Search found 4 matches

by suncm
Wed Dec 11, 2013 8:34 pm
Forum: V-USB
Topic: V-USB certification non-compliance details
Replies: 2
Views: 2147

V-USB certification non-compliance details

V-USB states that "devices based on V-USB cannot comply to the electrical specifications of the USB standard because the AVR's I/O characteristics don't match the requirements of USB". Can someone elaborate on this? What specific characteristics of AVR's does the USB certification not agre...
by suncm
Tue Nov 19, 2013 5:40 pm
Forum: V-USB
Topic: Changing USB maximum current ouput
Replies: 5
Views: 4773

Changing USB maximum current ouput

I'm working on a project based on the EasyLogger project. My interface works great, but the sensor I'm attempting to power requires around 120mA. The total current requirement for my circuit is around 140mA. The problem, though, is that USB ports seem to not be sourcing more than 100mA of current. I...
by suncm
Mon Jul 29, 2013 8:02 pm
Forum: V-USB
Topic: EasyLogger ATtiny45 not working on select computers
Replies: 1
Views: 2195

Re: EasyLogger ATtiny45 not working on select computers

On a similar note, even though some computers don't not recognize the device, should the computer display a notification at least acknowledging the USB device? The laptop on which the program works doesn't display anything. It just just starts typing the values on a word processor.
by suncm
Sat Jul 27, 2013 7:12 pm
Forum: V-USB
Topic: EasyLogger ATtiny45 not working on select computers
Replies: 1
Views: 2195

EasyLogger ATtiny45 not working on select computers

Hi all, So simple enough- I've replicated the V-USB EasyLogger project ( http://www.obdev.at/products/vusb/easylogger.html ) and it works on only select computers. It runs fine when plugged into my friend's Lenovo ultrabook, but it won't work on my desktop (Asus motherboard). I just get a notificati...