For those of you who like the feel of a knob in your hands ( we couldn‚Äôt help it ) ds_LABS has created a knob for your iPhone screen. Who thinks of these things? The knob will allow you to go all analog and ultimately defeat the point of even having a touchscreen in the first place, but still we digress…
It uses same principles people have used to create touchscreen-friendly styluses. The knob lets you rotate objects on the iPhone/iPod Touch/iPad/iYo Mama by rotating the knob while it‚Äôs sitting on the screen.
We‚Äôre not really sure what the point is other than it looks fun, and is kinda cracky, but what the heck. WE LIKE IT. You might even call it steampunk, is that still a thing?
Using a small to medium sized knob, you can modify it (or even use it by itself) to behave as a rotary input.
Similar to the soft stylus, the trick is finding a way to create a conductive path from your hand to the screen. We started by using copper tape, conductive fabrics (see the soft stylus) and wires to simulate two touch points on opposite sides of the knob. It takes some careful tuning to get the touch points spaced correctly and sized such that the screen reads them as a touch, but it does work with a little patience.
Alternatively, with a small knob, it‚Äôs natural to grab it such that your fingers actually touch the screen making it nothing more than a physical prop to provide some tactile feedback. It works great and doesn‚Äôt require much in terms of materials or time; just grab a small object and give it a try!