Simhub belt tensionner case

# Simhub belt tensionner case
This is my [Simhub](simhubdash.com) belt tensionner case *(more info on Discord)*

There is 2 Arduino:
- One UNO for my pedals vibrators
- One NANO for the belt tensionner

The UNO is powered by a 48 to 12v converter

At this time, the relay doesn't work as expected.
The relay engages as soon as the arduino receives current from the USB and should turn off when the USB is off, but the additional current provided by the 48 to 12v converter maintains 5V on the 2 arduinos.


# BOM
## Screws:
M6\*9 x 2 = square fixation
M4\*9 x 4 = power supply fixation
m3\*10 x 2 = UNO fixation
m3\*10 x 2 = nano + usb + relais fixation
m3\*10 x 4 = case top fixation
m3\*10 x 2 = power supply socket fixation
m3\*10 x 2 = USB support fixation
M2\*4 x 4 = [hub usb](https://fr.aliexpress.com/item/4000062956240.html?spm=a2g0s.9042311.0.0.27426c37KNBhaW)
m5\x10 x 4 = drivers fixations
[little screws](https://fr.aliexpress.com/item/4000048003597.html?sp