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.
10 freelancers are bidding on average $155 for this job
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.