Thursday Week 5: Piezo Buzzers Theory and Practice of...
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Thursday Week 5: Piezo Buzzers 1 Theory and Practice of Tangible User Interfaces Output 1: Making Sound Piezo buzzers week 05
Transcript of Thursday Week 5: Piezo Buzzers Theory and Practice of...
Thursday Week 5: Piezo Buzzers
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Theory and Practice of Tangible User Interfaces
Output 1: Making SoundPiezo
buzzers
week 05
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Piezo
Buzzer
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Piezo
Buzzer
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Piezo
Buzzer
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period
PW
PW
period
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Frequency (Hz) = Period (sec)
1
period
PW
* note frequency period PW (timeHigh)
* c 261 Hz 3830 1915 * d 294 Hz 3400 1700 * e 329 Hz 3038 1519 * f 349 Hz 2864 1432 * g 392 Hz 2550 1275 * a 440 Hz 2272 1136 * b 493 Hz 2028
1014* C
523 Hz 1912 956
PW
period(microseconds)
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period
PW
PW
period
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Theory and Practice of Tangible User Interfaces
1. Connect your piezo
buzzer 2. Play sound
3. Make a Theremin 4. Solder wires to a motor (for next Thursday)
In Class Exercise
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1. Connect your piezo
buzzer
Polarity matters!
black = ground
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Theory and Practice of Tangible User Interfaces
1. Connect your piezo
buzzer 2. Play sound
3. Make a Theremin 4. Solder wires to a motor (for next Thursday)
In Class Exercise
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2. Play Soundsound_serial
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c d e f g a b C
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2. Play Soundplay_melody
If you want to make it quieter, add a resistor.
10k
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c d e f g a b C
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Theory and Practice of Tangible User Interfaces
1. Connect your piezo
buzzer 2. Play sound
3. Make a Theremin 4. Solder wires to a motor
(for next Thursday)
In Class Exercise
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Theory and Practice of Tangible User Interfaces
Theremin (by Leon Theremin)
Measures the body’s electric field.
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Theory and Practice of Tangible User Interfaces
Your Theremin
theremin
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Theory and Practice of Tangible User Interfaces
1. Connect your piezo
buzzer 2. Play sound
3. Make a Theremin 4. Solder wires to a motor
(for next Thursday)
In Class Exercise
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Theory and Practice of Tangible User Interfaces
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Theory and Practice of Tangible User Interfaces
c d e f g a b C
Let’s try to make beautiful music!
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HomeworkInput output coincidence exercise. Design an artifact where both
input and output occur at the same place. Use any combination of your input transducers and output transducers (pot, photocell, FSR, LEDs, piezo, screen). E.g., a ball that changes colors and/or plays different
sound/melody depending on the pressure being applied. A stick you can twist to color or sound differently…
These are just examples to spark your imagination. Be creative!
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AnnouncementProgramming course by Dave and Ryan TODAY
Thursday, Sept 27, 2007 6:00PM in 110 South Hall
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Theory and Practice of Tangible User Interfaces
Thanks!
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Show and Tell!
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Map as an Indexical Sign?
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Signs
in Context of Use
to represent “cold weather”
== Indexical
to represent “snow flake”
== Iconic
to represent “GO for ski”
== Symbolic
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Signs
in Context of Use
Indexical
Pointing to the location of things
IconicRepresenting directional relations and distances between landmarks
Symbolic
Conventional symbols that must be learned
