Return to the thumbnail page Display/hide file information See previous file

USB powered fluorescent lantern

USB powered fluorescent lantern

Click to view full size image

This is my Energizer FL450 running off the USB port of my NEC MobilePro 900C handheld PC. I'm surprised that it worked, since the USB port has a lower current capacity than that of a standard PC, low enough that it won't run my USB hard drive.

IMG_0235[1].JPG IMG_0014.JPG IMG_4304.JPG IMG_3205.JPG

Light Information

Light Information

Manufacturer:Energizer
Model Reference:FL450
Lamp
Lamp Type:2x F4T5
Fixture
Fixture Type:Portable fluorescent lantern
Ballast Type:Electronic instant start
Electrical
Wattage:4 or 8
Voltage:5V - USB port
Physical/Production
Factory Location:China
Fabrication Date:July 2000

File information

File information

Download: Download this File
Filename:IMG_3205.JPG
Album name:themaritimegirl / Experiments, Projects, & Mods
Keywords:Lanterns
File Size:195 KB
Date added:Mar 20, 2013
Dimensions:2050 x 1537 pixels
Displayed:262 times
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-77502
Favorites:Add to Favorites
Comments
rjluna2
Sr. Member
****
Offline

Gender: Male
Posts: 309
View Gallery

Robert


GoL
View Profile Personal Message (Offline)
Mar 20, 2013 at 12:51 PM Author: rjluna2
When you open the device manager, open up the connecting USB hub that supply the power to the lantern. It will display how much current is drawing at the said port

Pretty, please no more Chinese failure.

themaritimegirl
Hero Member
*****
Offline

Gender: Female
Posts: 892
View Gallery

Florence


themaritimegirl themaritimegirl themaritimegirl
View Profile WWW Personal Message (Offline)
Mar 20, 2013 at 12:52 PM Author: themaritimegirl
Remember, we're not talking a regular PC here. This thing runs Windows CE. I'll have to try that on another computer next time I'm home, though.

Electrical Engineering Graduate
YouTube | Twitter | Instagram

rjluna2
Sr. Member
****
Offline

Gender: Male
Posts: 309
View Gallery

Robert


GoL
View Profile Personal Message (Offline)
Mar 20, 2013 at 01:19 PM Author: rjluna2
I thought every Microsoft Windows operating system should show the device manager at the properites from Windows version dialog box

Pretty, please no more Chinese failure.

themaritimegirl
Hero Member
*****
Offline

Gender: Female
Posts: 892
View Gallery

Florence


themaritimegirl themaritimegirl themaritimegirl
View Profile WWW Personal Message (Offline)
Mar 20, 2013 at 01:25 PM Author: themaritimegirl
Well, in Windows CE, there's no Device Manager, there's no Properties, and there's no Windows version dialog box.

Electrical Engineering Graduate
YouTube | Twitter | Instagram

rjluna2
Sr. Member
****
Offline

Gender: Male
Posts: 309
View Gallery

Robert


GoL
View Profile Personal Message (Offline)
Mar 20, 2013 at 02:20 PM Author: rjluna2
Well, that is interesting

Pretty, please no more Chinese failure.

BG101
Full Member
***
Offline

Gender: Male
Posts: 165
View Gallery

EYE H80 Mercury Vapour


Brian TheTellyman
View Profile Personal Message (Offline)
Mar 20, 2013 at 02:55 PM Author: BG101
Stick a meter in series with it! I bet that is horrible to the tubes BTW, total power can't be more than 5 watts even if the USB port can supply an amp


BG

Say NO to DICTATORSHIP in the form of bulb/tube/ballast bans !!

themaritimegirl
Hero Member
*****
Offline

Gender: Female
Posts: 892
View Gallery

Florence


themaritimegirl themaritimegirl themaritimegirl
View Profile WWW Personal Message (Offline)
Mar 20, 2013 at 03:25 PM Author: themaritimegirl
Stangely enough, I've tested current draw before using an outboard computer power supply I have, and it draws around 800 mA at ~5.5 volts. So I don't know why something with a current capacity of less than 500 mA doesn't kick it off, especially when it does kick off a USB hard drive that probably uses less power. Must be something to do with surge current.

By the way BG, did you ever get that PM I sent? LG's messaging system is screwy, so I never know. It still says I've never sent a PM even though I in-fact have to multiple people.

Electrical Engineering Graduate
YouTube | Twitter | Instagram

Ash
Hero Member
*****
Offline

Posts: 3737
View Gallery


View Profile Personal Message (Offline)
Mar 20, 2013 at 04:22 PM Author: Ash
In PCs hte USB port is supposed to be protected by a resettable fuse at 500mA

Actually, other things happen : Usually the USB ports are in pairs, each sch pair is fused together t 1000mA. So nothing prevent you from pulling them all from 1 port (if you dont load hte other thats in pair with it)

In some PCs the port may just be overfused a bit to prevent tripping at loads that count on abusing hte port. like eyternal USB drive

In some PCs htere ias simply no protection, its straight on the PSU rail - Seen this in some oloder PCCHIPS boards
Medved
Hero Member
*****
Offline

Gender: Male
Posts: 4333
View Gallery

View Profile Personal Message (Offline)
Mar 20, 2013 at 05:06 PM Author: Medved
It is supposed to be short circuit/overload protected, but it should allow currents up to 500mA.

The current value the Device manager display is a number someone programmed into the descriptor of the device, not the real current.
It mean, what current the device want to allocate for itself. It is used in the way, than before "power enable" the device's USB controller tells to the USB hub, what current it could draw. USB hub check, if the required reserve power is still available (e.g. if all the powered USB devices in total won't exceed the hub's power capability). If yes, it then switch the device to a functional mode, when it could draw it's current. Otherwise it either does not activate the device, or free up the power reserve by putting some other devices into "power save".

So when you only just hook something to the USB power pins, the Windows (nor any other OS) would have any clue on how much current you draw. And in fact the USB standard allow only very limited current draw without the proper authorization.

In "large" PC's there is a simple 700mA PTC and a monitor, so it does not care about the authorization (it have plenty of power available), but notebooks tend to be more strict about following the power allocation/authorization procedure, because they have limited power resources.
But many newer ones are simply designed to have enough power reserve and do not complicate the stuff with the advanced power management (they approach it by a "brute force"), so they are not as strict anymore. But then the only information you get is about the heavy overload/short circuit, nothing else...

No more selfballasted c***

Flurofan96
Sr. Member
****
Offline

Posts: 271
View Gallery


View Profile Personal Message (Offline)
Jul 30, 2014 at 03:34 AM Author: Flurofan96
Wow that is very cool I have never seen a typical small fluroesant lantern being powered by a USB lead and port

BTW very cool computer you got

I will give LEDisease a taste of my shoe

themaritimegirl
Hero Member
*****
Offline

Gender: Female
Posts: 892
View Gallery

Florence


themaritimegirl themaritimegirl themaritimegirl
View Profile WWW Personal Message (Offline)
Jul 30, 2014 at 10:07 AM Author: themaritimegirl
Thanks.

Electrical Engineering Graduate
YouTube | Twitter | Instagram

themaritimegirl
Hero Member
*****
Offline

Gender: Female
Posts: 892
View Gallery

Florence


themaritimegirl themaritimegirl themaritimegirl
View Profile WWW Personal Message (Offline)
Mar 28, 2016 at 01:48 AM Author: themaritimegirl
I now have a picture of the LG web site being shown on another type of Windows CE device, a Pocket PC, here.

Electrical Engineering Graduate
YouTube | Twitter | Instagram

© 2005-2019 Lighting-Gallery.net | Powered by: Coppermine Photo Gallery