Here's a simple example that uses frame differencing to calculate the total amount of motion seen by a camera, and uses that one parameter to control some audio.
Don Lancaster's Tech Musings March, 1999
This website from Perry can calculate various electronics values. Click on Calculators.
If you're deciphering capacitor codes the following are very helpful:
- Capacitance Unit Converter
- Capacitor Code Calculator
A garment that shocks anyone who touches it.
The garment hides a nine-volt battery, a wire mesh and an electric circuit with a switch at the waistband. The electric device weighs 450 gms and can be easily removed from the jacket.
via wmmna
here's a patch I made for doing video background subtraction (differencing). It's commented and should be fairly easy to use. The principle is that the video stream is compared with a background captured frame and anything different from that frame is made white. Useful for separating your subject from the background for tracking/interaction.
binary file (mac)
text file (windows)
Found some cheap capacitive touch sensors online ($1.97, functionality similar to theremins. page 288 of Physical Computing). I'm not sure how sensitive it is (listed as: extremely sensitive). Ideally I'd like it to operate like a theremin in that you can be fairly far away from it and get a change in capacitance. Perry seems to think that the size of the sensor you attach to circuit may affect the range. Going to order some and experiment to see. I'm thinking about creating an array of them and imbedding them in a sculpture/instrument. Would like to couple them with force sensors as well, but those are more expensive:
SlideLong (strip force sensor) $32
SlideWide (wacom like pad, 1 dimensional, can be 2d if you sandwich one on top of the other and rotate 90 degrees) $64.