My first attempt at this circuit, which when transferred to breadboard didn’t work. Hopefully the simulated one will fare better.

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Here is a circuit I’ve been working on, my first with transistors. Red LED turns on when microcontroller, MC, is powered. Green LED turns on and red off when a signal is sent via GPIO from MC.

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It took some doing, but I finally got my BEM280 (temperature, pressure, humidity) sensor for my balcony weather station working in C. Crazy how much the Circuit Python library was doing: setting bunch of config values like mode and oversampling rates, enable/disable filter, reading compensation params, and parsing the read out values. Pretty cool to do it all yourself and understand the sensor on a deeper level.

https://git.sr.ht/~travisshears/balcony-weather-station/tree/main/item/bme280.c

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First step to create my envisioned model rocket setup is learning LoRa radios 📻. Goal is to stream live altitude readings from rocket to “ground station” (cardboard box with 7 segment display).

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#modelrocketry