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Je passe de la théorie à la pratique avec ce petit montage, ces deux LEDs sont alimentées par un port USB de mon ordi.
Le but est de me bricoler un petit éclairage à placer derrière mon écran.
Le port USB débite du 5 VDC, les LEDs sont prévues pour un maximum de 3.5 VDC à 20 mA.
Les résistances sont donc de R = U / I : (5 - 3.5) / 0.02 = 75 Ω.
Le montage final comportera 5 LEDs, soit un courant de 100 mA, ce qui est raisonnable pour un ordinateur de bureau.
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Juli 2016
Canon EOS 60D
EF 24-105mm f/4L IS USM
Creative Commons Licence BY 2.0
creativecommons.org/licenses/by/2.0/
Quellenangabe / Credit:
Maja Dumat - CC BY 2.0
Solar LED Lantern Distribution in Badin Oct19, 2011
Location: Goth Ramzan Dal in U/C Bhugra Memon, Badin District, Province of Sind, Pakistan.
Pervaiz Lodhie “Pehli Kiran” poverty alleviation program to bring socio-economic empowerment to women and children in the worst effected areas of 2010 – 2011 floods in Pakistan.
Solar LED Lanterns designed and manufactured by LEDtronics USA and Shaan Technologies Karachi Pakistan.
500 LED Lanterns donated to 500 Badin”s poorest families under Pervaiz Lodhie “Pehli Kiran” program.
100 LED Lanterns donated to 100 Badin”s poorest families by SASA (South Asian Society of America)
Distribution of LED Solar Lanterns facilitated by UNDP GEF SGP
UNDP (United Nations Development Programme)
GEF (Global Environment Facility)
SGP (Samll Grants Programme)
Present at the event:
Masood Lohar (UNDP SGP National Coordinator Pakistan)
Satomi Kato (UNDP Islamabad Pakistan)
Pervaiz Lodhie (LEDtronics USA)
Ejaz Chaudhri (Aitemaad Trust Pakistan)
The mushroom shape is made out of transculent Fimo with a little bit of glow in the dark Fimo on the top
I finally get a sense of what this thing will look like in the real world. The big black circles are the plated mounting holes. The holes will be smaller. These dots are showing the width of the copper plating around them, too.
ITEM: LED Rear Turn Signal Kit M Ver.2 for 2011-2013 Hyundai 5G Grandeur HG / Azera
MANUFACTURER: IONE (Tuning Factory)
ORIGIN : MADE IN KOREA
CONTENTS: LED Module - 2PCS (RH/LH).
Power (PWR) LED is on as long as the RCDC is powered. The RC LED only goes on when the RCDC is receiving a valid RC hobby servo pulse signal.
A shop in Kiel, Knooper Weg.
Just a test photo of my new lens, a 55/2,8 Micro-Nikkor. It was taken at f8, 1/200s and ISO 200. Nothing special, but I like it. And the lens seems to be quite sharp :-)))
At the D100, there is no exposure metering with manual lenses like this. I estimated the exposure and no bracketing was necessery afterwards, according to the histogram. I was quite happy, that I could estimate it like that :-)))
Now pleased to announce a cooperation with LED LENSER!! My new sponsor!
(Canon EOS 450D, Sigma 10/20mm, Trepied Vanguard Espod 233AP, LED Lenser M14)
Inserting IR LEDs to be soldered together in 11 arrays of 8 LEDs each, with a 1 ohm resistor to ground.
Sam and myself took some long exposure pictures in the basement of Cord, in the northern quarter, manchester. One of us was posing while the other one was drawing shapes with an LED.
Next to cab over bed to store Led light while in move, $9 fan from Wal Mart. Below fan is bolt on 12V female cigarette lighter socket from Wal Mart & male 12V plug in(3 holes)Radio Shack
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