USB flashlights wiki section - Page 2

Robert Marquard · 08-12-2007, 02:06 AM

Theoretically yes. it is unlikely, but not impossible. It depends largely on the protection built into the circuit.
For a 10-LED light which draws at least 200 mA out of a port which is in all likelihood only built for 100 mA it gets probable. Even if a fuse or some other protection triggers it still renders the USB port inoperable.

JSWolf · 08-14-2007, 12:52 AM

Well then, I know what I'll be doing. Avoiding USB lights at all cost.

MarkRPenn · 10-08-2007, 10:37 AM

Quote:

Originally Posted by Robert Marquard

10 LEDs? It will suck the battery dry in no time. Each LED draws at least 20 mA.
BTW USB powered LED lights are no valid USB devices so you can run into severe problems. In this case the USB port may not deliver more than 100 mA and you may harm the electronics that way.

Claimed power requirement for the 10 LED light is 0.5W, 5V, which is 100mA if accurate.

IF accurate

Mark

ericshliao · 09-16-2008, 04:48 PM

I got my USB LED light (bought at least 5 years ago) working on iLiad. I found it helpful when I am on car at night. It will no longer be boring when sitting in car.

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08-12-2007, 02:06 AM	#16
Robert Marquard Delphi-Guy Posts: 285 Karma: 1151 Join Date: May 2006 Location: Berlin, Germany Device: iLiad, Palm T3	Theoretically yes. it is unlikely, but not impossible. It depends largely on the protection built into the circuit. For a 10-LED light which draws at least 200 mA out of a port which is in all likelihood only built for 100 mA it gets probable. Even if a fuse or some other protection triggers it still renders the USB port inoperable.

08-14-2007, 12:52 AM	#17
JSWolf Resident Curmudgeon Posts: 80,945 Karma: 150249633 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	Well then, I know what I'll be doing. Avoiding USB lights at all cost.

09-16-2008, 04:48 PM	#19
ericshliao Guru Posts: 976 Karma: 687 Join Date: Nov 2007 Device: Dell X51v; iLiad v2	I got my USB LED light (bought at least 5 years ago) working on iLiad. I found it helpful when I am on car at night. It will no longer be boring when sitting in car.

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