Design And Assembly Of An I2C Relay PCB

Check out the project on GitHub. During the last few months, two interesting opportunities coincided: First, I was asked to design a purpose-built electrical control board for a water pumping system. In addition, I had an idle offer for financial sponsorship waiting in my inbox. This finally gave me a reason and the means to…

A Proximity Chat Mod for “Among Us”

Check out the project on GitHub, and join our Discord server if you want to. Due to quarantine, several interesting and fun computer games resurfaced and got popular. One of these games is “Among Us” by InnerSloth, an online multiplayer social deduction game, similar to the board games “The Resistance” and “Mafia”. When I play…

FORTRAN In The Browser

Your scientists were so preoccupied with whether or not they could, they didn’t stop to think if they should. I wanted to learn more about WebAssembly (Wasm), the new and cool kid in town. When testing out a new technology, you should always know why you are doing this and what you want to achieve….

Building a Laser Cutter: Part 6 – Focus Aid

My laser cutter is working perfectly. However, depending on the thickness of the material being cut, the focus of the laser lens needs to be adjusted. This is done by turning the lens screw in front of the laser, which is both finicky and imprecise. To improve this situation, I 3D-printed a small focus-lever with…

Raspberry Pi Cross Compilation using Docker

The Raspberry Pi is a great little computer for makers. However, it lacks the performance to compile big software packages in an acceptable timeframe. So I set out to create a fast and easy-to use docker-based cross-compiler for the Pi, which runs on much more powerful machines like for example a VPS. Continuous Integration This…

AVR ISP Programmer

Like many makers, I took my first steps in hardware programming using the Arduino platform. And just as Atmel Microchip hoped, I am still pretty faithful to the AVR platform today. To program AVR microchips, you need some kind of (USB) programmer. I opted for a cheap USBasp clone, because it is cheap but still…

Upgrading a LEGO Power Brick

Do you remember the good times of LEGO? Or even LEGO Technic? Turns out that LEGO is a timeless classic and still very much fun. What is not timeless however, is battery technology. Several old LEGO models are powered by 9 Volts via six 1.5 AAA batteries. This proved to be cumbersome, because the batteries…

Building a Laser Cutter: Part 5 – Bearing Upgrades

After two years of usage, the x carriage of my laser cutter became rather wobbly. Wobbling! My old nemesis! What should I do? First, I tried to use different bearings. I bought some DryLin PTFE self-lubricating plastic bearings: https://www.amazon.de/gp/product/B01M328GIR ~5€ But they were no use in my configuration. They tended to bind, and what’s worse,…

Pimp My 3D Printer

Adventures in tuning my Anet-A8 3D Printer. About a year ago, I purchased a rather inexpensive “DIY” 3D printer kit directly from the country that sells everything; China. My model of choice was the “Anet-A8” printer, due to its low price and big online support community. Not only the price and support led to my…

The Steampunk Wristwatch

Recently, I visited an Anime and Cosplay convention. Although I rarely watch any Anime, I do enjoy crafting costumes and in particular steampunk-esque things. Of course, I could not let the opportunity pass. So I decided to dress up as a steampunk gentleman. Nixie Tubes I always wanted to build something with Nixie tubes. Those…