel clock. In our case the repetition rate
is approximately one beat per second. If your room is not filled with other loud noises, the ticking of the
clock will contribute to your sense of wellbeing. The beat is stimulating. This, however, we cannot guaran-
tee.
The circuit diagram for this experiment is shown in Chap. 3, Fig. 3.52.
Summary of Contents for ELECTRONICS EXPERIMENTS BOX
Page 4: ......
Page 265: ...267 Fig 3 56 Cir cuit 56 Audio limiter Fig 3 57 Circuit 57 Amplifier for a storm detector...
Page 269: ...271 Fig 3 64 Circuit 64 Stabilizer for 1 9 V Fig 3 65 Circuit 65 Stabilizer for 2 5 V...
Page 275: ...277 Fig 3 80 Circuit 80 Quiztimer 30 seconds Fig 3 81 Circuit 81 Handy diode tester...
Page 315: ...317 Fig 3 179 Circuit 179 HF generator 150 kHz Fig 3 180 Circuit 180 HF generator 420 kHz...
