Goal: get clean temperature + humidity readings from a DHT22 on a Raspberry Pi and log them to a CSV every 5 minutes for later graphing. Why the Pi is harder than an Arduino: the DHT22 has a strict ~50µs timing protocol. Arduino can bit-bang it deterministically because nothing…
What you'll build: a small Wi-Fi weather station that exposes a JSON endpoint with live temperature + humidity, plus a tiny HTML page you can open from any phone on your network. Parts list: • ESP32 DevKit V1 board (any clone is fine) • DHT22 temperature + humidity sensor (DHT11…
What it is: a flat MIDI controller with 12 capacitive touch pads on a sheet of acrylic. Plug it into a computer over USB and it shows up as a native MIDI device — no drivers, no extra software. Ableton, FL Studio, GarageBand all see it instantly. Why Teensy LC: it has native USB…
Goal: a wireless soil + air sensor I can stake into the garden, powered entirely by sunlight, that runs for at least 6 months without intervention. Got there — has now survived monsoon season unattended. Power chain: • 6V / 2W solar panel (mini polycrystalline, ~115×85mm) • TP40…
