Iâve ordered one of these:
I hadn't thought about the swiveling USB adapter...
Whoops... I think one just got added on the DX order I was just about to make... How did that happen? 
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@ _the_
My wife has that same rug; unfortunately, her cat decided it would make a great alternative to the litter box. I guess she thinks it's grass???
Monitoring mine with a non-contact IR thermometer, getting temps of nearly 140 FâŚ
A couple of additional observations on my MINI lights...
I ordered a total of four at the same time, and fromt he same eBay seller; two each of cool and warm tints:
The two cool-white lights aren't bad; they have a cool tint that's not overly offensive if you don't mind CW tints. Both of the cool white MINIs have a quiet, but noticable, whine at a mid-range brightness levels. The whine isn't audible at the lowest and highest brightness settings, but as the brightness ramps up or down, you can hear the whine fade in and then out.
The two warm-white lights don't have the same whine, but even though they were purchased together, have a vastly different tint to the LEDs. One is a pleasant creamy/warm tint. The second, even though superficially the same, has the unpleasant puke-a-tronic green tint to the light. No pics yet...
I plugged all four into a USB hub... That turns them into a mini stadium light... 
My warm white developed a faint whine after having it on high for a while.
I did some tinkering with the Mini but nothing exciting to report. I tried some bigger caps (100, 220 uF) but it wouldnât hold memory of the mode for very long, and it only worked if I turned the Mini off before unplugging.
Any idea how to mod these so that as soon as they get power, they would light up?
Are the SMD components likely to be damaged easily?
I was thinking of putting some thick tape around the edge of the board so it protrudes just a bit higher than the level of the components, creating a temporary reservoir (not on the connector plug part of course) then filling it with some UV setting glue so theyâre all encased and the unit is more rugged.
Edit - hereâs one i made earlier, much tougher
UDO: for that you would need to bypass the mcu or just buy cheaper version that does not have sensor and itâs on instantly when you plug it.
CRX: they look pretty sturdy to me, I would say they will hold rough handling just fine.
The problem is the switch must be reset, so even if you wire it to come on on insertion, you need to break the connection to reset it, to be able to make it ramp. (I tried replacing the touch control with a push to make switch).
OMG I just received 3 MINIs, I regret I didnât ordered 30 :â(
This is the light that has the highest happinness/price ratio
Got 8 of these (4 warm white, 4 cool white) from this seller for $1.82 each. I'm really liking them
I keep one plugged into my computer so I can see the CD/DVD Burner. It's dark under my desk.
My two warm white minis arrived very fast from China. Wish I had ordered 20, they are great.
Mini is quite catchy :bigsmile: I gifted a few of them to non-flashlight-addicted friends and the find it interesting also.
Darn, sounds like they canât be made to turn on as soon as they receive power.
I was thinking of putting a USB power adapter into a switched wall outlet, putting a stiff âwormâ style extender on it, and putting one of these lights on the end of that⌠which would then let me turn it on and off with a wall switch. But if it doesnât come on when it receives power, that wouldnât really work.
The plan is to put one or two directly behind my television so itâll be backlit. I currently have sort of a prototype running, but it canât be turned off without reaching behind and touching the switch.
Paddington, Lord of All He Surveys, looks out over his domain:
There are some that have no switch and turn on when inserted? Though these are quite bright:
http://www.fasttech.com/product/1558501
Oh, I just checked newly listed and they have 5 cool white for 5.58 USD:
http://www.fasttech.com/products/1/10006956/1741602-6-stw8q14be-100lm-6000-6500k-pure-white-light-usb
They also have the kind with pot and sensor (5 for 5.08 USD, warm white).
I plugged one of my minis in my Raspberry Pi which is on the back of the TV and I just leave it and the Rpi turned on all the time.
Iâll probably just order one (or five) of each, and use whatever works best.
Originally, I was planning to do something much more complicated⌠but Iâm not sure if Iâll ever get time. The plan was to put an XM-L2 or maybe XP-G2 triple or maybe a MT-G2 (at low-ish power) on copper and mount the copper directly onto a CPU heat sink, mount the heat sink onto the back of the television, and run them with some sort of common qlite driver or something, via a power converter plugged into the switched wall outlet. Then I could control the brightness via the wall switch, and it could go up high enough to make regular room lighting unnecessary.
But itâs a lot easier to just stick a USB dongle in and call it mood lighting. 
(the photosensitive ones look particularly promising, since I could just leave it powered on all the time)
At this rate, in a year or two, all the batteries we buy will have the flashlights built right in, with the components microscopic under the shrinkwrap.