• Prusa MK3S ~ Stop Button

    This was a one day build. I leave my printer running unattended and I know that others in my home would have trouble finding the reset button or off switch if/when something went wrong. Solution, add a big friendly stop button. I have built several arcade machines over the years, so I had plenty of control panel buttons. This is a 46mm 12V red button. I pulled apart the switch and swapped the built in resistor to be 100 ohms, so I could run from 5V. Prusa’s 3D printers are open source. Even better, they design their 3D printed parts using openscad. My favorite 3D CAD program. https://github.com/prusa3d/Original-Prusa-i3/tree/MK3S I grabbed…

  • Portable Solder Iron

    On a whim, I purchased a $20 USB Solder Iron from Aliexpress to play with. After playing with it using an old phone charger, I saw a video on Adam Savage‚Äôs Tested channel and got inspired. Drill Batteries as the power source. What a great idea! I have lots of those and always keep a few charged up and ready for projects. However, finding a drill battery adapter for my Black and Decker 20V set was a challenge. It’s all discontinued. Black and Decker only sell new bluetooth batteries with USB ports built in. No adapters to be found. Searching for a solution, I found forum posts saying that black…