Turn Any Surface Into a Touchpad With a Coat of Paint

If you can paint it, you can turn it into a touchpad. Researchers from Carnegie Mellon have developed a system, dubbed Electrick, that can make just about any surface touch-sensitive. As TechCrunch reports, Electrick uses conductive paint and electrodes sensitive enough to detect the slight changes in electrical flow caused by a person’s finger.

To make the technology work, the researchers employed a technique called “electric field tomography.” When your finger presses against a touch-sensitive surface, like the screen of a smartphone, it absorbs a small amount of charge from that device. Your phone uses electrodes to sense disturbances in its electric field, and Electrick does something similar. Electrodes set up around a surface coated with conductive paint are able to measure the voltage differences caused when someone’s finger comes in contact with it.

Electrick works on most surfaces: Plastic, wood, drywall, Play-Doh, and Jell-O are all compatible with it. The system can be used to replace volume controls on steering wheels, pedals on guitars, and light switches on walls.

One area where the technology falls behind is accuracy. Electrick isn’t as well-suited for writing or sketching as other touchpads, but with a margin of error of one centimeter it’s a fine alternative for simple buttons and sliders. The researchers hope the system’s relatively low cost will make it available to a wide audience. “Our technique is readily accessible to hobbyists, requiring no special chemicals, equipment or facilities,” the authors write in their report [PDF]. “Everything required can be readily purchased online."

[h/t TechCrunch]

The New Apple Watch SE Is Now Available on Amazon

Apple/Amazon
Apple/Amazon

Apple products are notorious for their high price tags. From AirPods to iPads to MacBooks, it can be difficult to find the perfect piece of tech on sale when you are ready to buy. Luckily, for those who have had their eye on a new Apple Watch, the Apple Watch SE is designed with all the features users want but at a lower starting price of $279— and they're available on Amazon right now.

The SE exists as a more affordable option when compared to Apple's new Series 6 line of watches. This less expensive version has many of the same functions of its pricier brethren, except for certain features like the blood oxygen sensor and electrical heart sensor. To make up for the truncated bells and whistles, the SE comes in at least $120 cheaper than the Series 6, which starts at $400 and goes up to $800. The SE comes with technical improvements on previous models as well, such as the fall detection, a faster processor, a larger screen, water resistance, and more.

Now available in 40mm ($279) and 44mm ($309), both SE models offer a variety of colors to choose from, such as sliver, space gray, and pink. If you want cellular connection, you’ll have to pay a bit more for the 40mm ($329) and the 44mm ($359).

For more, head to Amazon to see the full list of offerings from Apple.

This article contains affiliate links to products selected by our editors. Mental Floss may receive a commission for purchases made through these links.

The New Apple Watch SE Is Now Available on Amazon

Apple/Amazon
Apple/Amazon

Apple products are notorious for their high price tags. From AirPods to iPads to MacBooks, it can be difficult to find the perfect piece of tech on sale when you are ready to buy. Luckily, for those who have had their eye on a new Apple Watch, the Apple Watch SE is designed with all the features users want but at a lower starting price of $279— and they're available on Amazon right now.

The SE exists as a more affordable option when compared to Apple's new Series 6 line of watches. This less expensive version has many of the same functions of its pricier brethren, except for certain features like the blood oxygen sensor and electrical heart sensor. To make up for the truncated bells and whistles, the SE comes in at least $120 cheaper than the Series 6, which starts at $400 and goes up to $800. The SE comes with technical improvements on previous models as well, such as the fall detection, a faster processor, a larger screen, water resistance, and more.

Now available in 40mm ($279) and 44mm ($309), both SE models offer a variety of colors to choose from, such as sliver, space gray, and pink. If you want cellular connection, you’ll have to pay a bit more for the 40mm ($329) and the 44mm ($359).

For more, head to Amazon to see the full list of offerings from Apple.

This article contains affiliate links to products selected by our editors. Mental Floss may receive a commission for purchases made through these links.