In this project i just made a bunch of 10 led of 1watt and join them to make a perfect light and the most great thing is that it works on normal charger...
My work in these videos
Step 1: Required
1. 10 leds of 1 watt with heat sinks
3. Small 5 volt samll cpu graphics card fan
4. Some Creativity
Step 2: LED Arranged
First place the leds on heat sinks only and make a structure as u like as shown in picture.
Attach all the heat sinks by a solid paste which get solid after mixing
Now strip the aluminum wire and get the thin wires
Step 3: Connecting Wire
To make perfect tight connectiin just solder at one end than straight the wire to next point and drop a solder flux thats it. if u didnt get any direct path that just turn wire and try to make a path
At last make a connection to any positive or negative and check if all light are glowing or not
Step 4: Attaching Fan
important thing to b careful about there must be a space of 5-7mm between heatsink of led and fan. So that a Good airflow will work. I made this by place a mobile battery between them.
By making holes in fan chasis and first tie a thick copper soft wire to the fan chessis and other end to the heat sink by soldering.
Do this process from four sides.
Connect this fan in parallel to the power supply and led.
Step 5: Placing and Power
For power supply cut the charger pin and solder it to the led supply.
Be careful while choosing charge it must b output rating of 5volt with 1amp.
By mesuring with multimeter in led running condition voltage is 5volt dc with 1.02amp which is max output got from charger
I had one that kind of light for my backyard roof..
You can cover it with reflectors which is made by wrapping aluminum food foil paper with glue and tape and tied by wire becoz tht long life as led have .