The First Laser Built - 694.3 nm Ruby Laser

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    Building a portable power supply.

    Complete Newb here, but I’m a medical researcher looking at using a laser to scan for fractures. Problem is I have no idea how to wire a battery to a module so the unit is portable. It needs to be portable so it can be used by paramedics, rural and remote areas etc...
    Is there a simple course to learn or is it a series of basic parameters to achieve or is there a secret cult of Electronics where I have to swear my allegiance ?
    Any assistance would be most appreciated. Thank you.

    #2
    I can’t answer regaring the feasibilty of your idea but as far as the diode wiring etc., you just need a battery supply with enough voltage and current capacity wired to a constant current regulator set to the maximum allowed current for the laser diode, provided you have enough heat sink so the diode does not get too hot.

    There is a google store you can go to to buy diodes, drivers (constant current regulators) and possibly a heat sink which will work for you as well as prewired modules with collimation les which just need a host to hold the batteries and heat sink built into it. Google: DTR LPF.

    As far as your comment about using lasers to scan bones, best to go to www.laserpointerforums.com - it’s the go to place for such questions. lots of posts like this there quite frequently, and a very active forum.

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      #3
      Thanks for the information Admin, most appreciated. I’ll do some study and get back to you, if I may, with another question.
      On on hand, it would be great to learn all about electronics and learn to build these projects myself but if I can buy an appropriate setup for the diode , or find someone who would put the components together that would speed up my research. Thank you.
      I’m in Sydney.

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        #4
        I took a shortcut and bought a laser online ,it says it’s 500mW and 12 V but that’s all the information I can find.
        If I connect it up to a 12V power supply , how do I work out the Amps ? Is there a formula or is it a variable or critical value ? I did Google for an answer.
        Thank you.

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          #5
          Please post a link to the web site you bought it from, that would be easier to see what you have. Have you reached out to them and asked? No information given on the web site you bought it from? Assuming that's where you found it?

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            #6
            Here’s a pic of the first 808nm but I don’t know what Input to the wires at the top right .
            so how do I determine what adapter to use ?

            And a second laser that I m guessing is plug and play.
            https://www.aliexpress.com/snapshot/...42534792509685

            Sorry English isnt my first language.
            Thank you.

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              #7
              The aliexpress link doesn't work for me. That laser in the photo has a driver board, you should be able to just hook it to DC power, cutting off that connector and wiring to a DC or battery supply somehow but verify the red means positive, the black negative. I've received lasers from China with the colors backwards to what I expected in the past. Probably red is positive, black negative, but take nothing for granted.

              I'm going to be on a trip soon, unable to answer here. Best to ask this question on laserpointerforums.com, lots of activity there, this forum is dead.

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                #8
                Is this a suitable DC supply or can you recommend something more laser specific up to $500 please ?

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                  #9
                  Lots of laser hobbyists use that quality of power supply, just don't leave anything connected while powering up, or turning off as they can produce high voltage spikes and destroy your device. OK, I'm on my trip, cheers! Won't be able to respond to further posts.

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