published: February 21, 2018 — last modified: October 23, 2025
Today I got the PCB coaster from Adafruit. They look so much better in real than on the photos in the shop. The coasters are made from 2.4mm FR4 PCB material. There is a transparent solder mask on the top to protect the copper and gold elements. The frame around the image is black silkscreen.
I really like the combination of the cold and coper colours.
The coasters were designed by Saar Drimer at Boldport. You can buy them in the Adafruit shop.
More Posts
Posted on 2019-11-25— Projects
I built a compact Neopixel-based candlelight decoration with a DS3231 RTC and share the schematic, firmware, and build tips here. It's best placed behind a screen or in a jar. Read the full post for parts, assembly photos, and configuration notes to recreate it yourself.
Posted on 2021-11-16— 3D Printing, Projects
I’ve released a major update to my 3D-print storage box system: expanded sizes (up to 6x6 and 9x9 split), improved geometries, 3MF files, JPEG previews, and more dividers. If you use my boxes or print them yourself, read the full post for download links, compatibility notes, and printing tips.
Posted on 2020-12-11— 3D Printing, Projects
I created a parametric Fusion 360 insert template for the flat storage box series and included a drill-insert example, STL files, and OpenSCAD scripts. Download the free files, tweak the parameters to fit your tools, and read the full post for setup tips and examples.
Posted on 2021-01-19— 3D Printing, Projects
I've released a set of 500 3D-printable boxes decorated with smileys, each with two lid options and clear part-numbering to pick inner dimensions. I share printing tips, material recommendations, and a GitHub link for STL downloads—please read the full post for files and printing guidance.
Posted on 2017-08-24— Projects
I built a simple, single-portion programmable cat feeder in about four days using rapid prototyping. I describe the Fusion360 sizing, plywood shell, servo mechanism, electronics, and the issues I encountered with breakout boards. If you're curious, read the full post for parts list, wiring and source code.
Posted on 2020-11-30— Projects
I've updated the flat boxes set with a refined wall profile (revision B) and added five new boxes, including a large 2×4 and four grid variants. I show corner comparisons and note existing customers received files. If this is useful, please check the full project details on the project page.