Variable power supply enclosure SK120 ( usb-C )
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An enclosure that turns an SK120 module into a usable power supply, with a USB-C input and 4mm banana plug output
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Updated at source:
Model information
- Source
- Printables
- Category
- Electronics
- License
- Creative Commons — Attribution — Noncommercial
The enclosure is a safe way to use the power supply. It has holes for cooling and doesn’t take up much space. It uses an SK120 module, which is a cheap DC buck-boost converter, basically, a variable power supply.
To power it, you need a phone charger that provides more than 5V ( at least 6.5V ) to make the SK120 work. Any fast charger should do the job. You also need a USB-C PD trigger, which enables the charger to provide a voltage higher than 5V.
The output power from your power supply will always be limited by your charger. Theoretically, the SK120 can go up to 120W, but I personally use mine with a 65W charger — it's enough for me.
To build this power supply, you need:
- to 3D print the main part and the lid to close the enclosure without support
- 4× M4 screws to close the lid (any length should work fine)
- an SK120 module: AliExpress link
- 2× female 4mm banana connectors: AliExpress link
- a USB-C PD trigger: AliExpress link
- at least 18 AWG or 16 AWG wire for the connections
(The links are not affiliated, they’re just here to make things easier for you and this is what i used.)
Wiring diagram :
I used CA glue to hold the USB-C module. The banana connectors are screwed in, the lid is screwed with the M4 screws, and the SK120 module simply snaps into place.
Hope you like the design ! Feel free to ask anything if you plan to build it yourself