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Open Hardware/Modding: Librem, Arduino, and ESP32

Submitted by Roy Schestowitz on Monday 28th of March 2022 08:56:44 PM Filed under
Hardware
  • Crossing the Chasm Toward the Tipping Point

    The Librem line, PureOS, and Librem One is the foundation for expansion. The Librem line: Librem 14 laptop, Librem 5 phone, Librem 5 USA (with Made in USA Electronics) phone, Librem Key, Librem Mini, Librem Servers. With the Librem line we have a well rounded hardware offering that runs PureOS.

    PureOS: A GNU-based 100% free software truly convergent operating system developed and maintained by Purism pushes the boundaries across our hardware innovations to have a single easy-to-use OS that is on pace to rival the giants. Purism’s PureOS was also where all the development occurs for what we later pushed into GNOME; phosh, phoc, libhandy (now libadwaita), squeekboard, calls, chats, and the long list of adaptive applications. Other companies are adopting PureOS as their base OS for other industries, automotive, drones, IOT, and services; including our very own Librem One.

    Librem One initially a reference platform, will see tighter integration into PureOS and the Librem line since it directly impacts the long-term goal of Purism: to make beautiful convenient products that respect the rights of humans. The ‘convenient’ part of that continues to be a major investment we make.

  • Electromechanical four-digit seven-segment clock displays the time silently | Arduino Blog

    While digital display technologies exist for just about every possible use case, sometimes you want the aesthetics that only electromechanical displays provide. Many makers have built electromechanical seven-segment displays for this purpose, but they are usually driven by noisy servo motors. David McDaid wanted something quieter and created this silent electromechanical four-digit seven-segment display for use as a wall clock.

    Like most similar displays, this uses an individual motor for each segment of each digit. For four digits, that is a total of 28 motors. 28 servo motors get quite noisy, which is why McDaid employed stepper motors paired with silent drivers. Those are typically used for 3D printers in order to make those printers less annoying, but they work well for this project, too. Those stepper motors only need to tilt their respective segments by 90 degrees to “turn off” that segment, so little torque was required.

  • ESP32 Composite Video Library outputs PAL, SECAM and NTSC, supports LVGL - CNX Software

    It’s been possible to use the I2S for video output on ESP8266 and ESP32 chips for years, but aquaticus’ ESP32 Composite Video Library is may simplify the task of outputting PAL, NTSC, or SECAM video signals from any Tensilica-based ESP32 platforms.

    The library does not require any external hardware, and you can just connect an RCA connector to GPIO25 (I2S data) and GND, plus integration with the LVGL library makes it easy to create graphical user interfaces as showcased with the captures below.

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