It is Here.!!!!! 300mW "635nm" Mitsubishi.....

[bennett326]

is that condensation on the mount ..

 

[rhd]

is that condensation on the mount ..

Yep. Just for fun after I was done I left the mount running for ten or fifteen minutes and let the snow accumulate

 

[LASER66]

Glad I could help out there!

Awesome. They Must have Read my Post.

This is Cheaper then RayFoss.:wave:

Iam thinking of grabbing one. But not sure yet.

:undecided:

@RHD...
I'm sure you will also notice better power efficiency, and less roll off in power at higher currents with the TEC. Per data sheet, there is 10nm shown as a temperature dependence. Nice test!
Can you show any data at high powers based on temp tests you ran?
And watch out... That thing might get airborne with two of those powerful fans!

I also have some low cost TEC's with heatsink listed on my LPF page; see signature. Not a hijack, Laseerer !

 

[andyf97]

Where can I buy 2 x ML501P73, anyone have some in stock?

 

[rhd]

Where can I buy 2 x ML501P73, anyone have some in stock?

O-Like had them, but they're out of stock. I'm looking for one too.

 

[Ghostchrome]

Yep. Just for fun after I was done I left the mount running for ten or fifteen minutes and let the snow accumulate

Need a tutorial! :bowdown:

 

[Helios]

TECs are pretty simple. You just need the right power source to meet the specs and then its done. Put a finned heatsink on one side and the other side on what ever you want to keep cool. Current one way will cause one side to heat and the other to cool, if you reverse it the effect is reversed.

 

[Cyparagon]

Yes, but keeping it at a stable temp is more tricky. I was able to use a computer fan-speed-controller, but I needed to add a comparator, and a NPN or relay. Even then, it only regulates to +/-3F in specific ranges. I might have to build something from scratch.

 

[chipdouglas]

Yes, but keeping it at a stable temp is more tricky. I was able to use a computer fan-speed-controller, but I needed to add a comparator, and a NPN or relay. Even then, it only regulates to +/-3F in specific ranges. I might have to build something from scratch.

oh, no big deal =p

 

[Bionic-Badger]

Actually, you should use the output of the laser as the feedback for regulating the TEC, not the temperature. Maybe a photodiode or something near the output that can observe some of the splash from the laser, or maybe some of the output if it goes through a prism (good if you're using those beam correcting prisms).

 

[Cyparagon]

The idea is to test how it behaves when cooled, not necessarily to keep the output stable.

 

[HTID]

I was just wondering if someone could please suggest for me a safe current to run the 300mW 635nm Mitsubishi at? i will use it inside a pointer (g2 lens, small heatsink, and thermal grease) with very low/short duty cycles of around 5-10sec, i am interested in a high output/ safe current range...

 

[LORDJET]

800 mA, or less.

 

[HTID]

from reading some previous posts i assume that 750mA seems to be about right?

 

[Garoq]

from reading some previous posts i assume that 750mA seems to be about right?

I'm running mine at 750mA and getting a little over 400mW with an AR coated acrylic lens.

 

[Johnyz]

Just finished my build, I have this little jewel powered by a custom buck driver (from a single li-ion), current approx. 500-600mA and I'm getting 390mW with three element AR coated. Will post pics soon.