Transcript a handbook of modern sensors MSI piezo manual

sensors for new
musical instruments
Roberto Aimi
typical controller
system
• sensors
• acquisition system (Icube, PIC, Basic
Stamp)
• mapping software (Max, PD, ?)
• output(?)
useful resources
• Fraden, a handbook of modern sensors
• MSI piezo manual
• acroname.com, infusion systems
($$$!!!!)
• Datasheets!
other favorite
resources
• Digi key
• American science and surplus
• smallparts.com
• Mcmaster-Carr / MSC industrial
catalogs
what to sense?
• position, velocity, acceleration, rotation
• temperature, light, sound
• pressure, torque, bending
• ON/OFF
•?
Switches
• discrete output
• toggle, normally on, off
• can provide visual and
tactile feedback
The hands -- Michel
Waisvisz
1984 - present
Roland TR-808
Potentiometers
• common
+Vref
Vout
types:
linear
taper,
audio taper
(log)
• rotary,
GND
linear,
multiturn
Variable resistors
R1
Variable resistor
V output
R2
Vout = Vref R2/(R1+R2)
Bend Sensor
FSR
• resistance drops when pressed
accelerometers
• inclination, acceleration
Rate Gyros
• Analog devices ADXRS410 or similar
• voltage output proportional to angular
velocity
IR distance sensors
Sharp GP2D12
(AKA the toilet sensor)
http://www.acroname.com/robotics/parts/R48-IR12.html
Qprox capacitive
sensing QT301
circuit
PWM to Analog
http://www.tigoe.net/pcomp/analogout.shtml
Devantech SRF04 Ranger
(acroname.com)
• pulse length
proportional to distance
Hall effect
Magnetic field sensors
Allegro 1321 linear
amplifier in chip!
Piezoelectric
materials
• PZT
• PVDF
excellent drum
triggers, contact
microphones
Musical controllers
derived from
pianos, organs
PerceptionProduction loop
Roland V-drums
Drum triggers
Korg Wavedrum
(Physical Modeling)
Typical percussion
controller
Simplified
convolution
instrument
but not too simple...
Simple example
simple drum pad
Some initial results
QuickTime™ and a
MPEG-4 Video decompressor
are needed to see this picture.
prototypes