Livescribe Symphony Smartpen Why Pen and Paper? I love to write, jot down notes, and scribble. I find physically writing to be a very rewarding experience. With the presence of tablets with styluses having become very commonplace, one wonders why anyone would continue to use things like pen and paper. There are reasons. Mine as…
Problems With International Supply Due To Covid-19
Wow. Been a while since I’ve worked on and ordered a project. The supply chain of parts has been either causing delays. For large scale operations, this is manifesting as a “chip shortage” problem impacting production and delivery of things like cars. For folks like myself, who are just designing and working on small projects…
CH340G + STM32 Dev Board Revisited…. V2
Overview In a previous post, I had shared some pics of the dev board I had been working on. It contained a variety of features that I felt would be useful on a dev board. However, due to a mistake on my part, there were shorts in the design due to my misunderstanding of how…
PCB Interface Board for Vive VR TRacker
General Goal So I was playing with the room-scale VR tracking trackers and wanted to break out some of the pins to add in switches and such. Design Considerations The Vive VR trackers are basically round pucks for a base and a pronged crown for the external portion. The prongs contain the cameras which watch…
STM32 Dev Board With CH340G USB
Overview Development board employing an STM32 MCU with a CH340G USB interface IC. LED(s) associated with GPIO pins. Inertial Motion Unit, TCA6424 I2C GPIO Expander. Errata So the boards arrived and they look GREAT! However, upon plugging them into the USB, some Bad Things(tm) happened: The USB ports overheated. The laptop it was plugged into…