On Monday 08 October 2007, Jan Hoevers wrote: > Jan Hoevers wrote on 8-10-2007 8:32: > > Chuck wrote on 8-10-2007 3:12: > >> instead opting for an inline fuse > > I would dump the fuse to. Even a fast blow fuse is much to slow to > > protect the electronics of the usb port you use as power supply, so it's > > useless. > > Fuses are to prevent fire in the home. In a power supply the fuse goes > > between the mains connector and the transformer, not on the output. > > Besides, I've never seen a fuse in an usb device, I suppose usb ports > > have an electronic overcurrent protection. > > One more remark about that fuse in the USB line: > > I usually work with used equipment, but if you have a valuable > motherboard you may not feel comfortable using its USB port to power > outdoor rooftop devices (think of static discharge). I guess that weird > fuse idea must have come from that (but fuses won't work as static > protection either). > > You could use a cheap self powered USB hub as a power source. Those > things with their own wall-wart I mean. With no USB attached, they are > still a cheap 5 volt supply, and you were planning the USB plug anyway. > > They come as cheap as 10 or 20 euro; blowing that is better than blowing > a mobo... >
great idea! i never thought of that. and since the usb wire negative is tied into the system negative, ground loops would not be an issue. very nice idea! > Jan > _______________________________________________ > timekeepers mailing list > [email protected] > https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers > -- Chuck "...and the hordes of M$*ft users descended upon me in their anger, and asked 'Why do you not get the viruses or the BlueScreensOfDeath or insecure system troubles and slowness or pay through the nose for an OS as *we* do?!!', and I answered...'I use Linux'. " The Book of John, chapter 1, page 1, and end of book _______________________________________________ timekeepers mailing list [email protected] https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers
