https://25120.org/tags/leshy/ Recent posts in ‘Leshy’ en-gb Sun, 04 Oct 2020 22:30:25 +0200 https://25120.org/img/rss_brand.png 144 92 https://25120.org/tags/leshy/ https://25120.org/post/laurelin/ Sun, 04 Oct 2020 22:30:25 +0200 https://25120.org/post/laurelin/ <p>About two years ago, I made a little LED tree as a gift. An extremely simple design with 17 white 0603 LEDs soldered to magnet wire, twisted and bent to make branches, and combined them to a small LED bonsai. Electrically, all LEDs are wired in parallel and connected to 4.5 V via an LDR. This lets the tree react to the ambient brightness and helps it to great battery life.</p> https://25120.org/post/leshy/ Mon, 03 Feb 2020 21:04:32 +0100 https://25120.org/post/leshy/ <p>This project started when I was particularly annoyed by existing development board options and cheap Chinese PCB prototyping services were starting to emerge. Thus, the path forward was clear, but let’s start with the problems I was trying to solve.</p> <p>When I’m talking about ‘development boards’, I mean boards like the <em>Teensy</em> models, <em>Feather</em> variants or <em>blue pill</em>: a PCB based laid out around a microcontroller containing very little extra circuitry; a ‘least common denominator’ of typical projects using that MCU, if you will. Evaluation boards with more interesting circuitry are great to get used to a microcontroller and its peripherals but lie beyond the scope of this post.</p>