DC UPS (5V, 9V, 12V) based on LX-2BUPS module

DC UPS based on LX-2BUPS module (5V/9V/12V, with a USB Type-C power connector).

This is useful for powering internet switch/router during a power outage.

If you need 5V UPS with USB output, use this design instead.

Aug 2024 update:
I noticed that the UPS gets a bit warm when powering one of my switches, so I decided to add vents. To keep it from being boring, I added them as a polarized monochrome vyshyvanka. Just print ups-cable-top-vents-vyshyvanka.stl instead of ups-cable-top.stl.
 

May 15, 2025 update:
Added new STL files featuring ventilation holes inspired by traditional Ukrainian vyshyvanka patterns to celebrate Vyshyvanka Day. Just print any of ups-cable-top-vents-vyshyvanka*.stl instead of ups-cable-top.stl.
 

Print Settings

Printer:

RepRap Mendel

Rafts: 

No

Supports:

No

Resolution: 

0.3

Infill:

50%

Filament:

3dplast.biz CoPET 

black

Notes:

Print it in transparent plastic if you want to watch the LEDs of the module.

Post-Printing

Step 1

Prepare all parts for assembly. There are several modification of the LX-2BUPS module. The modules can have a micro-USB or USB Type-C power input, and differ by 5V, 9V or 12V output. So make sure you are using the correct module (with a USB Type-C input socket, and producing the required UPS DC output).
Print ups-cable-bottom.stl, ups-cable-top.stl (or ups-cable-top-vents-vyshyvanka.stl if vents needed) and one of {ups5v-cable.stl, ups9v-cable.stl, ups12v-cable.stl} depending on UPS DC output voltage (or ups-cable.stl if you don't like to label the voltage).

In addition to the LX-2BUPS module and printed parts, you will need:

• 18650 battery, 2pcs;
• DC barrel jack plug;
• pair of wires;
• a pair of heat shrinks or kapton tape to insulate the wires in the DC plug;
• Screw 3.0x25, 4pcs.

Step 2

Solder a pair of wires to the DC power jack, use heat shrinks or kapton tape to insulate.

Pull the wires through the bottom left hole of the LX-2BUPS module and solder the wires to the corresponding USB+ and USB- pins.

Step 3

Insert the batteries into the UPS and assemble the bottom part of the device.

Step 4

Finish assembling the device by screwing the top part to the bottom part with four 3.0x25 screws.

Aug 2024 Update: top part with vents

Category: Electronics