Tiny e-Lab Dual USB PSU

Compatible with marcluer's awesome Tiny e-Lab:
https://www.thingiverse.com/thing:2999383

This is a Tiny e-Lab module that supplies power to 2 USB ports, and shows the voltage and current draw of the USB ports. It has an option of using a 40mm fan for cooling, or just vent holes with passive cooling.

I built this module with a Mini360 buck converter, and this means it can be powered by voltages between 7-23V. You can take an old laptop power supply (12-20v), solder an XT60 connector to it, and you should be able to power this, and any other Tiny e-Lab module.


## Bill of materials:
- 100V/10A combined Voltmeter/Ammeter.
- A DC-DC buck converter, set to output 5V. Most modules will work. I use a Mini360 buck converter from Ebay.
- 2x Female USB connectors
- A male and female pair of XT60 connectors.
- A 21x15mm rocker switch.
- 2 M3 screws. Length should be between 5-18mm.

### Optional parts if you want to use a fan
- A 40x40x7 fan. This is thinner than a normal 40mm