britishtrident
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| posted on 11/2/11 at 03:59 PM |
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Cheap USB Oscilloecope very basic but works
I bought a very cheap USB dual channel Oscilloscope off ebay for £15 --- it only works DC 0 to +5v but can use standard x10 probes, the
scan rate is fast enough for automotive sensors. It is ideal for checking Lambda sensor output and TPS.
Main draw back is the software is pretty limited not anything like as good as Picoscope but it works, and I have found it much more useful than the
hand held scope I have. Ebay item 150556591171
They also do a 5 channel version that will measure AC voltages.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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britishtrident
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| posted on 11/2/11 at 04:10 PM |
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Oh forgot to say the USB lead that was supplied with mine was foobarred -- caused 10 minutes of cursing.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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blakep82
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| posted on 11/2/11 at 04:45 PM |
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is it fast enough for checking crank sensor signals?
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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v8kid
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| posted on 11/2/11 at 06:15 PM |
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Postage is a bit OTT but at £21 overall seems like excellent value - according to the spec it seems fast enough for crank sensors - what is the screen
like - is it a continuous line like a proper scope or is it bitty?
You'd be surprised how quickly the sales people at B&Q try and assist you after ignoring you for the past 15 minutes when you try and start a
chainsaw
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dinosaurjuice
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| posted on 11/2/11 at 07:59 PM |
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quote:
Originally posted by v8kid
Postage is a bit OTT but at £21 overall seems like excellent value - according to the spec it seems fast enough for crank sensors - what is the screen
like - is it a continuous line like a proper scope or is it bitty?
ive had a few bits and peices form 'virtual village' before and they always come reallly well packed, which for the sake of a few quid
saves the ebay arguments of 'who broke it' 
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MikeRJ
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| posted on 11/2/11 at 10:17 PM |
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5v maximum input looks a bit limiting.
In single channel mode an 8khz sample rate would be enough for most crank sensors at low engine speed, but e.g. a 36 tooth wheel at 6000 RPM has a
fundamental of 3.6kHz, too high to get a reasonable waveform at 8kHz.
[Edited on 11/2/11 by MikeRJ]
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britishtrident
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| posted on 11/2/11 at 10:35 PM |
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5V but it is standard 1 megohm so can use a x10 probe
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Madinventions
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| posted on 12/2/11 at 12:19 AM |
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With sampling rates like that, you're probably better off using a x10 probe and your PC/laptop sound card inputs with some free software. Even
the most basic sound card will give 44.1KHz sampling rate these days.
Alternatively, look at these
(cheaper on eBay).
Ed.
Mojo build diary: http://www.madinventions.co.uk
Solo music project: Syrrenfor http://www.reverbnation.com/syrrenfor
View my band website:
http://www.shadowlight.org.uk
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