Blue LED Flashlight Mod
Intro: Blue LED Flashlight Mod
Here's a quick 10 minute hack to turn an ordinary white LED flashlight into a much cooler blue LED one.
STEP 1: Dismantle the LED Part of the Flashlight
Take appart the top part of the flashlight, and remove the LEDs from the reflector part.
This may be hard, as it's stuck in there, but in the 2 that i've done this two, they aren't glued at all, so it should be easy.
This may be hard, as it's stuck in there, but in the 2 that i've done this two, they aren't glued at all, so it should be easy.
STEP 2: Remove the Old LEDs
Desolder the old LEDs from the round PCB, be sure to mark the direction of the flat side, as that's important.
STEP 3: Put the Blue LEDs In
Put the Blue LEDs into the holes you just made. Be sure to keep the flat side pointing in the same direction, otherwise the circuit wont work.
side note, ultra bright white LEDs use the same current as ultra bright blue LEDs, green ones will also work, as should violet, and pink LEDs.
Red or yellow will not work.
side note, ultra bright white LEDs use the same current as ultra bright blue LEDs, green ones will also work, as should violet, and pink LEDs.
Red or yellow will not work.
STEP 4: Put the Flashlight Back Together
That's it 3 and a half steps, super simple, and even though the blue LEDs are no where near as bright as the original white ones, the simple fact that they are blue makes up for it!
see some more pictures heresee some more pictures here
see some more pictures heresee some more pictures here
28 Comments
AerialInk 14 years ago
Deadly Computer 14 years ago
I do have a question, how is the UV leds?
Because I was recently looking to get a UV light for some stuff, and I'd much rather make my own if possible.
Doctor Freeman 13 years ago
Deadly Computer 13 years ago
like diffuse the light so it's not a point, encasing it in clear hot glue is somewhat usefull for diffusing it.
i'm not sure what you mean by defuse though.
AerialInk 14 years ago
LuciferTengu 14 years ago
ZOOBREAK 14 years ago
joeofloath 14 years ago
xdarkxsparkyx 15 years ago
ironsmiter 14 years ago
JshDav 15 years ago
Frogz 15 years ago
http://www.google.com/products?q=uv+led
k300000 15 years ago
Deadly Computer 15 years ago
Derin 14 years ago
ironsmiter 14 years ago
Note though, that it is not exact.
The blue led I ripped out of my broken external harddrive won't even dimly glow till AT LEAST 3.5 volts are applied. 3.7 volt Li-ion battery gives it 'just enough' power to run at 'normal' brightness. SOME leds, have resistors integrated, for 5 volt, or 12 volt applications. I even have one BRIGHT blue led, pulled from a toasted external harddrive, that requires 4.3 volt just to light, and begins getting 'warm' at 5.2 volt.As far as i can tell, that one has no resistor in it.... but it may be really tiny, and hiding in the plastic lens body so infer what you will from that.
The problem with using lower voltage leds, with a higher supply voltage, is you are over driving them. they may light up nice and bright for a time, but then will burn themselves out from the thermal overload.
Noodle god 15 years ago
peede1 15 years ago
Thelonelysandwitch 15 years ago
electronic nut 15 years ago