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ArcticMyst Security by Avery

Modified dx200

D

danq

0
Joined
Sep 18, 2007
Messages
835
Points
18
As long as there is something in the device limiting current, the available battery current makes no difference. If you had Hoover Dam attached to your laser, as long as that dam's output was DC and regulated to your target voltage, you'd be ok (and powered up for life).

In an incandescent light, the current is regulated by its resistance (and a relatively stable input voltage); in a laser or a led, the current is usually regulated by the circuitry (although some led's may get away with no regulation as long as they are carefully matched to their power supply).

So go ahead, pile on the batteries! just keep 'em side by side, parallel-parked so to speak.
 





Benm

Benm

0
Joined
Aug 16, 2007
Messages
7,896
Points
113
anways thank for any replies i should be getting the battries soon and i will make a holder to go with my laser if it is safe and does not kill the diod by giving it to much current.
Click to expand...

Why are you using batteries at all? Sure putting 10 in paralel will reduce the internal resisance tenfold, but i doubt the internal resistance of CR123's is much of a problem to begin with.

Wouldn't it be easier to just get a regulated power supply that provides a solid 3.0 volts from mains current?

As far has i've read here, current control in DX lasers isn't built very well, so their output varies with input voltage quite a bit. There defnitely is limiting circuitry in there, it just doesnt work all that well.
 
T

Things

0
Joined
May 1, 2007
Messages
7,517
Points
0
hmmm i have pumped about 5 volts into a DX30 and it has survived quite well! oh the current was about 500ma in
 
f22warzone

f22warzone

0
Joined
Sep 8, 2007
Messages
759
Points
0
becaus i still want portable power but i dont want to have to constantly change out battries. its kinda an on the go lab unit for like science projest and stuff. still able to be substaind for periods of time but dosent need to be pluged into the wall
 
L

laserfreak3d

0
Joined
May 24, 2007
Messages
283
Points
0
f22warzone said:
yes it still has the ir filter. i didnt take it that far apart and the 2 3vcr123 battries are in paralles not series the 8 nimh are in series. sorry it was like 11pm at night when i had finishd and had taken pictures. i cant really get a beam shot becaus the camera sucks lol i tried to get one and all that showd up was black with a spot whare the dot was it didnt eve get the green that lit up the room.  anways ya lol i was plaing with it last night and i fould this nice tvdinner tray lol it only took like 1 min to burn throu all 3 sides if i held it steady enough it was cool i love this thing : )

here is an attemped beam shot with the camra
Click to expand...

it does not have a ir filter in that picture at least
 
laserrod

laserrod

0
Joined
Aug 3, 2007
Messages
342
Points
0
Man I am mad because my (fake)DX TRUE 100mW laser didn't last 1 hour.
I measured @.5 amp with 2.8v input and .7 amp with 3.2 input.
The diode became a hot, deep-red LED.
It's a open can TO-9 808nm LD pump.
Now give me some DATA here folks, I feel that pesky black cloud zaped me again!

I thought buying the 100mW instead of the 200mW would give me the same laser guts, but tamed down to last longer. I only gave it more volts briefly to check circuit regulation(lousy).

Surgery time:
Use pipe cutter to get the module then split the copper tube w/Mr. Dremell stone. (no heat on anything)

Laser module: .75x2.5mm crystal set butted against the diode and opposite the copper threaded slug holding that precious NdYVO/KTP crystal is a cemented dbl concave expander lens (done by craftsmen) followed by the screw-on collimater lens.

Now I've never heard about these expander lens's in DPSS lasers! 30mW has one too!
I feel like Christopher Columbus! :eek: (mega hours laser study not as good as taking something apart right?) See, U learn something everyday or your fried.

I thought it was a mirror but I see AR coating on it. It spreads beam better than coll. lens.

The photodiode in the LD was not connected. The whole copper module lenth is 30mm
and Newwish is not anywhere on it. My 30mW DX says www.Newwish.com on the copper diode retainer.

Tell me something I don't know besides I should have spent another $20 for a DX 200?

Circuit board identicle to 30mW one exept: 1 ohm stacked 3 in parallel, Big NPN current sink, Pot really works! some res. change, omitions.

I need some feedback to help me cope with LASER BURNOUT :'(

EXAMPLE: the 200 module has Newwish on the ring. (remove the foam donut and look past the tiny circuit board inside) etc...

I complained to DX that they are selling clones as True Laser and they said......................

Do I have a case here for credit??

Signed,
man on 35mW backup laser :'(
Can barely burn my way out of a trash bag.
 
C

chimo

0
Joined
Jun 20, 2007
Messages
650
Points
0
Did you take any pictures?

Laserrod said:
Man I am mad because my (fake)DX TRUE 100mW laser didn't last 1 hour.
I measured @.5 amp with 2.8v input and .7 amp with 3.2 input.
The diode became a hot, deep-red LED.
It's a open can TO-9 808nm LD pump.
Now give me some DATA here folks, I feel that pesky black cloud zaped me again!

I thought buying the 100mW instead of the 200mW would give me the same laser guts, but tamed down to last longer. I only gave it more volts briefly to check circuit regulation(lousy).

Surgery time:
Use pipe cutter to get the module then split the copper tube w/Mr. Dremell stone. (no heat on anything)

Laser module:  .75x2.5mm crystal set butted against the diode and opposite the copper threaded slug holding that precious NdYVO/KTP  crystal is a cemented dbl concave expander lens (done by craftsmen) followed by the screw-on collimater lens.

Now I've never heard about these expander lens's in DPSS lasers! 30mW has one too!
I feel like Christopher Columbus! :eek: (mega hours laser study not as good as taking something apart right?) See, U learn something everyday or your fried.

I thought it was a mirror but I see AR coating on it. It spreads beam better than coll. lens.

The photodiode in the LD was not connected. The whole copper module lenth is 30mm
and Newwish is not anywhere on it. My 30mW DX says www.Newwish.com on the copper diode retainer.

Tell me something I don't know besides I should have spent another $20 for a DX 200?

Circuit board identicle to 30mW one exept: 1 ohm stacked 3 in parallel, Big NPN current sink, Pot really works! some res. change, omitions.

I need some feedback to help me cope with LASER BURNOUT :'(

EXAMPLE: the 200 module has Newwish on the ring. (remove the foam donut and look past the tiny circuit board inside) etc...

I complained to DX that they are selling clones as True Laser and they said......................

Do I have a case here for credit??

Signed,
man on 35mW backup laser :'(
Can barely burn my way out of a trash bag.
Click to expand...
 
B

BlueFusion

0
Joined
Aug 15, 2007
Messages
1,880
Points
0
internal resistance of 98% of batteries =miniscule beyond concern. hundredths of an ohm.
 
L

laserfreak3d

0
Joined
May 24, 2007
Messages
283
Points
0
Laserrod said:
Man I am mad because my (fake)DX TRUE 100mW laser didn't last 1 hour.
I measured @.5 amp with 2.8v input and .7 amp with 3.2 input.
The diode became a hot, deep-red LED.
It's a open can TO-9 808nm LD pump.
Now give me some DATA here folks, I feel that pesky black cloud zaped me again!

I thought buying the 100mW instead of the 200mW would give me the same laser guts, but tamed down to last longer. I only gave it more volts briefly to check circuit regulation(lousy).

Surgery time:
Use pipe cutter to get the module then split the copper tube w/Mr. Dremell stone. (no heat on anything)

Laser module:  .75x2.5mm crystal set butted against the diode and opposite the copper threaded slug holding that precious NdYVO/KTP  crystal is a cemented dbl concave expander lens (done by craftsmen) followed by the screw-on collimater lens.

Now I've never heard about these expander lens's in DPSS lasers! 30mW has one too!
I feel like Christopher Columbus! :eek: (mega hours laser study not as good as taking something apart right?) See, U learn something everyday or your fried.

I thought it was a mirror but I see AR coating on it. It spreads beam better than coll. lens.

The photodiode in the LD was not connected. The whole copper module lenth is 30mm
and Newwish is not anywhere on it. My 30mW DX says www.Newwish.com on the copper diode retainer.

Tell me something I don't know besides I should have spent another $20 for a DX 200?

Circuit board identicle to 30mW one exept: 1 ohm stacked 3 in parallel, Big NPN current sink, Pot really works! some res. change, omitions.

I need some feedback to help me cope with LASER BURNOUT :'(

EXAMPLE: the 200 module has Newwish on the ring. (remove the foam donut and look past the tiny circuit board inside) etc...

I complained to DX that they are selling clones as True Laser and they said......................

Do I have a case here for credit??

Signed,
man on 35mW backup laser :'(
Can barely burn my way out of a trash bag.
Click to expand...


yea those newwish 100 and 200 mw pointers are crap also as far as i know the dont have a ir filter
 
f22warzone

f22warzone

0
Joined
Sep 8, 2007
Messages
759
Points
0
i dont kno if i would call them crap
i have had mine for over 3 monts now and its still working great and its still just as powerfull as the first day i got it. tho it probly dosent have a sufficent ir filter, it burns stuff and burns it quick witch was what i wanted a nice powerfull laser that could burn and the beam could be seen for cheep and i got just that.

watch the thing break tomorrow :| i would be mad
 
S

Shilood

0
Joined
Oct 11, 2007
Messages
107
Points
0
I think the consensus was all the NewWish lasers have IR filtering. That doesn't mean the filter is dense enough for lasers >50mW however. Best to assume they're leaking enough to be dangerous, which is only really a problem when burning something (intentionally causing specular reflections while your eyes are fairly close.) The best pump diodes I've seen specs for have a 16 degree full beam divergence (around 140mRad), so I would expect that even after passing through the collimation lense set designed for 532nm, the NIR portion of energy escaping would be fairly divergent. Not to say it doesn't represent a possible danger, just suggestion that at range the power would not be intense enough to be much of a worry.
 
Benm

Benm

0
Joined
Aug 16, 2007
Messages
7,896
Points
113
I agree on the divergence thing, it's so wide the aperture hole actually blocks some of it and the rest comes out in a flashlight-like pattern. However, i've seen the red 808 nm light come out and it was visible to the naked eye hitting some paper... so the IR filter can't be that efficient if you ask me ;)
 
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