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Open Hardware/Modding: Arduino, Librem, Zenreader and More

Submitted by Roy Schestowitz on Tuesday 20th of April 2021 04:00:34 AM Filed under
Hardware
  • Building a better battery analyzer with Arduino | Arduino Blog

    Your favorite device has just run out of juice, so you quickly take off the cover and reach into that old stash of alkaline batteries you have lying around. After trying countless combinations, you still cannot be sure they’re working properly, as each one has been slightly used. If only there were a way to know.

    In comes a maker named Moragor with his take on a battery analyzer. The one he built doesn’t just measure the voltage for a certain type of battery. Instead, users can select from three different types (alkaline, NiMh, or Li-on), along with the current from a sleek OLED display. Then, values get read, shown, and also logged to an SD card for more advanced analysis. The entire device is based on a custom PCB that acts as a shield for an Arduino Mega.

  • Librem 14 in Pictures

    We are excited that the Librem 14 is shipping, and we are so pleased with the production model that we wanted to share some brand new pictures of it inside and out...

  • Zenreader: A 4.7 inches E-Ink RSS Reader Powered by ESP32

    The ESP32 is a microcontroller that has very little RAM and isn't quite suited to deal with HTML and such. So I had to use a Raspberry Pi as a rendering proxy and transforms the RSS and the text on the page so that the ESP32 can digest. The idea is to transform XML RSS to JSON and transform any article URL to plaintext by a nodejs script via an HTTP API SaaS or whatever you call it. Even so, I think I'm stretching the ability of the little controller. Anyways, it works most of the time – or at least, I hope, not worse than the Kindle. At least now I can flip one page at a time.

  • It’s easier than ever to add two-way communication to Arduino devices

    There’s a brand new device-to-device communication feature available now in the Arduino IoT Cloud. It’s something we’ve been working on for a long time. So we’re excited to see how it’ll add a whole new connected dimension to your Arduino projects.

    [...]

    Combined with IoT Cloud’s dashboards this delivers a powerful new way to build incredible automations with minimal (if any) changes. Furthermore, it gives you smartphone control of your connected boards via the existing Arduino IoT Remote iOS and Android apps.

»

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