Author: ahd
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PCBs for dual BLDC motor control
In order to make the assembly of future motor projects more straightforward, I decided to make two motor driver PCBs that are meant to be used with the library SimpleFOC and an ESP32. One uses three cheap BTS7960 dual driver modules from Aliexpress and connects them in a neat and secure way (compared to my…
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A general-purpose motor test and calibration stand
I found myself in need for a proper test and calibration stand were I can easily switch motors, electronics and applications. It consist of three main stages on top of each other and bolted together. The first one elevates the whole assembly to have enough ground clearance for test equipment. The second stage is the…
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Product: Tactical Vase
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New Addition to the Production Setup: A Voron 2.4
I am excited to have finished my work on building a Voron 2.4. My particular machine features the new Dragon Ultra-High-Flow extruder from Phaetus. It utilizes an interesting new concept of enlarging the melt zone by screwing in an adapter between the heating block and the nozzle. A Klicky probe enables the calibration of the…
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Product: Gyroid Coasters
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Product: StackMag
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Using Helmholtz Coils to measure the remanent magnetization of a permanent magnet
While working on my first product for sale, the StackMag, I bought a lot of neodymium magnets. For the first batch, I ordered 50 magnets from Aliexpress. After gluing them all in place, I noticed that they were significantly weaker than expected. They should have been N35 grade which is basically the lowest you can…
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Hacked digital caliper writes measurements in Excel sheet
For my bachelor thesis I needed to take a lot of manual measurements with a caliper. As a side project I decided to spend some time on interfacing the caliper via a connection bus that basically every cheap caliper has. Most of the time they are just hidden and a hole needs to be drilled…
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Automated Printing Setup for StackMag
When printing a lot of parts the biggest pain point is that you have to clear the print bed between every print. Because I will be printing a lot of the same parts I wanted to automate this process, so the printer can run continuously. Printing multiple parts at once is not a good option,…
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Reinventing a magnetic toy – the Levitron
Levitation is one of these things that everyone thinks is cool. As a kid, I already tried out many times finding the right arrangement of magnets so they would float on top of each other. Finding out that some mathematician already proved this to be impossible hundreds of years ago was quite disappointing (Earnshaw’s theorem).…