Open Hardware: SBC, Purism, and Arduino
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Banana BPI-Bit-S2 BBC Micro:bit compatible board supports WiFi - CNX Software
Banana BPI-Bit-S2 is a board for the education market that’s compatible with the BBC Micro:bit V2, but offers WiFi connectivity instead of Bluetooth LE through an Espressif Systems ESP32-S2 wireless microcontroller.
The BPI-Bit-S2 succeeds the earlier Banana Pi BPI-Bit with ESP32 WiFi & BLE microcontroller that was a closer match to the original BBC Micro:bit than the new ESP32-S2 board for which I see little benefit, except for the slightly lower price tag.
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Latest Improvements in Purism’s Privacy-first Cellular Plans - Purism [Ed: Cellular and privacy are contradictory concepts. This is snake oil.]
Our customers and supporters are concerned about the privacy of their phone data. With other big telecom providers, phone data does not stay private; it’s collected, linked with a person’s identity, and sold to advertisers. Purism treats user data like uranium. Unlike Big Telecom, Purism does not spy, and does not share any Personal Identifiable Information (PII) with any cellular carriers, fully protecting the privacy of its users.
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This clever clock displays the time in magnetic fields | Arduino Blog
You’ve probably seen videos of people moving magnets near iron dust, which results in the dust aligning itself to the patterns created by the magnetic fields. Magnetic viewing film works the same way, but with the dust in an oil suspension sitting in the gap between two sheets of transparent plastic. By moving that film over magnets, one can see the magnetic fields almost like they’re on an LCD panel. Moritz v. Sivers took advantage of that fact to build a clock that displays the time on magnetic viewing film.
Sivers did this by putting a small sheet of magnetic viewing film in a 3D-printed frame over four wheels. They arranged numbers around the circumference of those four wheels, a bit like an analog clock face. The numbers are made of magnetic foil, so their magnetic fields appear on the viewing film as the wheels rotate. Four boxes stenciled onto the viewing film indicate which numbers make up the current time, so reading this magnet clock is as easy as any digital clock.