Tiny e-Lab Dual USB PSU

thingiverse

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 fan; it's only 7mm thick. A larger fan will not fit this module. - Another buck converter to power the fan. I recommend a Mini360 module for their small size. ## Assembly The top of the rear part has a long cylindrical ridge. This fits inside the top of the front panel. The front panel can then be rotated down to click in place against the rear part. After this, two M3 screws can be screwed in from the underside of the rear part, and into the front panel. This holds it all together securely. The XT60 connectors should be glued in place quite firmly; they will have to manage large forces as modules are connected or disconnected. If you are using a fan, mount that in place first; it might not be possible to add or remove it after the XT60 connectors are in place. The two USB ports must also be glued to the frontpanel. Don't use too much glue here, as the connectors will be unusable if glue gets inside the "barrel" of the USB connector. The Fusion 360 project file is attached if you want to tweak something.