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]

Take Advantage of Amazon's Early Black Friday Deals on Tech, Kitchen Appliances, and More

Amazon
Amazon

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

Even though Black Friday is still a few days away, Amazon is offering early deals on kitchen appliances, tech, video games, and plenty more. We will keep updating this page as sales come in, but for now, here are the best Amazon Black Friday sales to check out.

Kitchen

Instant Pot/Amazon

- Instant Pot Duo Plus 9-in-115 Quart Electric Pressure Cooker; $90 (save $40) 

- Le Creuset Enameled Cast Iron Signature Sauteuse 3.5 Quarts; $180 (save $120)

- KitchenAid KSMSFTA Sifter with Scale Attachment; $95 (save $75) 

- Keurig K-Mini Coffee Maker; $60 (save $20)

- Cuisinart Bread Maker; $88 (save $97)

- Anova Culinary Sous Vide Precision Cooker; $139 (save $60)

- Aicook Juicer Machine; $35 (save $15)

- JoyJolt Double Wall Insulated Espresso Mugs - Set of Two; $14 (save $10) 

- Longzon Silicone Stretch Lids - Set of 14; $13 (save $14)

HadinEEon Milk Frother; $37 (save $33)

Home Appliances

Roomba/Amazon

- iRobot Roomba 675 Robot Vacuum with Wi-Fi Connectivity; $179 (save $101)

- Fairywill Electric Toothbrush with Four Brush Heads; $19 (save $9)

- ASAKUKI 500ml Premium Essential Oil Diffuser; $22 (save $4)

- Facebook Portal Smart Video Calling 10 inch Touch Screen Display with Alexa; $129 (save $50)

- Bissell air320 Smart Air Purifier with HEPA and Carbon Filters; $280 (save $50)

Oscillating Quiet Cooling Fan Tower; $59 (save $31) 

TaoTronics PTC 1500W Fast Quiet Heating Ceramic Tower; $55 (save $10)

Vitamix 068051 FoodCycler 2 Liter Capacity; $300 (save $100)

AmazonBasics 8-Sheet Home Office Shredder; $33 (save $7)

Ring Video Doorbell; $70 (save $30) 

Video games

Sony

- Marvel's Spider-Man: Game of The Year Edition for PlayStation 4; $20 (save $20)

- Marvel's Avengers; $27 (save $33)

- Minecraft Dungeons Hero Edition for Nintendo Switch; $20 (save $10)

- The Last of Us Part II for PlayStation 4; $30 (save $30)

- LEGO Harry Potter: Collection; $15 (save $15)

- Ghost of Tsushima; $40 (save $20)

BioShock: The Collection; $20 (save $30)

The Sims 4; $20 (save $20)

God of War for PlayStation 4; $10 (save $10)

Days Gone for PlayStation 4; $20 (save $6)

Luigi's Mansion 3 for Nintendo Switch; $40 (save $20)

Computers and tablets

Microsoft/Amazon

- Apple MacBook Air 13 inches with 256 GB; $899 (save $100)

- New Apple MacBook Pro 16 inches with 512 GB; $2149 (save $250) 

- Samsung Chromebook 4 Chrome OS 11.6 inches with 32 GB; $210 (save $20) 

- Microsoft Surface Laptop 3 with 13.5 inch Touch-Screen; $1200 (save $400)

- Lenovo ThinkPad T490 Laptop; $889 (save $111)

- Amazon Fire HD 10 Tablet (64GB); $120 (save $70)

- Amazon Fire HD 10 Kids Edition Tablet (32 GB); $130 (save $70)

- Samsung Galaxy Tab A 8 inches with 32 GB; $100 (save $50)

Apple iPad Mini (64 GB); $379 (save $20)

- Apple iMac 27 inches with 256 GB; $1649 (save $150)

- Vankyo MatrixPad S2 Tablet; $120 (save $10)

Tech, gadgets, and TVs

Apple/Amazon

- Apple Watch Series 3 with GPS; $179 (save $20) 

- SAMSUNG 75-inch Class Crystal 4K Smart TV; $998 (save $200)

- Apple AirPods Pro; $169 (save $50)

- Nixplay 2K Smart Digital Picture Frame 9.7 Inch Silver; $238 (save $92)

- All-New Amazon Echo Dot with Clock and Alexa (4th Gen); $39 (save $21)

- MACTREM LED Ring Light 6" with Tripod Stand; $16 (save $3)

- Anker Soundcore Upgraded Bluetooth Speaker; $22 (save $8)

- Amazon Fire TV Stick with Alexa Voice Remote; $28 (save $12)

Canon EOS M50 Mirrorless Camera with EF-M 15-45mm Lens; $549 (save $100)

DR. J Professional HI-04 Mini Projector; $93 (save $37)

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Netflix Viewers Are Petitioning the Streaming Giant to Stop Cutting Off the End Credits

"Wait! There might be a post-credits scene."
"Wait! There might be a post-credits scene."
JESHOOTS.com, Pexels

To help us decide what to watch next as easily as possible, Netflix always serves up a few suggestions immediately after we’ve finished a program. For many viewers, it’s a little too immediate: The credits shrink to a small window, and Netflix’s recommendations take center stage.

Composer Daniel Pemberton, whose most recent scores include Netflix original films Enola Holmes (2020) and The Trial of the Chicago 7 (2020), likened it to a rushed meal at a restaurant. “The second that final spoonful goes in your mouth the waiter runs over, noisily clears the plates away and shoves a new menu under your nose, while insisting that you order the set menu immediately,” he wrote for The Guardian.

While people do often walk away or switch to another program as soon as the credits roll, plenty of others consider them an important part of the viewing experience. The music alone justifies sitting tight for a little while longer, and the credits provide the perfect opportunity to contemplate whatever you’ve just seen. They also pay homage to the hundreds of people who brought the project to life. And, as the Marvel Cinematic Universe always reminds us, not all movies actually end when the credits start to roll.

Netflix doesn’t outright prevent viewers from watching the credits. If you click on the minimized box, the credits will spring back to full screen and remain there until the very end. But if you take too long fumbling for the remote, you might miss your chance—Netflix’s autoplay feature often begins the next preview in mere seconds, in which case you’d have to go back to your home screen and restart the previous program to see the credits.

A video producer named Mark Boszko got so fed up with the arrangement that he launched a petition on Change.org. He’s not asking Netflix to get rid of its end-of-program advertisements across the board; rather, he just wants the platform to let viewers choose to have the full credits play as their default setting.

Boszko’s petition is evidence that he’s far from the only person who cares about the cause. So far, more than 10,500 people have signed it—you can do so here.

[h/t The Guardian]