awesome lab quality 50mw modules for 65.00+5.00 sh

styropyro · Jul 30, 2008

Re: awesome lab quality 50mw modules for 65.00+5.0

ben74 said:
Anyone making theres portable know of a good driver that can run of 3 volts that cam manage 630mA to 670mA? and a good host?

A good driver would be a simple LM317 driver (The DDL circuit). You can't push up to 1.5A out with one of those.

disma · Jul 30, 2008

Re: awesome lab quality 50mw modules for 65.00+5.0

the lm317 is a good driver, but it will take 2 ohms resistance, and 6v minimum to run it. 4aa's.

MarioMaster · Jul 30, 2008

Re: awesome lab quality 50mw modules for 65.00+5.0

i wouldn't run a portable laser with that kind of power draw unless you wanted to use some Li-ons or something

disma · Jul 30, 2008

Re: awesome lab quality 50mw modules for 65.00+5.0

ya, 6aa nimh will run it for 3 hours or more. I have a 1w 808 running from a 7.2v rc car pack, and it runs great from it @ 1.1 amps. It all depends on how much run time you want between charges. a 7.2v rc car pack should give at least 4-5 hours @ 650ma. They are 3000mah or more. the aa's (nimh) are 2100mah.

Napalm_Fire · Jul 31, 2008

Re: awesome lab quality 50mw modules for 65.00+5.0

Got the new unit. Puts out between 75 and 90mw Im guessing.. I found that when the driverboard became warm, it got buggy. It was running in that funny arch shaped TEM mode again, and was hopping to TEM01 as well... I think "as long as its cooled" applies to the board itself too. I'm building a housing and adding a fan. I'll let you know whats up when I'm done.

Napalm_Fire · Jul 31, 2008

Re: awesome lab quality 50mw modules for 65.00+5.0

built a driverboard housing w/ a 1.13" 5v fan(external psu) and its running well! starts in TEM01 but will fix when I adjust pot down and up.

The output has been consistent and I would say its more like 75mw than 90mw. takes a bit to light a match when focused.

Left it on for about 10 mins now and it is pretty cold actually. No real heat issues.

Seems to be a driverboard cooling issue.. Keep it cold and it'll keep you happy.

Napalm_Fire · Jul 31, 2008

Re: awesome lab quality 50mw modules for 65.00+5.0

yay for triple posts..

Disma.. I gotta say.. this may be a 1w diode.. The laser hasn't gotten hot at all and is running perfectly stable at the max output of the board. I think that the diode could take a bit more power, and if the diode dies, the crystals certainly have a good chance of running on a higher power diode. they only begin to lase properly at around the highest power on the board..

disma · Jul 31, 2008

Re: awesome lab quality 50mw modules for 65.00+5.0

ya, I noticed a similar operation from mine. I am tempted to try putting 800ma into it and see what it does. I will try it when I get the 317 driver built... but I cant work on that until I get my air conditioner fixed.. gees its hot in here.

ben74 · Jul 31, 2008

Re: awesome lab quality 50mw modules for 65.00+5.0

800mA like to see that and post what happens. I hope you get your air conditioner fixed and you are so lucky as its been raining in Scotland for the last few days but there has been a lot of mist so its not all that bad.

disma · Jul 31, 2008

Re: awesome lab quality 50mw modules for 65.00+5.0

I sure wish it would rain here, its 105 deg.

Ya, I cant wait to see what will happen, I hope it does 150mw.

Napalm_Fire · Aug 1, 2008

Re: awesome lab quality 50mw modules for 65.00+5.0

If it does 150mw, I'm gonna have to build a LM317.. lol.. Right now I gotta stick with my stock driverboard because I need to adjust the pot at the beginning of every turn on to kick it out of TEM01..

Napalm_Fire · Aug 1, 2008

Re: awesome lab quality 50mw modules for 65.00+5.0

Its been running for another 3 hours, total 7 1/2 hours since I've gotten it and its fine and dandy. I got an awesome unit I do say..

If you need a fan, check ebay often for "Micro fan" auctions, or anything along the lines of "small".. lol.. They work awesome and you can put a screw right into the fan, and into the vreg heatsink.

disma · Aug 1, 2008

Re: awesome lab quality 50mw modules for 65.00+5.0

I have the perfect fan for it, a small centrifugal blower about 2 inch diameter, originally from an asus mb.

Napalm_Fire · Aug 2, 2008

Re: awesome lab quality 50mw modules for 65.00+5.0

Any pics of the fan? I may decide to beef mine up a bit or over volt it to get some more airflow.

Heres some pics of the module and the driverboard+mount I've made. Just to give some rough ideas of how I cooled it and powered it.

disma · Aug 2, 2008

Re: awesome lab quality 50mw modules for 65.00+5.0

wow, I love that last pic!

Ill take a pic of the fan when I get a chance later.

Max

disma · Aug 2, 2008

Re: awesome lab quality 50mw modules for 65.00+5.0

ok, I have built an lm317 driver with 3 x 5ohm resistors in parallel. It measures 720ma on the meter, and is putting out 110mw average. before on the 115 ps, this module was doing 107mw peak.

awesome lab quality 50mw modules for 65.00+5.00 sh

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