Current Iteration of the Chamber

tech links
Acroname SRF08
Devantech specs for SRF08
serial to DMX converter
DMX module pdf
American DJ's mega strobe

code
ultrasonic28.bas
ultrasonic26.bas
serial_dmx_test.bas
ultrasonic25.bas
ultrasonic24.bas
ultrasonic23.bas
ultrasonic22.bas
ultrasonic17.bas
ultrasonic16.bas
ultrasonic15.bas
ultrasonic14.bas
ultrasonic13.bas
ultrasonic12.bas
ultrasonic11.bas
ultrasonic10.bas
ultrasonic09.bas
ultrasonic08.bas
ultrasonic07.bas
ultrasonic06.bas
ultrasonic05.bas
ultrasonic04.bas
ultrasonic03.bas
ultrasonic02.bas
ultrasonic01.bas

Burning Man

deadline: Aug 9, 2003
strobes: 6
strobes hung between 6-8 ft up
scaffolding: 10ft high
dome diameter: 20ft
dome height: 16-18ft
30-50 ft from the camp
motion sensors are triggered by people walking around the inside of dome, not by walking in and out

sound specs
sound travels at 1120 ft/sec
at 20 feet ultrasonics will travel at the fastest of 40 ms to the wall and back
we have to sample each sensor separately so that we differentiate between sensor signals
it will take 240ms or 1/4 a second to sample 6 ultrasonics sensors
so we would get 4 samples of 6 ultrasonics per second (4 Hz/sec)
must also factor in the weather there--desert, temp. humidity, barometric pressure

ultrasonic range finders
Acroname SRF08
Devantech specs for SRF08
viewing angle: 30 °
viewing distance: 3cm to 18ft

Acroname SRF04
Devantech specs for SRF804
viewing angle: 30 °
viewing distance: 3cm to 8.5ft

Polaroid transducer specs

Polaroid 600 series electrostatic transducer
Polaroid 600 package

Polaroid 7000 series electrostatic transducer
Polaroid 7000 series package (includes 6500 package)

article on ultrasonic range finders

motion sensors
radio shack motion detector ($20)

viewing angle: 100 °
viewing distance: 19.6-30ft max (depends on angle, for example at 90 ° in either direction the max distance is 19.6ft, and at 45 ° it's 30 ft)
68 ° F
uses passive infrared
needs 9V

radio shack wireless motion detector

infrared sensors
Eli, Ilona & Olivier's IR research
Sasha Harris-Cronin & Scott Wolynski's fuzzball project notes
viewing angle: ?
viewing distance: 15 ft

dmx stuff
serial to DMX converter
DMX module pdf
American DJ's mega strobe

Here are some links I got from Tom Igoe's notes on sensors
general notes on sensors
dc proximity sensors