Learn how to build a wireless freezer monitor with ESP32 and Home Assistant. No permanent modifications, no batteries, just local temperature monitoring.

Today, we’re turning one of the most cursed objects of contemporary e-waste, a disposable vape, into a musical instrument. It’s like an ocarina, using your breath to activate and your fingers to control the pitch.

This tutorial covers how to get CO2 and other environmental readings from the STC31 using both Arduino and MicroPython when connecting the CO2 Sensor Breakout to a compatible development board over Qwiic.

Transform a PS4 controller into a DIY sound machine! Learn to build a custom sequencer using CircuitPython and fun audio samples.