If you ever used air filters to keep smells, fumes and dust at a low level in your workshop, you for sure came in contact with these expensive throwaway active coal filters. While throwing-away the used active coal seems to be unavoidable, all the thrown away plastic and packaging of the filter can easily be…
Category: Common
Round Corner Template Set for Woodworking
Sometimes I like to have rounded corners in my woodworking projects. It seems many people like to soften the spiky ends of their panels because there is a huge range of templates for routing. If you own a 3d printer, it is handy you can print just the template with the size you actually need….
Storage Boxes System Survey
Please take the following survey to help with further development of the storage boxes system. It is the best way to nudge future changes of the system into the direction you like. 😄 More Posts
New Storage Boxes
Today I published several new storage boxes with the label section placed at a different side. So, it will allow you to use the same box size in a drawer but keep all label orientations the same. The following two illustrations show the difference between the 1✕2 and 2✕1 size: Both boxes have exactly the…
Build and Heat Treatment of a Carbohydrate Source
In this short tutorial, I will explain step by step, how you can build a solid carbohydrate source. You will find the bill of materials and all required tools. I will use SI units to simplify all measurements. This is no quick build, the substances require long reaction and activation times. For this reason, the…
How to Print the Turntable Platform
When I wrote part 3 of the pet feeder series, I did not expect the light transmission issues of this part. Now, I have two solutions with new revisions of the part. Solution 1: Epoxy Filled Slots This is the superior solution with the best results, but it requires you to fill four tiny slots…
Pet Feeder Update
A short update about the progress with the sensor panel and photos of the final input panel board. I assembled the new boards and are testing the sensors. As soon as all tests are done, and I am happy with the results and the board’s design, I will write the next part. These are 940nm…
Art Like Boards from OSHpark
For the pet feeding device, I ordered boards from OSHpark with the “After Dark” style. This colour combination of the black substrate with the copper and transparent solder mask is just beautiful. I made this post just in case you did not see the pictures on Twitter or like to see them with a better…
The MicroPython Bitmap Tool
I created a new tool to easily convert bitmaps into code for MicroPython. This first version is just a start, creating a framework where I can add additional converters. If you have any questions, missed information, or simply want to provide feedback, feel free to comment below or contact me on Twitter. 😄 More Posts
Flawless PCB by Eurocircuits
I got another flawless, perfectly produced PCB by Eurocircuits. This is Revision A of the input panel board I published in the last post. There are only minor changes in the silkscreen and a little bit larger rings around the holes for the LED. Eurocircuits is not the cheapest board prototyping service, but in my…