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Old 07-14-2016, 07:27 PM #1
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Default Need help building laser pointer

So i just bought a 50mw laser diode module and i also have an empty laser pointer shell (it has a battery) the laser module fits perfectly in the shell but for some reason the laser pointer wont turn on. The laser module is listed in the links section. But im using a BTL 18650 6000 mAh 3.7V battery. Oh and lastly the module had a red and blue wire but I stripped them cause they were no use. Is the module not compatible with the battery?! What did i do wrong


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Old 07-14-2016, 07:37 PM #2
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Default Re: Need help building laser pointer

Do you have a link to the module? What host are you using? Pictures of how you've set it up (Host, wiring, battery polarity, all that nice stuff)? You aren't giving us much to go on here.
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Last edited by diachi; 07-14-2016 at 07:37 PM.
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Old 07-14-2016, 08:09 PM #3
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Default Re: Need help building laser pointer

Industrial Lab 3VDC 532nm Green Beam Laser Lazer 50mW Diode Module | eBay
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Old 07-14-2016, 08:11 PM #4
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Default Re: Need help building laser pointer

INDUSTRIAL/LAB 3VDC 532nm Green Beam Laser Lazer 50mW Diode Module
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Old 07-14-2016, 08:13 PM #5
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Default Re: Need help building laser pointer

So basically i just slid the module into the hole on the shell so the spring from the module was touching the battery and then i put the cap on
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Old 07-14-2016, 08:16 PM #6
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Default Re: Need help building laser pointer

Quote:
Originally Posted by Rickyspencer View Post
So basically i just slid the module into the hole on the shell so the spring from the module was touching the battery and then i put the cap on
What way did you put the battery in? Is the shell making good electrical contact with the module? You should a read dead short (or very close) between any point on the shell/host and the brass case of the module when testing with a multimeter.



Edit... Again, pictures of how you have it set up would be helpful.

Edit 2: Also possible that your Li-Ion cell is giving the module too much voltage. Unprotected Li-Ion cells do 4.2V on a full charge. The module needs only 3V.
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Last edited by diachi; 07-14-2016 at 08:19 PM.
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Old 07-14-2016, 08:32 PM #7
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Default Re: Need help building laser pointer

That is not a 50mW laser diode module, it is a DPSS module, these come in 3V and 5V, this one is a 3V, notice the button on the driver. This is specifically made for use in a pen host that uses 2 AAA batteries, that button turns it on and off. If you connect it to a 3V source you can test it to see if it still works. These are always case positive, if you reverse polarity it's toast.

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Old 07-14-2016, 08:33 PM #8
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Default Re: Need help building laser pointer

If your using an 18650 battery that host must have a tail switch or other type. That link is showing a module with a momentary switch that you might need to bridge.

Oh yeah like Pi said 3.7 to 4.2V will likely be to much.
If your still set on this host Fastech has these modules in 5V form for around $6 rated at 5mw but are closer to 80mw. Just a thought.

Last edited by GSS; 07-14-2016 at 08:40 PM.
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Old 07-14-2016, 08:34 PM #9
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Default Re: Need help building laser pointer

So the module has good contact with the battery cause i can feel the tension when screwing on the cap but here is pictures of the setup oh wait i cant upload pictures from my phone as their not the rigjt format

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Old 07-14-2016, 08:37 PM #10
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Default Re: Need help building laser pointer

Quote:
Originally Posted by Rickyspencer View Post
Im new to lasers... What the hell does that mean����

What does what mean? And your pictures aren't working.

Again - what way did you have the battery in?
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445nm | Sanwu Laser Pocket Series | 400mW Metered
445nm | NDB7242E Pen Build | 60mW Metered | >>Build Thread<<
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488nm | Spectra Physics 163 Argon | ~30mW Metered
515nm | PL515 Pen Build | 50mW Metered | >>Build Thread<<
520nm | Laserlands 520 | 5mW | Review Unit | 3mW metered | >>Review<<
532nm | Gearbest 303 Pointer | 50mW Metered
532nm | Gearbest JD-850 Pointer | 30mW Metered (I think, need to re-test).
633nm | HeNe | 6mW
633nm | Spectra Physics 155 HeNe | <1mW >>Thread<<
650nm | Sanwu Laser Pocket Series | 200mW Metered
808nm | Melles Griot 532nm Lab Unit | No Crystals >10W | X2



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Old 07-14-2016, 08:43 PM #11
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Default Re: Need help building laser pointer

Can someone give me a link to a host that would work with this module im not looking to spend more than $15
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Old 07-14-2016, 08:46 PM #12
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Default Re: Need help building laser pointer

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Originally Posted by diachi View Post
What does what mean? And your pictures aren't working.

Again - what way did you have the battery in?
So the positive side of the battery is facing toward the bottom of the shell where the button is the negative (flat side) is facing towards the module
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Old 07-14-2016, 08:49 PM #13
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Default Re: Need help building laser pointer

Quote:
Originally Posted by GSS View Post
If your using an 18650 battery that host must have a tail switch or other type. That link is showing a module with a momentary switch that you might need to bridge.

Oh yeah like Pi said 3.7 to 4.2V will likely be to much.
If your still set on this host Fastech has these modules in 5V form for around $6 rated at 5mw but are closer to 80mw. Just a thought.
The host does have a button
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Old 07-14-2016, 08:50 PM #14
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Default Re: Need help building laser pointer

Quote:
Originally Posted by Rickyspencer View Post
So the positive side of the battery is facing toward the bottom of the shell where the button is the negative (flat side) is facing towards the module

OK - that's the correct way around. So you have a button on the tail cap - which I'm assuming you want to use to turn the laser on/off.

What about the switch on the module? There's a little micro-switch on the driver (going by the pictures on the listing) that'd need to be closed for the module to turn on - unless it came shorted out from the factory so that you don't need to press it - I doubt that though.

Be careful, the 3.7-4.2V from your Lithium battery may fry the module. They don't usually have wide tolerances so you're best sticking with the specified 3V.
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405nm | Banggood LT-850 | "5mW" | Review Unit | Review WIP
445nm | Sanwu Laser Pocket Series | 400mW Metered
445nm | NDB7242E Pen Build | 60mW Metered | >>Build Thread<<
450nm | LaserPointerStore - Thor H2 | 1W(?) | Review Unit | >>Review<<
488nm | Spectra Physics 163 Argon | ~30mW Metered
515nm | PL515 Pen Build | 50mW Metered | >>Build Thread<<
520nm | Laserlands 520 | 5mW | Review Unit | 3mW metered | >>Review<<
532nm | Gearbest 303 Pointer | 50mW Metered
532nm | Gearbest JD-850 Pointer | 30mW Metered (I think, need to re-test).
633nm | HeNe | 6mW
633nm | Spectra Physics 155 HeNe | <1mW >>Thread<<
650nm | Sanwu Laser Pocket Series | 200mW Metered
808nm | Melles Griot 532nm Lab Unit | No Crystals >10W | X2



Check out my Reddit Subreddit! >>/r/laserpointers<<


Last edited by diachi; 07-14-2016 at 08:51 PM.
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Old 07-14-2016, 08:53 PM #15
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Default Re: Need help building laser pointer

Quote:
Originally Posted by Rickyspencer View Post
Can someone give me a link to a host that would work with this module im not looking to spend more than $15
It should fit one of these: Creative Technology Lasers - Pointer Host Component Page

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Old 07-14-2016, 09:10 PM #16
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Default Re: Need help building laser pointer

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So im probably just going to buy a new host but can i trust that website you listed and is their anything else i need other than the module, host and batteries?
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