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Topic: USB Isolator (Read 1816 times) previous topic - next topic

USB Isolator

Anyone who has been watching my YouTube videos will know that I've been working on this USB isolator for quite some time (for no particular reason other than getting distracted by other projects). I figure now is a good time to post the project here on the forum so more people can check it out.

The boards pictured below are of rev2. I just finished off rev2.1 which fixes a few small things (such as LED placement) and adds a jumper header to bypass the linear regulator. This way a user can also use the barrel connector with a 5V supply.




http://www.youtube.com/watch?v=zwrKXnvnfwQ
http://www.youtube.com/watch?v=u_raXuAebnY

I received inspiration for the project from other USB isolator projects on the internet. Mine features a few improvements to many of them:
    - USB-B and micro-USB connectors on the host (upstream) side.
    - In addition to accepting power via the barrel connector (which goes through a basic 7805 low dropout linear regulator), there is also a micro-USB port for device-side power. This allows you to use the now common cell phone charger cube to power your isolated device.
    - Push-button switch for easy USB disconnection events.
    - Bypass jumper for linear regulator, allowing for 5V power from the barrel connector.
    - Encased in a small box to protect the IC from the world.

You can find it on my website: http://galvant.ca/shop/usb-isolator/ where I'm currently collecting pre-orders for anyone interested. Any and all support for my work is greatly appreciated and goes a long way to allow me to keep making OSHW.

As usual for all my work, everything is OSHW and the sources can be on my github page: https://github.com/Galvant/usb_isolator-pcb

Thanks!