Capactive Touch Sensing
Posted by Matthew
My last project brought up the subject of capacitive touch sensing. You may not have realized this, but capacitive touch sensing is currently on the forefront of electronics. Mechanical touch sensors are known to wear and ‘push-less’ sensors are just cooler. In case you did not know, the scroll wheel on an Ipod uses an array of capacitive sensors along with the infamous touch lamp.

For the engineer in you, Planet Analog has a lengthy overview. Basically, you design a circuit that is highly dependent on the value of a small capacitor. The capacitance in a finger then causes a significant and detectable change in the circuits output.
The doorknob touch alarm functions in just this manner. It does its job, but is not as precise as more complex circuits. For more schematics, check out Discover Circuits. A recent article on DesignLine proposed that this interface be adapted to mobile phone keypads.

I’m a little late finding this article, but I loved it.
Do you love sports, do you feel like to look cool, i got a very awesome website here introduced by one of my friends. Very good website where you can find the Authentic nike shoes with latest and huge style of nike air max shoes and dunk sb shoes. I have bought from them for so many times, and very satisfied with the their goods and service.Such as Air max 1, air max 2, air max 90, nike air max 2009+, air max 2010 new, nike air max TN, nike air ltd trainers, air max 95.Air max 360 running shoes, nike shox shoes. Though their price are low, don’t worry about it’s quality.
Christmas is coming, go there to find presents for your friends or family. They are on sale, limited time!