"moocowmoo" <meltyb@hotmail.com> wrote>> Kensington sell a USB-powered LED-on-a-stick which would seem to do >> the job. http://www.kensington.com/html/1176.html > > That won't do the job. You'll probably wreck it with reverse polarity > and because it has charge storage you'd have to wait an hour for the > LED to go out after you disconnected it.That's interesting. I didn't think that these were anything more than an LED and a resistor. What else do they have in them?
How to safely test USB connector installation
Started by ●December 1, 2004
Reply by ●December 2, 20042004-12-02
Reply by ●December 3, 20042004-12-03
"Matthew Kendall" <mdkendall@hotmail.com> wrote in message> "moocowmoo" <meltyb@hotmail.com> wrote> > >> Kensington sell a USB-powered LED-on-a-stick which would seem to do > >> the job. http://www.kensington.com/html/1176.html > > > > That won't do the job. You'll probably wreck it with reverse polarity > > and because it has charge storage you'd have to wait an hour for the > > LED to go out after you disconnected it. > > That's interesting. I didn't think that these were anything more than anLED> and a resistor. What else do they have in them? >I reckon he's confused by the statement 'Uses less than 90 seconds of battery charge per hour' ie the power used by the LED in an hour is equivalent to running the laptop for about 90 seconds. I looks to me like it's just an LED and a resistor in some snazzy packaging. Anyone actually taken one of these things to bits? Richard
Reply by ●December 3, 20042004-12-03
I found at http://cablesonline.com/usbdainusb.html an inexpensive USB tester -- it's currently selling for $5! and it's already saved me because as soon as I got it I plugged it into a known good computer's port and then into the CPU board and it showed that one is wired correctly and one isn't! That's an incredible return o nmy investment since it would have taken me at least 5-10 minutes to hack up a cable and connect a meter. Norm