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Old 07-15-2010, 03:18 PM #1
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Default [WTB] <50mW 445nm Pointer

Hi guys! To the pen pros here:

Im in search for a low-power 445 build. I know it has so low power just about threshold and is hard to keep there, but maybe with some tricks (acrylic lens, filter etc) you could build be one near as bright as 5mW 523?
Anyway i will take anything below stable 50mW. thats i can handle safely


- would prefer NewWish or jayrob pen Hosts but will take anything compact
- would prefer AAA over Lithiums but will take 10440 or even 18650 too


Please make me offers! i take the most affordable for me then Thanks


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Old 07-17-2010, 12:15 PM #2
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Default Re: [WTB] <50mW 445nm Pointer

*pusch*
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Old 07-17-2010, 04:29 PM #3
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Default Re: [WTB] <50mW 445nm Pointer

Quote:
Originally Posted by Xer0 View Post
*pusch*
Is it being powered by 2 10440's OK? My experience with powering this diode with regular AAA's are less than acceptable. I have a module on my desk that I could re-work into a low powered pointer.

You realize that lower output does NOT mean lower price in a custom made laser, right?

It takes just as long, and uses the same parts, to build a 50mW laser as it does to build a 1W laser.

OK. It is a little less expensive because the host is less expensive.

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Old 07-24-2010, 10:30 AM #4
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Default Re: [WTB] <50mW 445nm Pointer

How much would you aproximate?
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Old 07-25-2010, 08:48 AM #5
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Default Re: [WTB] <50mW 445nm Pointer

The problem is that the threshold current is like ~270mA. So even though the output may be low it'll still be eating up a few watts. So the diode will be VERY inefficient at those currents.

IMO you should get a driver that can accept a TTL mod input and run it with a simple 555 timer circuit with a very high frequency but low duty cycle, like 5%. Then the diode will be pulsed and the mean output will be 1/20th of the the normal power. In other words the diode is still being run at like 600mA but only 5% of the time.

All that will be hard to put in a handheld host but it can be done.

-Tony
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Old 07-25-2010, 09:20 AM #6
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Default Re: [WTB] <50mW 445nm Pointer

Why you don't join CNI GB
NOW 447nm CNI lasers & GB #11
It should not cost you too much, the 5mW cost $40
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Old 07-25-2010, 09:30 AM #7
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Default Re: [WTB] <50mW 445nm Pointer

Quote:
Originally Posted by Dr.Laser View Post
Why you don't join CNI GB
NOW 447nm CNI lasers & GB #11
It should not cost you too much, the 5mW cost $40
The $45 pens in the GB are GREEN (532nm).

The only 445nm lasers in the GB are <500mW at $295

Quote:
Originally Posted by Xer0 View Post
How much would you aproximate?
Diode = $50
Driver = $17 (or $28)
Module = $5
Host = $15
Batteries = $7
Misc. = $5
Labor = $50
Shipping = $12
PayPal fees = $5

Total = $166 (or $177)


Peace,
dave
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Last edited by daguin; 07-25-2010 at 09:35 AM.
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Old 07-25-2010, 09:46 AM #8
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Default Re: [WTB] <50mW 445nm Pointer

Quote:
Originally Posted by daguin View Post
The $45 pens in the GB are GREEN (532nm).

The only 445nm lasers in the GB are <500mW at $295
i see there is confusing there
RA_pierce was referring to 5mW 445nm pen and glenn quoted the 5mW greenie
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Old 07-25-2010, 10:02 AM #9
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Default Re: [WTB] <50mW 445nm Pointer

Yes, I also didnīt believe my eyes. But seemed to be too good to be true
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405nm >> Wickedlasers SONAR by lazeerer peak@968mW
445nm >> Kryton Smooth by lazeerer peak@2075mW
453nm >> Lipstick by rhd peak@158mW
473nm >> Optotronics RPL-B peak@112mW
515nm >> Skylasers HL peak@41mW
532nm >> Novalasers Alpha HP peak@284mW
589nm >> CNI PGL-III-A peak@89mW
594nm >> Laserglow Rigel peak@4mW
635nm >> MXDL by DTR peak@38mW
642nm >> Saillaser peak@23mW
660nm >> CR2 by lazeerer peak@524mW
685nm >> MXDL by lazereer peak@42mW

Above lasers measured with an Ophir nospin LPM


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