DIY ballistic chronograph (smaller and simpler box)

As I used an Arduino Nano instead of the Uno I did not see the necessity for such a large box and decided to lower the overall profile. For a cleaner print I also removed all the engraved letters. 

USB-C connector used for voltage supply:
https://www.amazon.de/gp/product/B0CDBZZQBZ

I also decided to rewrite the firmware for the device which now uses interrupts, provides more data on the display and supports a reset of the values by blocking both sensors for a short time.

https://github.com/pumikachu/dart-chrono

• Lowered the main body
• Removed the screwholes for the Arduino Uno (taped an Arduino Nano inside instead)
• Removed the text from the walls for a cleaner print