Old 05-12-2014, 01:44 AM #1
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Default Homemade HANDHELD 14$ 250mw red laser

Hello, i recently built this RED 250mw for just 14$ with a module from ebay, i measured laser power with IR thermometer method and turned out it is ~231mw powah(im almost sure its coupled IR with red diode and real red is much less than that). The housing is a cheap-o flashlight with a 2 HDD motor rotors as a heatsink Runs on 3 alkaline batteries (FAIL) its consuming 222 ma and the voltage drops ALOT. must get lithium Link to laser ! http://www.ebay.com/itm/High-Power-2...-/231175789434 Post a comment of what You think of my homemade laser









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Old 05-12-2014, 02:30 AM #2
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Default Re: Homemade 14$ 250mw red laser

Let me be the first to say, Very nice!
+1 for being creative with out of the ordinary parts "2 HDD motor rotors"
I would love to own that laser!

Well done!
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Old 05-12-2014, 02:38 AM #3
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Default Re: Homemade 14$ 250mw red laser

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Originally Posted by i73770k View Post
Let me be the first to say, Very nice!
+1 for being creative with out of the ordinary parts "2 HDD motor rotors"
I would actually love to own that laser!

Well done!
Haha, thanks ! i didnt had anything round that is made from alumunium so decided to use 2 rotors, a lil bit of drill work and sandpaper and turned out to be pretty nice and slim
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Old 05-12-2014, 02:54 AM #4
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Default Re: Homemade 14$ 250mw red laser

I really like the home made, do it yourself type builds for next to nothing, well done.
This weekend just gone I did a few myself, extracted some great LOC diodes and couldn't believe my luck when got one of them to output just over 400mW when it was wired up outside the little hobby box.
Got it all in there and did a quick test before closing it up and killed the diode.
Was running at 550mA outside the box, so checked it again and it was showing 1.32A this time.

I still don't know how the hell it was showing 550mA, then over 1A without changing the battery source or moving the pot.

I guess I'm still a noob and will be for a while.

I'll get over it, maybe
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Old 05-12-2014, 02:59 AM #5
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Default Re: Homemade 14$ 250mw red laser

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Originally Posted by PaulorNuthn View Post
I really like the home made, do it yourself type builds for next to nothing, well done.
This weekend just gone I did a few myself, extracted some great LOC diodes and couldn't believe my luck when got one of them to output just over 400mW when it was wired up outside the little hobby box.
Got it all in there and did a quick test before closing it up and killed the diode.
Was running at 550mA outside the box, so checked it again and it was showing 1.32A this time.

I still don't know how the hell it was showing 550mA, then over 1A without changing the battery source or moving the pot.

I guess I'm still a noob and will be for a while.

I'll get over it, maybe
Yup, me too, thats IS actually best part, the process of making something yourself and in the end see it performing and looking good ! hahaha, yeah, i know that feeling, i fried 2 100mw laser modules by running them at very low voltage
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Old 05-12-2014, 05:10 AM #6
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Default Re: Homemade HANDHELD 14$ 250mw red laser

Shabos, was this your first build?
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Old 05-12-2014, 05:24 AM #7
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Default Re: Homemade HANDHELD 14$ 250mw red laser

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Shabos, was this your first build?
If you mean first handheld build then yes, this is my first. Been messin with lower power diodes with bench power supplies for a month.
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Old 05-12-2014, 10:50 AM #8
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Default Re: Homemade 14$ 250mw red laser

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Yup, me too, thats IS actually best part, the process of making something yourself and in the end see it performing and looking good ! hahaha, yeah, i know that feeling, i fried 2 100mw laser modules by running them at very low voltage
Just won 3 LG burners off eBay for 99c
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Old 05-12-2014, 11:01 AM #9
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Default Re: Homemade 14$ 250mw red laser

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Just won 3 LG burners off eBay for 99c
Awesome, You scored well there haha my next build i guess will be 2W 445nm blue beast
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Old 05-12-2014, 11:23 AM #10
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Default Re: Homemade 14$ 250mw red laser

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Awesome, You scored well there haha my next build i guess will be 2W 445nm blue beast
Well all the best of luck to you mate, they're a big jump from the little reds.
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Old 05-12-2014, 11:26 AM #11
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Default Re: Homemade 14$ 250mw red laser

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Well all the best of luck to you mate, they're a big jump from the little reds.
Yup, i have respect for them now, i was hit directly by 95 mw Mitsubishi red laser, had a foggy spot in left eye for a weeks, now its alot better tough, almost gone. A lil research and i came to conclusion it should fully dissapear after few months.
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Old 05-12-2014, 11:29 AM #12
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Default Re: Homemade 14$ 250mw red laser

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Yup, i have respect for them now, i was hit directly by 95 mw Mitsubishi red laser, had a foggy spot in left eye for a weeks, now its alot better tough, almost gone. A lil research and i came to conclusion it should fully dissapear after few months.
Instead of the conclusion being .......wear laser glasses?

Ok.
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Old 05-12-2014, 11:32 AM #13
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Default Re: Homemade 14$ 250mw red laser

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Instead of the conclusion being .......wear laser glasses?

Ok.
Glasses wasnt arrived yet in that time, couldnt resist turning it on !
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Old 05-12-2014, 11:43 AM #14
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Default Re: Homemade 14$ 250mw red laser

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Glasses wasnt arrived yet in that time, couldnt resist turning it on !
Those pole dancing classes paid off then
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Old 05-12-2014, 11:45 AM #15
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Default Re: Homemade 14$ 250mw red laser

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Those pole dancing classes paid off then
Hhahahaha, yeah
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Old 05-12-2014, 06:45 PM #16
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Default Re: Homemade HANDHELD 14$ 250mw red laser

Awesome job! Love that creativity. +rep

I don't think those multimode reds wil put out both red and ir at same time. I could be wrong, but I think they are either all red, or all ir, depending how they are wired and driven. So your output should be pure red.
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