11-11 day teardowns (2024 edition)

I guess this is becoming a tradition now?

During China’s Single’s Day sale on AliExpress, I bought various gadgets - both for projects and out of curiosity. Rather than write separate posts, here’s a collection of mini teardowns showing what’s inside each item.

Previous years:

• 2023

Tuya Zigbee 3.5 Inch Smart Wall Switch

non-affiliate link

I’m always looking for a better scene controller/switch/Home Assistant interface. I was curious about which chip they used for the full graphics display and was hoping for an easily hackable Android device. Unfortunately, no such luck with this.

Using ESPHome to Monitor HVAC System

Here’s a quick “show-and-tell” about a recent project I completed.

The concept

I’m not sure how I first came across the idea of measuring air pressure drop across a filter to gauge its remaining life, but I remember thinking it was a great idea.

The idea has been lurking in the back of my mind for a while, but I never got around to implementing it… until now.