SST-90 AC?

[jawnn]

I want to build an AC, edison base with an SST-90, not over driven, I don't want to deal with heat sinking. I would like to get 1200 lumins....or close.
I am going to put it in a swingarm lamp so maybe I dont need a reflector, but it may help.

I have no idea how to do this and realy wish I could find a kit.

If some one can telll me where to get all the stuff and what it is that I need, I could start.

Also a diagram of what I need to build may be needed. Does it need a circuit board? or just a resister?

So far I havent even found a data page...

maybe it would be easyer to build in dc only?

 

[monkeyboy]

Does it need a circuit board? or just a resister?

I really don't think you should be attempting to build your own mains powered driver electronics.

Your best bet would be to find a mains adapter that would convert high voltage AC to low voltage DC. You probably won't find one that gives you the the {approx 3.5V 3A} you would need, so one option would be to find one that puts out a higher voltage, lower current and use a der wichel driver to give you ~2.8A and about 900lm.

Oh yeah, and you're going to need a large heatsink for that, something like a computer CPU heatsink would do, and some arctic silver thermal epoxy would be needed. 2.8A will fry the LED instantly with no heatsinking.

 

[joshconsulting]

Oh yeah, and you're going to need a large heatsink for that, something like a computer CPU heatsink would do, and some arctic silver thermal epoxy would be needed. 2.8A will fry the LED instantly with no heatsinking.

I like the idea of a CPU heatsink. Even a small stock cooler would be massive overkill. The heat dissipation is an order of magnitude above what your hand would normally provide for a flashlight body. Now I need to rig a SST-90 array in my computer WC loop and finally max out the sandwich rads I spent so much on :devil:

Plus, then you could overdrive the LED massively. Now I'm combining my flashlight hobby with my computer job. I need to get my hands on a LN2 pot and chill that SST down to -150c to see what kind of current it can take before the big blowout.

 

[csshih]

1200 lumens with no heatsinking?

you'll get that for all of a few seconds before the LED starts frying.

 

[stinky]

i want to build one too that autodials the fire department

 

[John_Galt]

i want to build one too that autodials the fire department

???


You'll need a driver, massive heat sink, and the LED. To get 1200 lumen from an SST-90, I think you'll have to drive it at 18+ amps, but good luck?

 

[stinky]

???


You'll need a driver, massive heat sink, and the LED. To get 1200 lumen from an SST-90, I think you'll have to drive it at 18+ amps, but good luck?

i was suggesting that if the light doesn't have a proper heatsink, then his house may be the heatsink

 

[John_Galt]

i was suggesting that if the light doesn't have a proper heatsink, then his house may be the heatsink

Aahhhhh... I understand.

 

[joshconsulting]

i was suggesting that if the light doesn't have a proper heatsink, then his house may be the heatsink

More likely, the LED would heat up the surrounding air for a few second, possibly melt the sleeving on the cables, turn blue and go out, never to return. I don't think you see an actual fire from an improperly heatsinked LED; it just dies. Then again, never had it happen to me...

 

[jawnn]

SST-50?

maybe if I need a big heat sink any how , I should just g for an SST-50?

Is there any web page that tells how to do this? and where to get the parts?

 

[monkeyboy]

Re: SST-50?

maybe if I need a big heat sink any how , I should just g for an SST-50?

Is there any web page that tells how to do this? and where to get the parts?

A "D bin" SSC P7 would be nearly as bright and much easier to solder and heatsink.

-Der Wichtel's buck driver is here.

-Get something like a 12V 1.5A+ switching type power supply. These are easy to find from ebay etc.

-A CPU heatsink would be easy to find any computer shop or ebay.

-Have a look over at the market place for top bin SSC P7 (D bin) or SST-50 (WJ bin). Photonfanatic sells them.

 

[joshconsulting]

Re: SST-50?

maybe if I need a big heat sink any how , I should just g for an SST-50?

Is there any web page that tells how to do this? and where to get the parts?

They will both require a fair amount of heatsinking, but if your aiming for 1k+ lummens, the SST-90 will get there much more easily, outputting more lummens with less heat and requiring less heatsinking.

 

[Packhorse]

Re: SST-50?

Yes but 2 P7's ( or better yet MC-E's) will be cheaper and open up better voltage options. 7.4 volt in the case of 2 P7's or 7.4, 14.8 or even 29.6 volt when using 2 MC-E's.
Find the closest AC-DC transformer and then just use the appropriate resistor.

 

[joshconsulting]

With proper heatsinking, the sst-90s can go much (2k+ lummens) farther.

 

[Packhorse]

With proper heatsinking, the sst-90s can go much (2k+ lummens) farther.

Sure. so will 3 MC-E's or P7's and still be cheaper and obe easier to drive. But OP only wanted 1200.

 

[stinky]

this big ol monster can handle it. cheap too, for nearly a pound of high grade copper. on closeout direct from the manufacturer Regular price: $25.99 Sale price: $2.99 http://www.thermaltakestore.com/a1254.html

 

[joshconsulting]

Sure. so will 3 MC-E's or P7's and still be cheaper and obe easier to drive. But OP only wanted 1200.

SST-90s are around $45; I have no idea where you can get high binned bare P7s for $15 each. He mentioned overdriving but acted as he didn't know how far it could go, so I assumed 1200 lummens was simply a guess at what the SST-90 could do. OP needs to provide more info...

 

[Packhorse]

No OP stated he would like to get 1200 lumen or close and NOT over driven

I get MC-Es from Cutter for $14.97 US.
C bin P7s can be had for about the same price. Sure not D bin but still capable of giving 2000 lumen with 3.

SST-90 is a great LED but its my opinion its not the best suited for this application. Its just too hard to drive.

 

[jawnn]

well I'm lost now, maybe I should just buy something?