DX » Community » Reviews » 4.0mm 5mW Red Laser Module (3.5V~4.5V 3~5mA)
5.0
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  • What you would expect

    posted by Gunchars on 10/24/2009
    0

    Involvement:Expert (understands the inner workings) - Ownership:1 day to 1 week

    Pros:

    I've been playing around with these for the last couple of days. This is what I found:
    * The description (if you can call it that) (3.5V~4.5V 3~5mA) is not entirely correct, especially the part about current. I ran it from 3.3V regulated with 3mA and the beam was barely visible. At 35mA it's comparable to other 5mW pointers I have.
    * There's a 270 Ohm resistor on board, so you can wire it directly with a power supply. I used 3.3V, but I think that 3 x 1.5V cells would do just fine.

    Cons:

    * The previous review mentioned adjustable beam and a lens.. nothing like that here.
    * Also the beam has a visible halo around it. This is not really a problem with diode as a simple lens would fix that.

    OtherThoughts:

    Bottomline:

    The bottom line is that it pretty much works as expected. For this price you probably wouldn't find anything better.

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