Notes

Blog

Notes on websites, WordPress, Node.js and Android apps, and now and then electronics.

26 September 2026
A board for the car, and the 12 V that wants to kill it
How I designed a dedicated Raspberry Pi Pico 2 W board for my Golf IV: why the 12 V input has four protection stages and how I ended up with two TPS54360 converters. The schematic and layout are generated by Python scripts. Revision 0.1, not ordered yet.
26 September 2026
A cheap LED strip and a protocol nobody documented
The LED controller in my car accepted every Bluetooth frame I sent and did nothing with any of them. This is how I worked out what it expects, and how that grew into WireAmbi, an app with a music mode that gets from a detected beat to a Bluetooth write in 6 ms on average.