Help: Single UV LED powered by a A23 for very cheap application

tonyturbo42

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Jul 9, 2010
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I'm working on a project for school and looking to do very cheap project using UV LED's I have found basically what I'm looking for on ebay as far as the actual LED's now I want to use an A23 to power this single 5mm LED. I bought 2 different LED's and the specs are

1: Emitted Colour : UV (ULTRA VIOLET)
Size (mm) : 5mm T1 3/4
Lens Colour : Water Clear
Peak Wave Length (nm) : 380 ~ 400
Forward Voltage (V) : 3.2 ~ 3.6
Typical Voltage (V) : 3.4
Reverse Current (uA) : <=30
Luminous Intensity Typ Iv (mcd) : 2000 ~ 3000(Max)
Life Rating : 80,000 ~ 100,000 Hours
Viewing Angle : ±10°
Absolute Maximum Ratings (Ta=25°C)
Max Power Dissipation : 80mw
Max Continuous Forward Current : 30mA
Max Peak Forward Current : 75mA
Reverse Voltage : 5~6V

2: Emitting Colour: Ultra Voilet
LENS Type:Water clear
Reverse Voltage:5.0 V
DC Forward Voltage: Typical: 3.2 V Max: 3.6V
DC Forward Current:20mA
Luminous Intensity Typ Iv (mcd) : 5000 ~ 7000(Max)
Viewing Angle:20±10 degree
Lead Soldering Temp:260°C for 5 seconds
Intensely Bright

I only need the LED to last for maybe a week tops and it will run continuously. Will this set up work. Basically I need to the batteries to be under a dollar each as the the whole unit will prob be disposed of after the week and I need to make a bunch of them. I can get the A23's very cheap, You guys are experts do you see any problems with this set up? I bought resistors as well but I wanted to try to run without one and see how long the LED would last. I stacked up three 3.0 volt CR2430's and a white LED was very bright and gave me what I was looking for as far as brightness... Im a total Newb to all this LED stuff but have an electronics computer background... Thanks in advance for any ideas or help..

Tony
 
A23 is not a good battery. It has a high voltage (12v) which you won't be able to utilize unless you do 3 LEDs in series, but VERY low capacity. How long do you need it to run for?

A UV LED can run off 3x alkaline or silver watch batteries, or two lithium coin cells, that's fairly simple.
 
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