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“For a while a wanted to make my own flight recorder similar to the commercial altimeters but with my own requirements for functionality. In addition it needed to be visually appealing and functional in the same time … After some thinking …
Project Designing a simple and cheap temperature logger. Part 3: Open collector, FATs and de-debugging

“I had at last some time to work on the project. The prototype PCB is (at least, electrically) functional. I started with making the TMP102 temperature sensor work. Nothing to say in particular, it’s just an other I2C-small-package-sensor …

“One of my main goals with this design is to archieve very low standby current, somewhere in the tens of microamps. The basis for this is a low-power buck on the basis of a Texas TPS62120 where the microcontroller can …