Hey everyone! I wanted to share a DIY project I recently completed to modify my Xiaomi sensors to run on USB power. I’ve been dealing with the hassle of battery replacements for years, and I finally decided to find a more sustainable solution. Here’s how I did it!
The Problem
I’ve been using Xiaomi sensors for a while now, but the frequent battery replacements were getting tedious. I wanted a way to power them without relying on batteries, so I looked into making them USB-powered. After some research and with a little help from friends, I came up with a solution that works perfectly!
The Solution
- Drilling a Hole - I started by carefully drilling a small hole in the side of the sensor casing. This was to create space for the USB cable and voltage regulator.
- Soldering Connections - Next, I soldered the ground and 3.3V output pins from a voltage regulator to the battery contacts inside the sensor. This step was crucial to ensure the sensor receives the correct voltage.
- Installing the Voltage Regulator - I used a voltage regulator that converts 4.5-24V to 3.3V, which is perfect for this project. This ensures the sensor gets a stable power supply.
- Securing the Connections - To make sure everything stays in place, I used hot glue to secure the cable and voltage regulator inside the casing. This prevents any movement that might cause the connections to loosen.
- Final Touches - I applied some UV resin to the connections to add an extra layer of protection and used UV glue to secure the cable to the side of the casing. This keeps everything neat and prevents the cable from moving around.
The Results
After completing these steps, I connected the USB cable to a power supply, and voilà! The sensor worked perfectly without any battery replacements. It’s now permanently powered, and I don’t have to worry about it disconnecting or going into power-save mode.
Why This Matters
This modification has been a game-changer for me. It’s not only more convenient but also more eco-friendly since I’m reducing the number of batteries I use. Plus, it’s a fun DIY project that gives me a sense of accomplishment!
Looking for Feedback
I’d love to hear if anyone else has tried something similar or has any tips to improve this setup. Let me know in the comments!
Cheers and happy tinkering! 