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Post-It note can become E-ink

Post-It note can become E-inkImagine tossing all of the reminders scattered across your desk and instead having your phone send a to-do list to a scrap of e-paper that never needs charging. That’s essentially what Microsoft Research has done with this cute Polaroid-esque display, MIT Technology Review reports.

According to a paper presented at the User Interface Software and Technology conference this week, the device uses a small photovoltaic cell, which harvests energy from ambient light, to power a simple e-ink display and low-energy Bluetooth chip. E-ink, now more than a decade old, is particularly well-suited to such applications because it only uses power when it changes what’s shown on the display.

Speaking to New Scientist, Tobias Grosse-Puppendahl from Microsoft Research said that the device “could be used just like a Post-It note [that] could be reused, synchronized with notes in other locations, and could be programmed to show up-to-date information.” When the lighting conditions in the room are optimal, the device is able to receive an update from a computer or smartphone and refresh its display every minute. Hopefully that’s faster than the accretion rate of your to-do list.

There’s growing activity in the development of devices that can gather power from their surroundings. At this year’s EmTech MIT 2016, Shyam Gollakota, an assistant professor at the University of Washington, showed off a contact lens that’s able to connect to other devices using Wi-Fi despite not containing a power supply. Its secret is a new approach which harnesses energy from radio signals in the air.

Such advances will be required if the much-fabled Internet of things is to prove genuinely useful. They might even make you more organized along the way.
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