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1251 Views 1 Reply Latest reply: Apr 18, 2013 10:54 AM by MetMan RSS
BlindedByTheLight Novice
BlindedByTheLight
Currently Being Moderated

Apr 16, 2013 9:50 AM

Looking for a reliable, super-cheap multimeter

Anyone have suggestions for a reliable but super-cheap multimeter? I’m building a 500mW burning laser using a diode that has a working current < 340mA with a driver that can output up to 500mA. Directions say to turn the pot clockwise to increase output current, but when I did that I noticed that there’s no real end to how far I can turn it. It just keeps spinning and spinning. I don’t want to overturn the thing and burn the diode out, so I figure a multimeter will help me determine how far to turn the thing, and then I can mark it up so I know for future reference.

 

I just don’t want to pay a ton for a tool I’m using for a side project.

Tags: technology, laser, multimeter, need-a-multimeter, laser-diode, optoelectronics, diy-projects, hobbyist-projects
  • MetMan Apprentice
    MetMan
    86 posts since
    Oct 24, 2011
    Currently Being Moderated
    Apr 18, 2013 10:54 AM (in response to BlindedByTheLight)
    Looking for a reliable, super-cheap multimeter

    I've had a variety of meters and have never had a problem with the nice ones or the cheapos.  If you're using it for quick measurements where you don't need super accuracy or precision, then nearly any inexpensive meter should work for you.  If you want a real accurate meter, get a Fluke.  Otherwise, just go to Harbor Freight or Radio Shack and pick up a little digital meter for $15.

     

    Surprisingly I can't find a very inexpensive meter on Digikey...   Newark has this Tenma for $15.

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