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Ryan writes - "Capacitive sensors have historically been regarded with fear and hostility among hobbyists. They're notoriously flaky, unreliable, and difficult to design. Further, they traditionally fall in the "analog domain" which is something the casual microcontroller hobbyist can sometimes wince at. They usually require fancy shielding, and are unsettlingly sensitive to changes in things like temperature, humidity, air pressure, cosmic radition, my girlfriends feelings, and the mushroom kingdom stock market index.
I've found lately though that capacitive detection doesn't have to be so scary. With a few simple design rules and a little signal processing, you can do some immensely cool stuff with basically no effort at all. (And as many parts!) This project is just one simple example. There are all sorts of ways you could couple a theremin-like antenna set up with some signal processing to produce fun results. I hope to try more of them!" - Link.
A qProx Chip accounts for much of the above and works well.
I believe their Q113 model would work for similar to this.
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My comment is slightly off topic, but I've been installing lights in my house with no switch - I use the touch-light switches for lamps and installing them in the wall box. Very cool idea - we have nice wall-sconce lights around the house that you just touch and they turn on to 3 levels of brightness. If you go to Lowe's / Home Depot, they have the replacement switch near the Lighting section. They replace the ground wire with a control wire that responds to you touching metal on the wall light.
Its' also very useful for older houses that have hardwired lights and no wall switch.
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And more on-topic - SWEET project dude! That thing is impressive!
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thankyou
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thankyou
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Is there a scematic somwhere?
Thanks
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