100W LED
A 100W LED generates a lot of heat.
So before start experimenting, some precautions must be taken.
So before start experimenting, some precautions must be taken.
I used a old PC heatsink with fan to cool it down.
Thermal paste is necessary to optimize the heat transfer between the LED and the heatsink
Soldered some wires on the led terminals
I also installed a special lens to focus the light.
The LED specifications are: Vf 30-36V and If 3000mA
To power it, I used an old laptop power supply in combination with a DCDC boost converter so I can set a constant current for the LED.
The fan is powered through a 7812.
This is still a test setup, the cables and connections need additional attention.
To power it, I used an old laptop power supply in combination with a DCDC boost converter so I can set a constant current for the LED.
The fan is powered through a 7812.
This is still a test setup, the cables and connections need additional attention.
As a start I set the voltage and current at the minimum, just enough to make the LED light up.
Now you can clearly see all the separate LED chips.
Now you can clearly see all the separate LED chips.
Next I increased the voltage to about 40V
and set the current to a fixed value of 3A
and set the current to a fixed value of 3A
Of course I had to test it now :)
I made a little video, but it's not very easy to handle yet.
It needs a construction to put all the different parts in.
I made a little video, but it's not very easy to handle yet.
It needs a construction to put all the different parts in.