Inkjet-printed onto a thin substrate of PET (polyethylene terephthalate) plastic in less than a minute, and then adhered to the skin anywhere on the body, Multi-Touch Skin can be made in any two-dimensional shape. It incorporates two stacked layers of electrodes arranged in rows and columns, forming a grid. In its current form, each piece of the Skin is hard-wired to a touch-controller microchip, which is in turn connected to a tiny battery-powered Raspberry Pi Zero microcomputer.
That chip constantly measures the electrical capacitance at every intersection within the grid of electrodes. When the user touches the Skin at a given location, their fingertips conduct electricity, allowing the charge to drain away at that intersection (the insulating bottom layer of the Multi-Touch Skin keeps the user’s underlying skin from having an effect). The chip detects that change in capacitance, and registers it as a touch in that location – it can do so for multiple touches simultaneously.
The resulting signals are wirelessly transmitted to separate electronic devices, causing them to do different things depending on the type of touch detected.
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!
8-6-2021 (August 6, 2021) is the Snakiest day of the year and it’s also this year’s CircuitPython Day! The day highlights all things CircuitPython and Python on Hardware. See you there!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.