---
slug: "protoarc-em01-usb-dongle-holder"
title: "ProArc EM01 Dongle Holder"
description: "I created a USB dongle holder for the ProtoArc EM01 trackball."
url: "https://www.ytyng.com/en/bio/protoarc-em01-usb-dongle-holder"
achieved_at: "2023-11-12"
updated: "2026-02-15T05:23:40.935Z"
category: "3Dプリント"
image_url: "https://media.ytyng.com/20240429/61c120e160bf4f1a9e254455087ccd66.jpg"
lang: "en"
---

# ProArc EM01 Dongle Holder

# Motivation

I recently purchased a trackball called [ProtoArc EM01](https://www.amazon.co.jp/dp/B0BZTVCH1V/). Despite its affordable price, the build quality is impressive, making it a high cost-performance product. However, I found it inconvenient that there is no designated storage space for the USB dongle.

Therefore, I decided to create a dongle holder.

# Finished Product

<div class="stl-viewer my-3" src="https://media.ytyng.com/20240429/3bb140b2fbd44edebb9fc85e62b0b391.stl"></div>

[Download the STL file](https://media.ytyng.com/20240429/3bb140b2fbd44edebb9fc85e62b0b391.stl)

By inserting it between the base plate and the main body, it functions as a dongle holder.