https://www.joeycastillo.com/tags/open-book/Recent content in Open-Book on joey castillo's personal websiteHugoen-usThu, 09 Jul 2026 00:00:00 +0000https://www.joeycastillo.com/objects/open-book-touch/Thu, 09 Jul 2026 00:00:00 +0000https://www.joeycastillo.com/objects/open-book-touch/A pocketable, front-lit, open source e-reader — for every book, in every languagehttps://www.joeycastillo.com/objects/lcdwing/Tue, 28 Jun 2022 00:00:00 +0000https://www.joeycastillo.com/objects/lcdwing/<p>The LCD FeatherWing is a low power display module compatible with Adafruit’s Feather line of development boards. After three years of learning product design and electrical engineering, I believe this little gadget represents my most mature design to date. It&rsquo;s a simple, streamlined design with a custom LCD, optimized for low BOM cost and easy manufacturability. By plugging in to the Feather ecosystem, I also felt confident that it would find market fit relatively quickly.</p>