4/18/2023 0 Comments Multitouch tischIt’s available as an MP4 download on this page. It’s plenty to get your mind rolling, but if you want to know more you must watch his thesis presentation. Some of his example devices include gaming controller overlays, encoder rings, and multiple stylus designs.Īfter the break we’ve embedded teaser trailer which jumps through several demonstrations. This lets the capacitive sensing screen detect the presence of your hand, through the conductor. The input devices use conductive material to complete a path between your hand and your screen. The output devices generally rely on light and color of light displayed on the screen itself which is picked up by a light sensor. What he’s come up with are devices for both input and output. He managed to augment the usability of touchscreen devices by adding hardware to them. is working on his thesis for the ITP graduate program at the Tisch School for the Arts. Posted in Fail of the Week Tagged AD8302, fail of the week, filter, fotw, harmonics, RF, thesis, vector network analyzer, vnaįanboys may be in shock from seeing duct tape applied to the screen of an iPad, but we can assure you it’s in the name of science. We understand ’s disappointment, but there were a lot of wins here, from the excellent build quality to the top-notch documentation. Ambitious, perhaps, but with a spate of low-cost VNAs coming on the market, we can see where he got the inspiration. Confounding these issues was the time constraint might well have gotten the issues sorted out had the clock not run out on the school year.Īfter reading through ’s description of his project, which was a final-year project and part of his thesis, we feel like his rating of the build as a failure is a bit harsh. He has a complete analysis of the failure modes in his thesis, but the short story is poor filtering of harmonics from the local oscillator, unexpected behavior by the AD8302 chip at the heart of his design, and calibration issues. Unfortunately, found the performance of the completed VNA to be wanting, especially in the phase measurement department. decided to port a lot of functionality for his low-cost VNA to a host computer and concentrate on the various RF stages of the design. At least that’s the lemonade made from his lemon of a low-cost vector network analyzer.įor the uninitiated, a VNA is a versatile test instrument for RF work that allows you to measure both the amplitude and the phase of a signal, and it can be used for everything from antenna and filter design to characterizing transmission lines. A complex project with a lot of subsystems has a greater chance of at least partial success, as well as providing valuable lessons in what not to do next time. Full project source will be linked at the end.If you’re going to fail, you might as well fail ambitiously. To get the most out of the examples you should be familiar with setting up an Activity and the basics of the Android UI system. It will cover creating a custom View that responds to touch events and allows the user to manipulate an object drawn within it. This post is going to be heavy on code examples. Whatever you decide to call it, today we’re going to look at how to make your apps and views behave nicely with multiple fingers on the screen. For some it’s about hardware capability, for others it refers to specific gesture support in software. The word “multitouch” gets thrown around quite a bit and it’s not always clear what people are referring to.
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