Summary of Simple USB Isolator
This article describes a simple PCB project for a USB isolator, designed to protect computers from faulty devices by electrically separating data and power lines. The board features two input connectors (one for computer data/power, one for external power) and a single output connector, ensuring no direct ground or power connection exists between the host and peripheral.
Parts used in the USB Isolator:
- PCB
- Two input USB connectors
- One output USB A connector
- Isolator chip
This is the PCB from https://github.com/vhs/vhs-pcbs/tree/master/usb-isolator. No components are included, PCB only.
In one of the earlier SMD workshops I’ve running at VHS I managed to temporarily kill my new MacBook pro when I plugged in a participant’s prototype. I revived it by removing the back cover and disconnecting the battery all the time chanting to myself, must get a usb isolator, must get a usb isolator, must get a usb isolator…..
This is a nice simple soldering project that does exactly that, isolates your USB port from connected devices. There are two input usb connectors, one carries data and power from the computer the other supplies power to the output. The output comes from a 3rd USB A connector. There is no power/ground/data connection between the computer and connected devices other than through the isolator chip. This board has two grounds, two power supplies etc.
For more detail: Simple USB Isolator
- What is the purpose of this project?
To isolate your USB port from connected devices and protect your computer. - How many input USB connectors does the board have?
The board has two input USB connectors. - Does the computer connect directly to the device grounds?
No, there is no power/ground/data connection between the computer and connected devices other than through the isolator chip. - What components are included with the PCB?
No components are included; it is the PCB only. - Why did the author create this project?
The author temporarily killed their MacBook Pro when plugging in a participant's prototype during a workshop. - Where can I find the source files for this project?
The PCB files are available at https://github.com/vhs/vhs-pcbs/tree/master/usb-isolator.
