Is ghosting in keyboards an actual problem?

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So, the next time you're shopping for a keyboard, keep this in mind—and be sure the manufacturer's claims match up with real-world experience. He has been working in Transfer Learning, Gesture Recognition and Optical Character Recognition. Current also flows the wrong way through switch C1, then down through C2 and out of row 2. He loves optics, math, fluid dynamics, procam, tennis, media art, and anime so much.

During his free time, Sven enjoys sailing, tennis and travelling. And really, unless you're pracitally smashing your fist into your keyboard you really have to work to lose keypresses. Jay Meistrich Jay Meistrich — Research Software Development Engineer Jay Meistrich prototypes new hardware and software to improve human-computer interaction.

Is ghosting in keyboards an actual problem?

I've noticed an annoying problem... It gets in the way of gaming when you can't hold more than 3 keys down at a time. I have a Razer Tarantula for my main gaming desktop, and it's great because you can hold down up to something like 7 keys simultaneously. However, I'm going to be setting up about two, perhaps three more PCs in my basement, all capable of 2005 and older gaming, and I need to know what causes the 3-key limitation on some keyboards, and which keyboards don't have that limitation. It would definitely get in the way on all these PCs, as I'd probably have 2-3 friends over weekly to LAN it up. Imagine the keys are laid on a 2-D grid rows and columns. When you press a key, the controller sees the row and column of the key being pressed. Now imagine two keys being, pressed, both on the same row. You'll see the one row being signaled, and two columns being signaled. You can still determine which two keys are being pressed. Now imagine pressing a third key in a different row, but the same column as the first key. If all you can see is that two rows are being signaled and two columns are being signaled, it could be anything from 2-4 different keys depending on how you interpret it. Paul Miner, what you describe by itself would be ambiguous as soon as any two keys not in the same row were pressed. The key is that the keyboard is scanned. They controller circuit applies a signal to each row in turn, then looks at the columns signaled. Now, there is only a problem if two keys in the same column are pressed: when one row is energized, the current will flow through the two switches and energize the other row. Now, any third key in either row will light up when either row is energized, and it will look like the fourth key is also pressed. There are two ways to deal with this. Some keyboards use separate scan lines for the modifier keys so you can press at least any two keys plus any combination of modifiers. The other way is to put a diode in each key to prevent current from flowing backwards through a key and energizing a row that isn't being scanned. There may also be limitations of the controller chips, I don't know about that. If you are stuck with a keyboard that has ghosting problems, try tweaking your key bindings to avoid combinations that trigger it. © 2018 Condé Nast. Ars may earn compensation on sales from links on this site. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of Condé Nast.

His primary interest is in bringing the REAL world to the solo world and bringing computing to the REAL world. In his free time, Chong enjoys learning about new technology, playing Magic: The Gathering, video games, and spending time with friends and family. Jinha is exploring novel 3D, tangible, and gestural interfaces, as well as new visualization of the web and north data that afford these new interaction modalities. Previously, he received a B. He is interested in the intersection of engineering, science, design and human to invent new ways of interacting with computers. Daniel is working with virtual assistant concepts, including both external and interface design along with building servile prototypes.