![](https://zhengfangs.com/wp-content/uploads/2022/01/a-hidden-protest-1024x455.jpg)
Adafruit feather 32u4, masks, buttons, servo motors, 3D printed parts, wires.
After doctor Li — the whistleblower’s death, many Chinese young people and activists were in a rage. They wore masks with the protest words above, and walk on the street. But in China, that would cause a very serious result. Thus, I designed this wearable device, which can help them make a safer protest.
![](https://zhengfangs.com/wp-content/uploads/2022/01/a-hidden-protest_1-1024x768.jpg)
![](https://zhengfangs.com/wp-content/uploads/2022/01/a-hidden-protest_5-1024x768.jpg)
![](https://zhengfangs.com/wp-content/uploads/2022/01/a-hidden-protest_3-1024x768.jpg)
![](https://zhengfangs.com/wp-content/uploads/2022/01/a-hidden-protest_4-1024x768.jpg)
![](https://zhengfangs.com/wp-content/uploads/2022/01/a-hidden-protest_2-768x1024.jpg)