Chinese 5mW red line laser – driver/heatsink?

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This topic contains 2 replies, has 2 voices, and was last updated by Profile photo of Leo69 Leo69 9 months ago.

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  • #13899
    Profile photo of Mike Cunningham
    Mike Cunningham
    Participant

    I bought 2 of these, to use as a crosshair, primarily for my 2.8w laser; but they won’t be here for ~2 months…

    http://www.ebay.com/itm/281725342189

    Do these have a built-in driver/current limiter; or do I need to get those aswell? I am assuming that because they cost ~20 times what a regular 5mW diode costs, they would have a driver in them; but I am seeing a lot of different opinions on different pages… some people use external drivers, some don’t…

    Also, a 5mW laser should not produce enough heat to warrant a heatsink, would it?

    V/r,
    Mike

    #14099
    Profile photo of Leo69
    Leo69
    Participant

    I see the 5v source voltage is listed but What’s the input current? I’m guessing approximately 40-50ma. If so, no driver should be needed.you can connect directly to an unused digital pin on Ramps board and switch/power the diode through a marlin m42 command.

    #14100
    Profile photo of Leo69
    Leo69
    Participant

    5mw is standard issue dollar store laser pointer.no heat sinking should be required. The module housing is plenty.

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