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Thread: Cheap O-Scope

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    Default Cheap O-Scope

    So I was looking around at oscilloscopes, and it seems most decent ones are in the $100+ range... Out of reach for the moment. But I found this one on ebay:
    http://cgi.ebay.com/2-Channel-PC-Com...item2c53804128

    And I was wondering how that would be for testing a power supply for noise/ripple. It says it's accurate to +/-30mV... So is that a measure of accuracy or precision? Doesn't say. Would this do the job, or is this a tool to stay away from?
    It's my PSU in a box!
    Ooo-ooh,
    My PSU in a box, baby!

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    Default

    No good - sorry. Max sampling rate is too low.

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    Aw, oh well. What's the cheapest you'd recommend? If I can't get something for relatively cheap I could always see if my college's EE department is nice about loaning equipment...
    It's my PSU in a box!
    Ooo-ooh,
    My PSU in a box, baby!

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    Default

    The Cheapest would be the stingray, but I don't like the pictures taken from them (Jonnyguru, Hardwaresecrets).
    And a Rigol isn't really cheap.

    So if you want something that's OK, you should spent about 500USD on a scope.
    I recom to go to a store and test them in there, especially the software.

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    Yeah, that's what I was afraid of. Unless I really start a business or something there's no way I can afford one.

    Ah well. I'll see if I can cadge one off the EE students.
    It's my PSU in a box!
    Ooo-ooh,
    My PSU in a box, baby!

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    Default

    Makalu is using one of those USB only ones...

    Here's the thread with his testing:
    http://www.jonnyguru.com/forums/showthread.php?t=6496

    And here is where he got it:
    http://www.circuitspecialists.com/prod.itml/icOid/10214

    They have a 60Mhz version that's only 20 bucks more.
    i7-2600K W/Apogee XT block, ASRock Z77 Extreme 4, G.Skill 2x4GB 1600, Powercolor 5870 W/EK full block, Seasonic X650, Intel 320 160GB, Caselabs M8

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    Default

    yeah there may be something cheaper that will suffice but I'm pretty sure there aren't any that are cheaper and have better specs...I actually bought mine from a Hong Kong wholesaler which was cheapest at the time but circuitspecialists has added them since. Obviously you want the best one you can afford but I don't think it's necessary to spend $500 on one...I've only got about $750 in my complete testing set-up (assuming my time is worth nothing) and could be done cheaper.

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