USB Power Supply - 3D Baskı Modeli

USB Power Supply

L0ftyGong

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Yayınlandı:2025-12-12 04:32:10

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This Thing is a small enclosure that houses a 12/24Vdc Buck Converter which outputs 5Vdc to a USB A connector. TheUSB Bottom part contains a V-Slot mounting flange comparable with thePrusa MK 2/3 Bear Upgrade.

Input to the devise is 12/24Vdc from thePrusa PSU spare contacts. With the Printer powered up the PSU provides Vcc (either 12Vdc or 24Vdc depending on printer model). The electronics assembly converts this voltage into 5.1Vdc and outputs the result on a standard USB A type connector. Up to 3 amps may be drawn from this connector.

Powering a Raspberry PI running OctoPrint is the primary use for this supply but the it can be used for any other USB charging requirement as long as the current drawn does not exceed 3 amps.

Print Settings

Printer Brand:

Prusa

Printer:

Mk2.5s

Supports:

Yes

Resolution:

.025

Infill:

20%

Filament:

AmazonBasics PTEG

Orange

Notes:

Bottom requires support. Top does not.

How I Designed This ===================

General

This Thing is a small enclosure designed to house a 12/24Vdc Buck Converter that will provide 5.1V to a USB type A connector.

The**USB Bottom** part of the enclosure contains cutouts which will capture the Buck Converter Circuit Board lower protrusions (component mount tabs and through hole solder leads). The cutouts both allow the CB to lay flat on the bottom of the**USB Bottom** as well as retain the board in place through numerous USB cable insertion cycles.

TheUSB Top applies pressure on the upper portion of the USB A connector, forcing the CB into the proper location.

PSU Output is brought into the enclosure through a connector in the rear of theUSB Bottom. The connector used is a 6 position polarized Molex type. Two Pins are used to bring power into the enclosure leaving the other four for any other use. In my design I brought our the input voltage on two of these pins and power the Printer Enclosure Lighting and HEPA Filter. See the following Things:

BOM