Grab your friends and family, and tune in to YouTube.com/TED for the Countdown Global Launch this Saturday, October 10, 2020 at 11am ET.
TED’s first-ever free conference, the Global Launch kicks off Countdown, a global initiative to champion and accelerate solutions to the climate crisis. This weekend’s virtual event will explain why the climate crisis is so urgent, share ideas from experts in a range of fields and call on leaders and citizens everywhere to take action. Expect a day packed with more than 50 speakers, activists, actors and musicians in five curated sessions of actionable and science-backed ideas paired with moments of wonder, inspiration and optimism.
This special event will feature hosts Jane Fonda, Priyanka Chopra Jonas, Chris Hemsworth, Mark Ruffalo, Don Cheadle, Al Gore, Xiye Bastida, Prajakta Koli, Hannah Stocking and Jaden Smith; and speakers Prince William, His Holiness Pope Francis, Monica Araya, Jesper Brodin, Dave Clark, Christiana Figueres, Kara Hurst, Lisa Jackson, Rose M. Mutiso, Johan Rockström, Nigel Topping, Ursula von der Leyen and many more; with special musical performances by Prince Royce, Sigrid and Yemi Alade.
The Countdown Global Launch, presented by TED and Future Stewards, will run from 11am – 5pm ET. Segments from the event, including the biggest talks and performances, will be made available immediately across TED’s digital platforms.
James Bruxton (or @xrobotosuk on Instagram) built an IoT-controlled e-paper message board using Raspberry Pi. Updating it is easy: just edit a Google sheet, and the message board will update with the new data.
Harnessing Google power
This smart message board uses e-paper, which has very low power consumption. Combining this with the Google Docs API (which allows you to write code to read and write to Google Docs) and Raspberry Pi makes it possible to build a message board that polls a Google Sheet and updates whenever there’s new data. This guide helped James write the Google Docs API code.
James’s original plan was to hook up his Raspberry Pi to a standard monitor and use Google Docs so people could update the display via mobile app. However, a standard monitor consumes a lot of power, due to its backlight, and if you set it to go into sleep mode, people would just walk past it and not see updates to the list unless they remember to wake the device up.
Enter e-paper (the same stuff used for Kindle devices), which only consumes power when it’s updating. Once you’ve got the info you want on the e-paper, you can even disconnect it entirely from your power source and the screen will still display whatever the least update told it to. James’s top tip for your project: go for the smallest e-paper display possible, as those things are expensive. He went with this one, which comes with a HAT for Raspberry Pi and a ribbon cable to connect the two.
The HAT has an adaptor for plugging into the Raspberry Pi GPIO pins, and a breakout header for the SPI pins. James found it’s not as simple as enabling the SPI on his Raspberry Pi and the e-paper display springing to life: you need a bit of code to enable the SPI display to act as the main display for the Raspberry Pi. Luckily, the code for this is on the wiki of Waveshare, the producer of HAT and display James used for this project.
Making it pretty
A 3D-printed case, which looks like a classic photo frame but with a hefty in-built stand to hold it up and provide enough space for the Raspberry Pi to sit on, is home to James’s finished smart to-do list. The e-paper is so light and thin it can just be sticky-taped into the frame.
If you’re into e-paper stuff but are wedded to your handwritten to-do lists, then why not try building this super slow movie player instead? The blog squad went *nuts* for it when we posted it last month.
Las renuencias de Catalunya y Madrid dejan al ralentí, sin efectividad, el funcionamiento en España de la app de rastreo de contactos Radar Covid, que debía haber estado operativa al cien por cien a mediados de septiembre. En el caso de la comunidad…
I have designed a thermocouple meter for use for obtaining temperature readings from thermocouples. Its used together with the thermal chamber described elsewhere on this site. The design is done primarily as a programmable instrument, but it has a OLED display, so it can show the current temperature. The programming uses SCPI, the same type of programming strings that most newer (1990 forward) instruments use.
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