This is a post about what we think is the right approach to make an indestructible cases for your DIY projects. Imagine this scenario: take a group of people and lock them in a room. Give them a flashlight and tell them that the only way out of this room is up the ladder and […]
Here is a reason why we used Cene the CNC for plastic milling. And here are few tips and tricks for CNCing plastics, in our case polyethylene: Use the sharpest drills you can find. Similar to milling aluminum, plastics tend to melt and stick on blunt bits and drills. Very important. We used all, 2, 3
Merging Files If you’re using SALOME to create STL files for meshing you can only save separate surfaces to separate files. That’s not a problem if you’re using snappyHexMesh but cfMesh only takes an STL file that has all surfaces combined and named. I wrote a simple Python script that does that for you. Save
There are numerous RC filter pole calculators online and I happily used them for a quick calculations while DIYing. The problem is that these online calculators calculate frequency pole where gain decreases by 3dB, which is fine, but what if you need to know the frequency of some (first-order) filter while given only the specifications about
The Problem: Path optimization The exact origin of this problem is somewhat blurry but since I already have the solution I won’t put much effort into clarifying it. We have a particle that moves along a spatial curve, starting from point r1 with a defined velocity of v1 and ending its path at r2 with
By now almost all of my projects included some sort of communication with PC, mostly with external USB-UART bridge chip like MCP2200 or CP210x. Although this devices were mostly prototypes and/or single products, such approach added unwanted costs and since almost all uC that I used already have USB peripheral embedded, there is no excuse not
There is a post (STM32 And Custom USB HID Device? Yes Please!) that gets a lot of attention, although at the time it was created, only vague “how-to” was presented. I decided to break down this to smaller parts of modifying STM32 USB HID code, generated with STM32CubeMx. Here is an example of a basic
I build a Serial Tool for developing serial communication and custom protocols. Than I wish to share it with my friends and than there was a problem. Originally, Serial Tool was written in python v2.7 and pyqt4. My first windows distribution was created with py2exe with no problem. I followed simple online tutorial and voila, there it
