Marconi,
You build 1 Watt greens?
Too bad a 1 Watt red is not possible
Maybe a DPSS red is do-able Pump at =>808 and get 650 out
Marconi,
You build 1 Watt greens?
Too bad a 1 Watt red is not possible
Maybe a DPSS red is do-able Pump at =>808 and get 650 out
Hi!
The peltiers work with a maximum voltage of 1,9 VDC and a current of 3A. I will design together with frank from laserblog a new TEC controler only for cooling diodes. No heating. And the operating voltage of the controller will be 5 VDC. So I will design it that you can connect 2 of those peltiers!
here is the ebay link:
http://cgi.ebay.de/2-Stck-Peltier-El...QQcmdZViewItem
Best regards
Karl
Hehe, No .. I am modding one for a friend that was a TTL unit.
Its not a conventional circuit to start with either.. so Its taking me a while without reinventing the wheel on this one.
Sorry, I dont make any green ones anymore..however, I have been thinking about it again, dunno, I think that market is covered well.
Last nite I got over 900mW of red..of course if I add two more diodes to the mix..one watt would be easy.
Starburst:
Cool, I hope that with a Qmax of 4watts is enough for you., with the size of the mounts I dont think you have anything to worry about.
Im using a single DT6-4L http://www.marlow.com/Products/produ...p?ProductID=55
It has a Qmax of 20w..I have quite a few of these so I should use them,
Im just gunna tickle it a little with the Hytek HY-5600 controller IC , I can series the peltiers up to 20v if I want.
But I am only using a 12v supply for the TEC at the moment. I may change it to 5volts as the peltier only needs 6volts .
I have a current limit of 2amps right now and if I need more I can parallel another controller for 4amps. Or, I can add a driver FET at the output for more amps. But at 2 amps I can freeze the diodes now , hehe.
When I run out of these chips I will use the LM-324 single-ended FET design , its easy and small.
Last edited by marconi; 04-11-2007 at 14:53.
"My signature has been taken, so Insert another here"
http://repairfaq.ece.drexel.edu/sam/laserfaq.htm
*^_^* aka PhiloUHF
How many diodes are in the mix now? 4?Last nite I got over 900mW of red..of course if I add two more diodes to the mix..one watt would be easy.
Yep, four 250's but Im only running them at 200 for maximum life
"My signature has been taken, so Insert another here"
http://repairfaq.ece.drexel.edu/sam/laserfaq.htm
*^_^* aka PhiloUHF
Hi!
Yes, i tried a few other peltier elements. But this was the largest for those mounts i use. I when I put the maximum current through the elements, the mounts get really cold. I think this is good enough.
Marconi, where do you get those diodes? Maybe when the setup is finished, I upgrade to 4x 250 mW instead of 4x 180 mW.
Karl
And that would be Mystery Number One on the forum right now.
I think it's a secret, but I'll settle for one question answered if possible. Are they single mode or some rare narrow stripe multimode diode? And a possible second answer, as I beleive in pushing my luck: is their 250 mW rating a full CW rating, and do they have a pulse rating?
I don't know if I can deduce much from answers to those questions, but they are the best questions I can figure out to ask, if the direct question is a no-go.
Trying to get Marconi's secret recipe eh, you-all?
Hell yeah! Fire burn and cauldron bubble!
I'll be working with my Rohm diodes though, for good or ill. Got to use what I've got...
hehe good luck
How are the Rohm's going Doc?