Category: Electronics
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T-Beams Of Bable
I have five LilyGO T-Beam SUPREMEs all transmitting and receiving every 15 seconds via Lora radio (Semtech 1302 chip). This is a test of mutliple units being active and then seeing how well a Lora sniffer works. The units are named: Amy Bob Cy Dan Ed I also have a Lora sniffer using the Semtech…
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Lithium Battery Alert
<p>Adam Savage of Myth Busters Fame released a 21′ <a href="https://www.youtube.com/watch?v=-Y23nfAOiXQ">video</a> “The Surprising Flaws in 18650 Lithium-Ion Batteries”on YouTube on January 20, 2026. Adam has 7,100,000 subscribers. Adam interviews these two employees from <a href="https://www.lumafield.com">Lumafield</a>:</p> <ul> <li><a href="https://www.linkedin.com/in/jualexju">Alex Hao</a></li> <li><a href="https://www.linkedin.com/in/andreas-l-bastian/">Andreas Bastian</a></li> </ul> <p>The upshot is that Lumafield has used a scanning device to see…
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LilyGO T-Beam SUPREME Case Comparison: Cost, Durability, and Field Practicality
After surveying available case designs and materials, printing several variants, and comparing service-bureau options, I concluded that the Alley Cat case offers the best balance of durability, access, and discretion for real field use. While I specified nylon for my print, other materials such as ASA (Acrylonitrile Styrene Acrylate) are also viable; the rest of…
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Voron Design – 3D Printer
pas pour les âmes sensibles [Not for the faint of heart]” – François Rabelais? Voron Design is a three dimensional printing (“3D”) project created in 2015 to create a no-compromise 3D printer that was fun to assemble and a joy to use. It had to be quiet, clean, pretty, and continue to operate 24 hours…
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Visual Diff Of Printed Circuit Boards
<p class="wp-block-paragraph">A light meter project that measures sunlight in a similar way that a rain gauge measure rainfall caught my interest. I’ve been trying to measure how much sunlight my orchids receive in the greenhouse during low sun months in Salem, OR. The project is a paper published in <em>Electronics</em> titled “<a href="https://www.mdpi.com/2079-9292/14/11/2225">Open-Source Photosynthetically Active…
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Greenhouse Sensors: Version 1
<p class="wp-block-paragraph">Below are the three sensors I assembled for tracking environmental data. I have two in the greenhouse and then one outside. Currently, the three sensors provide temperature, humidity, and power readings every second and send their data by radio to the base station where the data is then saved into a database. From the…
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