Betzold 89211 Mode D'emploi page 60

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13. Amplifier-IC creates Vibration through Feedback
303. Contact-operated roaring sound
Close the slide switch (15). Touch the switch surface (12), possibly with
a wet finger. A roaring sound is heard from the loudspeaker (20).
304. Light-operated roaring sound
Replace the contact switch (12) with the photo-sensor (16). When light
falls on this, a roaring sound is heard from the loudspeaker (20).
305. Hand-operated roaring sound
Replace the contact switch (12) with the pressure switch (14). On
operating this, a roaring sound is heard from the loudspeaker (20).
306. Light-operated sound of vibrations
Close the slide switch (15). On the incidence of light, the sound of
vibrations is heard from the loudspeaker (20).
307. Moisture-operated sound of vibrations
Replace the photo-sensor (16) with the humidity switch (12). When
moisture touches the switch surface (12), the sound of vibrations is
heard from the loudspeaker (20).
308. Loud roaring sound
Replace the photo-sensor (16) with the sound transducer (11). Close the
slide switch (15). A loud roaring sound is heard from the loudspeaker
(20).
309. Hand-operated sound of vibrations
Replace the loudspeaker (20) with the sound transducer (11) and the
photo-sensor (16) with the pressure switch (14). Press this. the sound of
vibrations is heard from the sound transducer (11).
310. Light-operated sound of vibrations with higher volume
Replace the loudspeaker(20) only with the sound transducer (11). On
the strong incidence of light, the sound of vibrations is heard from the
sound transducer (11).
311. Contact-operated sound of vibrations with higher volume
Replace the photo-sensor (16) with the contact switch (12). On contact
a sound of vibrations is heard from the sound transducer (11).
312. Hand-operated sound of vibrations with higher volume
Replace the photo-sensor (16) with the pressure switch (14). Press this
and a sound of vibrations is heard from the sound transducer (11).
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