Introduction: Flashlight 50W 3V
In this case I built a flashlight with a 50W 3V LED
I get the LED recicling a damaged LED 50W 36V. To convert the LED from 36V to 3V is here.
Step 1: Mounting the LED
First get parts: An aluminum heat sink, dissipating cream and an old flashlight.
I installed the LED by drilling holes on the heat sink, put some dissipating cream and fasten with screws. I made other holes for the wires.
Step 2: Installing the Battery Positive Contact
Solder a spring on a perforated plate project, then I soldered a pins that will support the contact.
I cut the plate and subjected to pressure in the heat sink, then soldered the red wire. This wire go to the +
Step 3: Installing the Base of the Flashlight
I used an old flashligt base and cut It to fit in the guides of heat sink. I made a hole to pass the black wire.
As the chassis lamp is aluminum is enough that the cable do contact to close the circuit.
I added a bit of superglue to secure the base.
Step 4: Using My New Flashlight
As you can see, the flashlight lights up pretty well. I used a 3.7V 2000 mA rechargeable battery.
It stays on approximately 1 hour more less ;)
6 years ago
Nice, but you probably need some active cooling (fan) at that power, no? Also, your battery is 7.4 Wh, so it cannot do 50 W for one our. Most likely you are only getting around 7 W of power on the LEDs (which explains why the LED did not overheat without active cooling).