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Tux Machines
Posted by Roy Schestowitz on Jul 26, 2023
> SparkFun is 20 years old this year! We're lucky enough to have a bunch of employees that have been around for over 10 of those years, and we wanted to share their reflections on their time here with you. Today you'll be hearing from Kristen Moorefield.
> Before attempting to confirm or refute the remaining hypotheses, I wanted to be able to better quantify the problem. In that vein, I made some tools and scripts which would attempt to render what noise was present as a function of reported ADC counts. The idea was to sweep each phase of the motor through a range of fixed voltages, and capture a time domain signal at a variety of steady state points. Then, we would plot the magnitude of the noise, and what the the frequency components looked like throughout the range.
> The Vindriktning air quality sensor is sort of fascinating. Opening it up is pretty easy; all you’ll need is a PH0 screwdriver. Once open, you’ll see a Cubic PM1006 particulate sensor connected via flying leads to a PCB which hosts an Eastsoft ES7P001FGSA microcontroller, which talks to the PM1006 sensor and drives the LED on the front of the Vindriktning based on the readings.
> The artwork features slides of laser cut acrylic, each of which is illuminated by LEDs. As a sheet is illuminated, the image which has been etched on the acrylic is illuminated. By using multiple slides, and multiple light sources an animation effect akin to Neon signage is produced. The Pico is responsible for alternating between these sheets and controlling what colors appear from the LEDs. Sprixels has managed to daisy chain seven signs together using just one Pico as a controller.
> 3D printers need to set their hot ends to a very specific temperatures suited to the filament material and keep them at those temperatures throughout the printing process. Most use PID (proportional-integral-derivative) control for that purpose, which modulates power according to an algorithm that prioritizes stability and prevents feedback oscillations. But what if you want to control a hot end that isn’t connected to a 3D printer? In that case, Michael Klements has a guide on how to build a dedicated hot end controller.
> During the proliferation of the internet in the 1990s, the internet was decentralized enabling free trade and commerce on an equal basis where content creators were free to publish anything at will.
> Although the internet today is still theoretically decentralized, we cannot discount the fact that the internet, artificial intelligence (AI), and connected technology have been centralized by a handful of multinational corporations that include Google, Apple, and Microsoft.
> Google, Apple, and Microsoft control access to internet trade and commerce by way of their operating systems that support intrusive apps while controlling app distribution.
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