Simple Cheap USB LED Light
Intro: Simple Cheap USB LED Light
This is my first Instructable so I thought I'd start with something simple.
For this project you will need:
1 - Male USB plug (got mine from a $1.50 Wii Intercooler)
1 - 22 ohm resistor (red-red-black) thats all I had, dunno if its perfect
1 - LED
Soldering/Desoldering Iron
Solder
Hot glue (optional)
Sorry about the bad pics
***NOTICE***
If you do anything wrong and screw up your computer, burn your finger etc etc...I'm not responsible!
It's a very easy project, but things could go wrong,
For this project you will need:
1 - Male USB plug (got mine from a $1.50 Wii Intercooler)
1 - 22 ohm resistor (red-red-black) thats all I had, dunno if its perfect
1 - LED
Soldering/Desoldering Iron
Solder
Hot glue (optional)
Sorry about the bad pics
***NOTICE***
If you do anything wrong and screw up your computer, burn your finger etc etc...I'm not responsible!
It's a very easy project, but things could go wrong,
STEP 1: Extract the USB Plug
Open the Intercooler (or other sacrifice) and locate the male USB plug...not to hard. Next desolder the USB plug from the board. I pulled out the middle 2 tabs because those are for data.
STEP 2: Marriage
We gather here today to celebrate the joining of Mr. USB and Miss LED....umm err whatever
First, solder the ground on the LED to the ground on the USB plug.
Now solder one end of the resistor to the +5 volt plug (power) of the USB port, solder the other end to the positive lead of the LED.
First, solder the ground on the LED to the ground on the USB plug.
Now solder one end of the resistor to the +5 volt plug (power) of the USB port, solder the other end to the positive lead of the LED.
STEP 3: Test and Finish
Now plug it into your computer to see if it works. If it does, move on; if it doesn't, go back and try again.
If you want, you can put hot glue around the connections to secure them. I did because my stuff always breaks.
That's it! Go light up a computer!
If you want, you can put hot glue around the connections to secure them. I did because my stuff always breaks.
That's it! Go light up a computer!
16 Comments
mortezy.jomhory 9 years ago
hi
mortezy.jomhory 9 years ago
hi
mortezy.jomhory 9 years ago
hi
mortezy.jomhory 9 years ago
hi
aakashsunkari 9 years ago
Great Project! I made it longer and flexible so it could come on my keyboard.
LIMPOPOTECH 10 years ago
I didn't use the resistor and it worked fine... Is that bad?
junits15 14 years ago
microchip55 13 years ago
ODST.Tainted 14 years ago
jaxxster1 14 years ago
Berserk87 15 years ago
with your 22 Ohm resistor that led is getting the full 50mA (and more if it can get it).
your going to be burning your led out.... =\
you should be using a 200 Ohm resistor minimum (25mA) , you could be using a 500 Ohm resistor if you want (10mA).
if your using a ultra bright led (the clear ones) there still blindingly bright at 7mA. (700 Ohm resistor).
zaketus 15 years ago
You are using U = R/I -> R = U*I, but you are using wrong U. U isn't voltage drop of the whole circuit, nor it's the supply voltage (witch is voltage drop of the whole circuit :P), but in this case it's voltage drop over the resistor. In this case power supply is 5 volts, voltage drop over led is something like 1.6-2.2V (it can be something else, but these are common voltage drops of red LEDs) that makes voltage drop over the resistor: 5V - 2.2V = 2.8V. Now this is the U we are going to use in R = U*I formula, when calculating the value of the resistor.
Lets say voltage drop over the led is 2.2V and we want 15mA : R = (5V-2.2V)/15mA = 2.8V/0.015A = about 187ohm.
Chicken2209 15 years ago
lemonie 15 years ago
ju1c3d 15 years ago
lemonie 15 years ago