Physical Hardware & Smart Gadgets · Standard
The fridge alarm
Records temperature and humidity every ten seconds, keeps a week of it, and shouts if the fridge door was left open at two in the morning.
- Parts
- $45
- Effort
- 6 days
You end up withA sealed logger, its firmware, and a readout of the last run.
What you will use
- Sensirion SHT45
- Raspberry Pi Pico 2 W
- Bluetooth
- MicroPython
Grounded in
Adafruit SHT45 precision sensor$12.50 for a laboratory-grade temperature and humidity part. Accuracy is the point: a logger nobody trusts is a toy.
Enroll and build this — $950
You make the real choice at the end of week one.