gt40
Enlightened
After testing 4 aspheric 3" lens, I settled with the dx 75mm lens. It really puts out a nice beam without spill and the price is right. For the host, I am making a bigger version of my sst90 with magnetic ring switch detailed here:
http://www.candlepowerforums.com/vb/showthread.php?t=279245&page=3
Changes:
1. (3) 26650 batteryspace batteries
2. Emerson 20 amp driver
3. Larger head
4. Mount thermister directly under the led
5. 75mm DX aspheric lens
I built version 1.0 with an aluminum/copper core heatsink and the raptor driver and it works great at 8-9 amps but there is room for improvement-
At 10 amps, the driver protection turns on till the thermister heats up because I mounted it too far from the led and no possibility of pushing the led any higher than that.
As a result, I am trying out this driver:
http://www.powerconversion.com/assets/lf_sil20c2_1199509977_techref.pdf
It can handle up to 20 amps, has low voltage lockout and over current protection. Basically ldo10c's big brother. I figure I can use it to drive an sst90 to within an inch of its life:devil:
Now some pics of the initial build so far. I will clean things up once the design is finalized:
Side shot of the heatsink:
Heatsink tail with delrin insert machined:
Heatsink head with groove for thermister to be mounted under the led:
Emerson driver in heatsink:
Emerson driver:
Light head with 75mm lens:
Light head with old heatsink:
Light body:
Beamshot at 10 amps with old driver heatsink:
Farther away:
That is it so far. The light is switched on with a reed switch and a magnet imbedded in a knurled ring like my smaller light. Once the basic design is finalized, I will focus on making the body shape better and finishing it. I am hoping for 12+ amp stable range out of an sst90 with the massive head and copper heatsink driven by the emerson driver. 12000mah worth of battery should give it a semi reasonable run time...
Thanks for looking.
http://www.candlepowerforums.com/vb/showthread.php?t=279245&page=3
Changes:
1. (3) 26650 batteryspace batteries
2. Emerson 20 amp driver
3. Larger head
4. Mount thermister directly under the led
5. 75mm DX aspheric lens
I built version 1.0 with an aluminum/copper core heatsink and the raptor driver and it works great at 8-9 amps but there is room for improvement-
At 10 amps, the driver protection turns on till the thermister heats up because I mounted it too far from the led and no possibility of pushing the led any higher than that.
As a result, I am trying out this driver:
http://www.powerconversion.com/assets/lf_sil20c2_1199509977_techref.pdf
It can handle up to 20 amps, has low voltage lockout and over current protection. Basically ldo10c's big brother. I figure I can use it to drive an sst90 to within an inch of its life:devil:
Now some pics of the initial build so far. I will clean things up once the design is finalized:
Side shot of the heatsink:
Heatsink tail with delrin insert machined:
Heatsink head with groove for thermister to be mounted under the led:
Emerson driver in heatsink:
Emerson driver:
Light head with 75mm lens:
Light head with old heatsink:
Light body:
Beamshot at 10 amps with old driver heatsink:
Farther away:
That is it so far. The light is switched on with a reed switch and a magnet imbedded in a knurled ring like my smaller light. Once the basic design is finalized, I will focus on making the body shape better and finishing it. I am hoping for 12+ amp stable range out of an sst90 with the massive head and copper heatsink driven by the emerson driver. 12000mah worth of battery should give it a semi reasonable run time...
Thanks for looking.
Last edited:
