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B: With Sound Transducer (much quieter)
C: With Sound Transducer and Visual Display
D: Other Applications
All manuals and user guides at all-guides.com
178. Magnet-operated, quiet roaring sound
Move a magnet in the vicinity of the reed switch (13). The quiet sound of
a spacecraft is heard from the sound transducer (11).
179. Light-operated, quiet roaring sound
Replace the reed switch (13) with the photo-sensor (16). When light
falls on this, the quiet sound of a spacecraft is heard from the sound
transducer (11).
180. Hand-operated, quiet roaring sound
Replace the reed switch (13) with the pressure switch (14). Press this
and the quiet sound of a spacecraft is heard from the sound transducer
(11).
181. Tapping-operated, quiet roaring sound
Tap on the base plate and the quiet sound of a spacecraft is heard from
the sound transducer (11).
182. Contact-operated, quiet roaring sound
Replace the vibration switch (10) with the contact switch (12). Touch the
contact surface and the quiet sound of a spacecraft is heard from the
sound transducer (11).
183. Magnet-operated motor generates the roaring sound
Remove the sound transducer (11). Keep the motor (24). Move a
magnet close to the reed switch (13). The motor generates the quiet
sound of a spacecraft (11).
184. Light-operated roaring sound with visual display
When the photo-sensor (16) is sufficiently illuminated (for example, LED
and additional battery) and the contact switch (12) is used, the sound of
a spacecraft is heard and the lamp (18) lights up.
185. Magnet-operated roaring sound with visual display
Replace the photo-sensor (16) with the reed switch (13). When a
magnet comes close to the reed switch and the contact switch(12) is
operated, the sound of a spacecraft is heard and the lamp (18) lights up.
186. Hand-operated roaring sound with visual display
Replace the photo-sensor (16) with the pressure switch (14). When this
is pressed and the contact switch(12) is used, the sound of a spacecraft
is heard and the lamp (18) lights up.
187. Simple demonstration of a Morse telegraph
Press the pressure switch (14) for different lengths of time. The LED
lights up. The combination of the different lengths corresponds to
different characterers.
188. Rain detector
Replace the resistor (30) with the humidity switch (12). On contact with
a moist fingertip the sound of a spacecraft is heard. The same thing
would happen if a tiny drop of water were to fall on the contact surface.
– 51 –
© Arnulf Betzold GmbH
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