Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies.
Laser Pointers

Welcome to Laser Pointer Forums! If you are looking for a laser you may want to check out the Laser Company Top Sites List. The link will open in a new window for your convenience.


Top 50 Laser Pointer Companies - Green Lasers Top 50 Laser Pointer Companies - Blue Lasers Top 50 Laser Pointer Companies - Red Lasers
Top 50 Laser Pointer Companies - Yellow Lasers Top 50 Laser Pointer Companies - Purple Lasers Top 50 Laser Pointer Companies - Orange Lasers
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes




Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > General

Sci-Fi-Lasers

Reply
 
LinkBack Thread Tools Display Modes
Old 06-07-2012, 11:57 PM   #1
Class 3R Laser
 
tsteele93's Avatar
 
Join Date: Dec 2011
Location: South Cackalackey, USA
Posts: 2,062
Rep Power: 98
tsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond repute
Default How to turn power DOWN on cheap greenie?

I bought a couple of cheap (New Wish) <5mW greens for my (3 & 5 yrs-old) kids. They already have a 3mW and 5mW 635nm but I wanted to get them some greens to play with as well.

Unfortunately, it is hard to find on-spec greens. These came in at 12mW and 15mW.

What would be the easiest way to detune them down around 5mW.

I have thought about trying to get a cheap neutral density filter and install it in the aperture.

Any other easy ways to do this.

I tried running 1.3v eneloop rechargeables to see if that might work, but they still put out the same mW.

Thanks!
__________________
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Tom Steele

Why I'm Here

405nm tsteele93 12x build @ 545mW

445nm Survival Laser @ 1.25W - GIFTED
445nm Stainless Steel Monster with H140 diode @1.62A - 2.15W!
450nm rhd single mode @ 190mW

532nm O-like 50 mW pen from Cajun Lasers - small dot, tight beam!
532nm O-like Crown, rated @ 400mW, metered @ ~450mW with AW battery!
532nm O-like Crown rated @ 500mW, not yet tested
532nm RPL-165 @ 204mW
532nm RPL-375 @ 427mW

635nm rhd Lipstick Tube @ ~485+ mW
638nm Fat Boy @ 825mW - custom build

650nm Bolly BL-8006 @ 319mW

Laser Safety and Eye Injury
tsteele93 is offline   Reply With Quote


Laser Pointer Company Database

Top 50 Laser Pointer Companies - Green Lasers Top 50 Laser Pointer Companies - Blue Lasers Top 50 Laser Pointer Companies - Red Lasers
Top 50 Laser Pointer Companies - Yellow Lasers Top 50 Laser Pointer Companies - Purple Lasers Top 50 Laser Pointer Companies - Orange Lasers
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes


lpp



Old 06-08-2012, 12:01 AM   #2
Class 3B Laser
 
Wolfman29's Avatar
 
Join Date: Jan 2011
Location: Scottsdale, AZ
Posts: 3,826
Rep Power: 225
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Default Re: How to turn power DOWN on cheap greenie?

Err. Open 'em up and turn the pot the other way? XD
Wolfman29 is online now   Reply With Quote
Old 06-08-2012, 12:04 AM   #3
Class 3R Laser
 
jeffreythe00's Avatar
 
Join Date: Jan 2010
Location: USA, Plains, Pennsylvania
Posts: 2,491
Rep Power: 258
jeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond repute
Send a message via Skype™ to jeffreythe00
Default Re: How to turn power DOWN on cheap greenie?

A ND filter is all i can think of. The only other method I can think of is just turning the current down on the pot. IF there is even one. Alot of the greens i took apart (especially the really cheap ones) did not have a pot.
__________________
Want to be a part of the member map? Pm me!

Personal lasers
532nm 130mW Spartan
532nm 160mW Wicked lasers EVO
532nm 130mW Wicked Lasers Executive Pro: Nexus

520nm 1.4W Ehgemus custom
660nm >78mW Newwish
635nm 500mW 501B
445nm >1W 1st Gen Kryton Groove
445nm >2.7W DeadEYmo Custom
473nm 25mW re-tuned B&W Tek Labby
Wicked Lasers Torch
Radiant x4 LPM
jeffreythe00 is online now   Reply With Quote
Old 06-08-2012, 04:57 AM   #4
Class 4 Laser
 
InfinitusEquitas's Avatar
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 14,097
Rep Power: 631
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
Default Re: How to turn power DOWN on cheap greenie?

The new "newish" pens don't have pots anymore.

TBH there isn't really that much difference in danger between a 5mW and 15mW.

If you're concerned (as I would be too with young kids), you should maybe grab a couple of these?

Link.

Btw, I ended up spending $50 myself on a radioshack pen, just to make sure that when I go out, and if someone wants to see a laser, I can give them one to play with, without being paranoid. I lpmed them to confirm they weren't overspec.

Edit: I need sleep so this could be retarded... but it could be an option... what's the min input voltage needed for them? Try with a spacer and a regular AAA, or a spacer and a nimh for even less?

Last edited by InfinitusEquitas; 06-08-2012 at 04:58 AM.
InfinitusEquitas is online now   Reply With Quote
Old 06-08-2012, 01:58 PM   #5
Class 3R Laser
 
tsteele93's Avatar
 
Join Date: Dec 2011
Location: South Cackalackey, USA
Posts: 2,062
Rep Power: 98
tsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond repute
Default Re: How to turn power DOWN on cheap greenie?

I haven't tried a single AAA or an AAA Li-ion, good idea.

I did try the ~1.3v eneloop rechargeables and it didn't make a difference vs ~1.7v alkalines though.
__________________
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Tom Steele

Why I'm Here

405nm tsteele93 12x build @ 545mW

445nm Survival Laser @ 1.25W - GIFTED
445nm Stainless Steel Monster with H140 diode @1.62A - 2.15W!
450nm rhd single mode @ 190mW

532nm O-like 50 mW pen from Cajun Lasers - small dot, tight beam!
532nm O-like Crown, rated @ 400mW, metered @ ~450mW with AW battery!
532nm O-like Crown rated @ 500mW, not yet tested
532nm RPL-165 @ 204mW
532nm RPL-375 @ 427mW

635nm rhd Lipstick Tube @ ~485+ mW
638nm Fat Boy @ 825mW - custom build

650nm Bolly BL-8006 @ 319mW

Laser Safety and Eye Injury
tsteele93 is offline   Reply With Quote
Old 06-08-2012, 02:28 PM   #6
Class 3B Laser
 
Sigurthr's Avatar
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,153
Rep Power: 358
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Default Re: How to turn power DOWN on cheap greenie?

Just insert a high value resistor in series with the battery to limit current to the driver. It's a cheap green so there won't be any switchmode circuitry inside. Just limit battery current.
__________________
Amateur Multispectral Photographer
Tesla Coil Expert
Amateur Electrical Engineer
Laser Enthusiast
MMO / PC Gamer
Audiophile
Autodidact
Sigurthr is online now   Reply With Quote
Old 06-08-2012, 02:32 PM   #7
Class 4 Laser
 
InfinitusEquitas's Avatar
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 14,097
Rep Power: 631
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
Default Re: How to turn power DOWN on cheap greenie?

Quote:
Originally Posted by tsteele93 View Post
I haven't tried a single AAA or an AAA Li-ion, good idea.

I did try the ~1.3v eneloop rechargeables and it didn't make a difference vs ~1.7v alkalines though.
A lithium would provide more power if anything, I mean nimh AAA, like the eneloops. One of those with a spacer. I imagine if the laser still runs, the power will be reduced.
InfinitusEquitas is online now   Reply With Quote
Reply


Laser Pointer Company Database

Top 50 Laser Pointer Companies - Green Lasers Top 50 Laser Pointer Companies - Blue Lasers Top 50 Laser Pointer Companies - Red Lasers
Top 50 Laser Pointer Companies - Yellow Lasers Top 50 Laser Pointer Companies - Purple Lasers Top 50 Laser Pointer Companies - Orange Lasers
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes



Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On









Loading


laser pointer forums top












Laser Pointer Company Database

Top 50 Laser Pointer Companies - Green Lasers Top 50 Laser Pointer Companies - Blue Lasers Top 50 Laser Pointer Companies - Red Lasers
Top 50 Laser Pointer Companies - Yellow Lasers Top 50 Laser Pointer Companies - Purple Lasers Top 50 Laser Pointer Companies - Orange Lasers
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes



All times are GMT. The time now is 04:16 AM.


Powered by: vBulletin
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2015 Laser Pointer Forums, LLC