Andrés Blog

Sometimes I want to watch the price development of a product in different online web shops over some time. My intention is to compare prices and to find a point in time where the product gets cheaper and therefore more interesting to buy

I recently came up with the idea to write a clean template project for creating new STM32F4-based projects. The effort to create new firmware projects should be minimal while still maintaining maximum control and transparency over what happens in the build stage.

If you want to develop your own embedded hardware, you often need a communication interface to a host, usually a PC. In times where the classic but easy-to-handle RS232 interfaces are no longer standard components in modern computers, you basically have two options when it comes to wire-bound connections: Use a USB to UART converter… Continue reading USB: Virtual COM ports under different (Windows) operating systems and the driver problem

I recently stumbled upon a problem which I thought could be easily solved when I wanted to do design a PCB with an unusual board outline (e.g. a star-shaped board). Since I am not such a great artist when it comes to painting or drawing, I downloaded an .svg file of the shape from Wikipedia… Continue reading Getting a custom board outline from an .svg file into KiCad

I recently bought myself one of ST’s cheap Nucleo development boards with an STM32F072RB controller on it to quickly start developing one of my projects. The microcontroller has native USB support even without an external clock which makes it quite attractive. The downside is that this board does not come with a USB connector that… Continue reading Quick hack: Add native (user) USB to ST’s Nucleo boards

This is a follow-up post to my previous project page Part 5 (PC software). This is the last post concerning this project. I have done some tests with the final hardware and software. Furthermore I have written a small conclusion to this project. Transient response An interesting test is the transient response on a sudden… Continue reading Project: Active load with microcontroller – Part 6: Validation and conclusion

This is a follow-up post to my previous project page Part 4 (Firmware). One way to interface with the active load device is to use a terminal program and query the state of the device or send commands to it manually. But this is of course very cumbersome and not very user-friendly. That’s why I… Continue reading Project: Active load with microcontroller – Part 5: PC software

This is a follow-up post to my previous project page Part 3 (Schematic, layout and pictures). At this point the hardware development is finished and fortunately nothing blew up as I had plugged in a voltage source for the first time.

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