This project is a small wearable video and sound recording device that extracts the camera collection part from a robot car. It draws inspiration from 3D shell printing projects.
It can be hung around the neck with a rope, and a safety pin can be added at the back.
The above image uses the Zero, boost module, and camera.
“This cute camera can be tied to a lanyard or clipped to a pocket or backpack, taking a picture every few seconds. Insert the SD card into the computer to view the day’s activities, or compile all images into a time-lapse animation.This DIY project is realized with the compact and affordable Raspberry Pi Zero, offering excellent configurability and customizability!”
My modification added a microphone pickup. I originally thought I could find a built-in microphone device on the camera but found none with a CSI interface, only USB interfaces. I also found this WM8960 hat.
And this one.
Both use the WM8960 audio codec chip, 
If there is time and energy, the WM8960 can be integrated into a PCB to retain only the recording function, or a driver-free USB microphone can be used, but the pickup effect will certainly not be as good as that of a matrix microphone.
Finally, I modified the shell to look like this.
Let’s record it first.
Friends who love DIY and are interested in this project can leave comments to discuss together.