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Old 07-03-2008, 04:39 PM #1
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Default fs: bluray pen (SOLD)

i have a new bluray pen with an 803 diode with a rckstr driver set at 100ma and metered at 125mw and takes 10440 batts asking $130
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Old 07-03-2008, 04:40 PM #2
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Default Re: fs: bluray pen

pic2 meter
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Old 07-03-2008, 04:42 PM #3
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Default Re: fs: bluray pen

beam shot
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Old 07-03-2008, 04:43 PM #4
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Default Re: fs: bluray pen

Quote:
Originally Posted by jake21
pic2 meter

Move the laser away from the TEC and test it again.

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Old 07-03-2008, 05:01 PM #5
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Default Re: fs: bluray pen

had to charge the batts lol
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Old 07-03-2008, 06:36 PM #6
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Default Re: fs: bluray pen (SOLD)

How can 100mA outputs 125mW after the lens :-/
What's resisors values on the driver?

At 100mA I can only get <80mW after the plastic lens :-/

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Old 07-03-2008, 07:13 PM #7
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Default Re: fs: bluray pen (SOLD)

idk it rkcstr driver
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Old 07-03-2008, 07:33 PM #8
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Default Re: fs: bluray pen (SOLD)

Quote:
Originally Posted by jake21
idk it rkcstr driver
Yes, I know it's a rckstr driver, but what's values (numbers) written on the SMT resistors. The values in Ohms determine the current in mA.
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Old 07-03-2008, 08:03 PM #9
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Default Re: fs: bluray pen (SOLD)

two 25r5 resistors
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Old 07-03-2008, 08:27 PM #10
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Default Re: fs: bluray pen (SOLD)

Ok, thanks.
But I still can't figure out how 98mA (two 25.5 ohm in parallel) is able to output 125mW :-/, 50% more power than any of the 803t Diodes I have seen.
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Old 07-03-2008, 08:32 PM #11
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Default Re: fs: bluray pen (SOLD)

im not sure eaither this is my secound pen laser i made useing a rkcstr driver,i asked him did he have one close to 100ma, he did and that is what i used in the pen
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Old 07-03-2008, 10:05 PM #12
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Default Re: fs: bluray pen (SOLD)

Quote:
Originally Posted by TheMonk
Ok, thanks.
But I still can't figure out how 98mA (two 25.5 ohm in parallel) is able to output 125mW :-/, 50% more power than any of the 803t Diodes I have seen.

Something doesn't add up :-/

I would love to test this laser 8-)

'Course I'm too cheap to buy it just to test it :-[

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Old 07-03-2008, 10:29 PM #13
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Default Re: fs: bluray pen (SOLD)

Quote:
Originally Posted by TheMonk
Ok, thanks.
But I still can't figure out how 98mA (two 25.5 ohm in parallel) is able to output 125mW :-/, 50% more power than any of the 803t Diodes I have seen.
Yeah, it really doesn't make sense.. The most efficient diode out of a batch of 23 did 120mW at 125mA..

I found another one, that actually does 1mW per 1mA. Both after a plastic lens. But i haven't seen more than 1mW per 1mA.


This is strange.. How do your other blu rays at 100mA measure on this meter, Jake?
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Old 07-03-2008, 10:39 PM #14
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Default Re: fs: bluray pen (SOLD)

i don't no this is the second one i made so fare the other one i sold the other day was 140MW and i think it was near 140ma im guessing it might be the batts, it seams when the batts gets low it drops to 105-110mw but when they are charged up its 125-130mw its pritty nice laser i got it to light a white tip match
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Old 07-04-2008, 12:44 PM #15
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Default Re: fs: bluray pen (SOLD)

Jake, you're using a rkcstr driver.. Two Li-Ions are hardly enough to keep it in regulation for half the battery capacity, remember? The current is only correct when the batteries have more than 7.7V.. Two full Li-Ions have 8.4V, empty they have 6V, so the current and the power start dropping as soon as the battery voltage drops from 8.4 down to around 7.7V.. This means, the batteries would have to be recharged before they even drop to their nominal voltage. For optimal battery use with a PHR and a rkcstr driver, you need three Li-Ions. If you select batteries so that they still have more than enough voltage when they are empty, the power of the laser stays the same all the time, untill the batteries are completelly flat.


But this has nothing to do with the measured power. When the batteries are completelly full, the current IS what you set it to. No more and no less.

The other laser at 140mA could really have been 140mW.. I have seen one diode so far, that could do that.
But 140mW at 100mA is weird..


Jake, could you perhaps replace the tailcap with your DMM in a high current measuring range (over 2A, 20A preferably), and report what you measure? EDIT: With FULL batteries please! And make sure you also get 140mW while doing this..

With a linear driver, the current from the battery is the same as the current through the diode. This would answer the question about your misterious diode.
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Old 07-05-2008, 06:26 PM #16
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Default Re: fs: bluray pen (SOLD)

Hey Jake!

Did you measure the current draw from the batteries?
I would really be interested in what it is... And you should be too.

I mean, it could be up to 140-150mA, depending on the efficiency of this particular diode..
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