USB Voltage Protection Circuit

Job Description:

Design a circuit for a device that goes between a USB device and a computer that protects the computer for any shorts or excessive voltages that occur or come from the USB device. The USB device is a prototype device that is under development and as such at risk for shorts, reverse wiring, and over voltage across any of the power and communication lines (5 pins/wires).

A successfully designed circuit will include an electrical schematic, a description of how the circuit works and provides protection, and it will meet the following functional requirements:

Uses generally available through-hole (no surface mount) electrical components.

All electrical components are identified by a manufacturer's part number, and ideally by a recommended source / brand P/N when many suppliers exist and the performance of the component varies considerably among the sources.

The circuit begins with a USB A recetacle/female connector that the USB Device would connect to and ends with a USB A plug/male connector

Protects all five of the USB pins/lines (VCC, D-, D+, ID, GND) from over voltage, short circuit, reverse polarity, etc.

At least one LED provides indication of a successful power transfer connection. Any additional LEDs that can provide useful information would be a bonus.

The USB data capabilities (2.0, 3.0, ...) and performance, as well as the charging capabilities are not adversely affected by the insertion of the device between a USB Device and a computer (or powered USB hub).

You must sign a Freelance Contract with terms that state I own the complete rights to the circuit design you create, and you must keep the entire project confidential, and it limits the liability for both of us.

Skills: PCB Layout, Electronics, Electrical Engineering, Circuit Design

About the Client:
( 1 review ) Bernville, United States

Project ID: #34444486

Awarded to:


Hello, I am an electronics engineer with more than 20 years of experience in the design and production of electronic boards. I also develop low-level programs for my electronic boards, which allows me to provide a comp More

$140 USD in 7 days
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10 freelancers are bidding on average $155 for this job


Hi there,I'm biddin on your project "USB Voltage Protection Circuit"Circuit Design, Electrical Engineering, PCB Layout and Electronics Design a circuit for a device that goes between a USB device and a computer that pr More

$250 USD in 3 days
(25 Reviews)

Hello, I am an electronic engineer. I have worked for over 9 years on embedded systems and developed many PCB prototypes with high quality. I would like to talk all details about the design over the chat.

$100 USD in 1 day
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As an Electro-mechanical Engineer, I bid on your project because I have the expertise and experience to provide high quality work. I can achieve the results that you are asking for. So , respond to the offer so that we More

$120 USD in 2 days
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Dear Client. Thanks for posting this project. We are very pleased to bid for your project. This project caught my interest and I am 100% confident that I can complete your project. I have experience in hardware and emb More

$80 USD in 7 days
(7 Reviews)

Hi there. Thank you for your posting. I have just read your job description and your project is really interesting to me. I have many experiences with Circuit design, PCB design in USB device. I am sure I can complete More

$140 USD in 7 days
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Hello,I also had occasion where I needed my usb device have a protective features such as voltage surges and noise which lead me include these protective features in nearly all my usb related projects. I will provide y More

$180 USD in 5 days
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