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Old 2nd March 2010, 05:02 PM   #1
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Default USB Scope - Real scope and not too expensive

Very nice little two channels scope that plug on USB, great to use on a laptop.
It even includes the schematic, and how to right the code... At 249$ it is quite reasonable. Can be the solution for you guys working in your basement

See Parallax Home website:

PropScope
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Old 7th March 2010, 01:37 AM   #2
trd1587 is offline trd1587  Canada
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Does 10v seems low for 120 watts troubleshooting?

Marc
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Old 7th March 2010, 03:23 AM   #3
Enzo is offline Enzo  United States
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That might be iffy for mains, but for low power solid state stuff, it should work. A x10 probe on that 10v input max means you can measure 100v circuit points. And x100 probes are on the market for even larger range.
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Old 7th March 2010, 03:29 AM   #4
trd1587 is offline trd1587  Canada
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K thanks
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Old 7th March 2010, 04:09 AM   #5
star882 is offline star882  United States
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The sample rate is a bit low for the price.
Open source logic analyzer - Hack a Day
Add a high speed ADC and front end to it to make an oscilloscope.
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Old 9th March 2010, 07:38 PM   #6
tomchr is offline tomchr  United States
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PC scopes tend to be very limited. Especially their front ends are limited with 200 mV/div as the highest sensitivity. Measuring higher voltages is easily accommodated with an attenuating probe 10x, 100x, 1000x are commonly available. But there is no substitute for a good analog front end. For $250 you could get a pretty nice used Tektronix scope. That would be my choice any day. But hey... Maybe I'm just old fashioned...

~Tom
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Old 10th March 2010, 01:41 AM   #7
bill_a is offline bill_a  United States
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I dunno know, like tomchr says - I bought a Tektronix 2225 (2 channel, 50MHz) on eBay for $100. Granted you don't get waveform capture, but its a real 'scope. Just make sure you get a return policy, but there's a ton of used stuff out there for a lot less $.
Bill
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Old 10th March 2010, 07:17 PM   #8
tomchr is offline tomchr  United States
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Unless you absolutely need the raw data, a digital camera works fine for waveform capture on a real oscilloscope. It's been done that way for decades -- starting with Polaroid film back in the day... Love the old Tek scopes. My 2215 (2-ch, 60 MHz) and 2465B (4-ch, 500 MHz) are still ticking.

~Tom
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Old 13th March 2010, 02:19 AM   #9
bill_a is offline bill_a  United States
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Amen, bro!
Bill
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Old 13th March 2010, 02:56 AM   #10
parb is offline parb  United States
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what about the RIGOL DS1052E digital scopes? They are just a tad bit more expensive at $400 from hong kong and they seem to have rich functionality. I used old tek analog scopes when i went to school 20 years ago, but i don't know how keen i'm at buying one of those old bricks on ebay. The new scopes smaller footprint is very attractive to me, and i kind of like to have a new scope with warranty over something 15-20 year old which i don't know if i could fix myself if needed.
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