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plameniv
Joined: 15 Jul 2006
Posts: 4
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miniK0bo
Joined: 16 Jul 2005
Posts: 7
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 04 Dec 2007 14:44 Digital oscilloscope Project |
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you can check this one out, this is developed with the help of the people of this forum
http://www.soudez.be/joomla/index.php
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renes
Joined: 07 Dec 2007
Posts: 2
Location: Parker, CO, USA
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| 11 Dec 2007 5:25 Re: Digital oscilloscope Project |
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What is the status of version 2 of this project at www.soudez.be/joomla/index.php?
Anything I can help?
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plameniv
Joined: 15 Jul 2006
Posts: 4
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| 13 Dec 2007 10:39 Re: Digital oscilloscope Project |
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| renes wrote: |
What is the status of version 2 of this project at www.soudez.be/joomla/index.php?
Anything I can help? |
Yes, this is interesting circuit diagram.
I saw carefully this DSO but sampler realized inside in ADC but I want to build external sampling schematic.
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khach
Joined: 23 Oct 2001
Posts: 48
Helped: 2
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| 14 Dec 2007 10:48 Re: Digital oscilloscope Project |
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| plameniv wrote: |
Is it anyone have a sampler analog circuit about DSO oscilloscope ?
I would like to build DSO oscilloscope like this :
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Boards of DSO-2150 and DSO 220 scopes
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plameniv
Joined: 15 Jul 2006
Posts: 4
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| 14 Dec 2007 11:09 Re: Digital oscilloscope Project |
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| khach wrote: |
Boards of DSO-2150 and DSO 220 scopes |
Do you have quality photo for DSO 220 but with open in analogue part ?
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kobe_fan
Joined: 24 Dec 2007
Posts: 1
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| 24 Dec 2007 11:07 Re: Digital oscilloscope Project |
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hello everyone,
i have a project but i have no idea about its VHDL code. I did its hardware part but i couldn't do anything about its software is there anyone who can explain me the code or give an example?? thank you.
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renes
Joined: 07 Dec 2007
Posts: 2
Location: Parker, CO, USA
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| 28 Dec 2007 2:08 Re: Digital oscilloscope Project |
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Hello kobe_fan
you might want to looked at: http://www.fpga4fun.com/digitalscope.html
Regards,
Rene
PS: I've been tying to find out about the second version of this project but nobody in this forum has responded. This forum seems to be taking a break.
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ahmed osama
Joined: 18 Jul 2004
Posts: 255
Helped: 1
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| 30 Dec 2007 21:07 how to participate? |
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how to participate?
i tried more than one time to open your sites but no way..
and what about registertion ??
I need to share you such very interesting project...
may be a small tip from me can help
thanks all
bye
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Michael_B
Joined: 21 Nov 2005
Posts: 9
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| 26 Jan 2008 16:47 Re: Digital oscilloscope Project |
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Good PC oscilloscope GUI:
www.oscilloscope-lib.com
Regards
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Giuss
Joined: 16 Oct 2006
Posts: 37
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| 26 Jan 2008 22:31 Re: Digital oscilloscope Project |
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| plameniv wrote: |
| miniK0bo wrote: |
as promised: the schematics
so far there is one mistake in the schematics. the reserved pin on the fx2 chip needs to be grounded! |
Is it anyone have a sampler analog circuit about DSO oscilloscope ?
I would like to build DSO oscilloscope like this :
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I've bought a DSO 2150 recently and it works fine
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Make_Pic
Joined: 13 Apr 2002
Posts: 79
Helped: 1
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| 03 Feb 2008 20:32 Re: Digital oscilloscope Project |
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| Giuss wrote: |
| plameniv wrote: |
| miniK0bo wrote: |
as promised: the schematics
so far there is one mistake in the schematics. the reserved pin on the fx2 chip needs to be grounded! |
Is it anyone have a sampler analog circuit about DSO oscilloscope ?
I would like to build DSO oscilloscope like this :
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I've bought a DSO 2150 recently and it works fine |
OK!
But -> We need the schematic for DSO2150. Do you have this sch?
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Giuss
Joined: 16 Oct 2006
Posts: 37
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| 04 Feb 2008 22:03 Re: Digital oscilloscope Project |
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| Make_Pic wrote: |
| Giuss wrote: |
| plameniv wrote: |
| miniK0bo wrote: |
as promised: the schematics
so far there is one mistake in the schematics. the reserved pin on the fx2 chip needs to be grounded! |
Is it anyone have a sampler analog circuit about DSO oscilloscope ?
I would like to build DSO oscilloscope like this :
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I've bought a DSO 2150 recently and it works fine |
OK!
But -> We need the schematic for DSO2150. Do you have this sch? |
I don't have the schematic and it isn't supplied with the DSO, sorry
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alphi
Joined: 23 Dec 2001
Posts: 439
Helped: 1
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| 07 Feb 2008 2:38 Re: Digital oscilloscope Project |
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| random repetitive sample can reach high sample rate(ex.5GHZ) use low sample adc(ex.100MHZ),but how to realize random repetitive sample?
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womai
Joined: 12 Mar 2008
Posts: 4
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| 16 Apr 2008 8:04 Re: Digital oscilloscope Project |
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Maybe of interest to the people on this thread, I am currently working on a simple, very low cost hobby scope. The design (schematic) and the controller software will be freely available. Preliminary base specs are 1 MSample/sec per channel, analog bandwidth >200 kHz, 8 bit resolution, voltage range 2V/div down to 0.1V/div, 2 channels, trigger on rising or falling edge or autotrigger, screen refresh rate approx. 3 - 10 frames/sec, uses PC for control and display (connects through serial port or USB-to-serial converter). Does not do any fancy sinx/x interpolation, so based on the sample rate it will be usable up to approx. 150 kHz analog bandwidth - good enough for manny hobby applications, audio work.
Total cost should be below US$50 when you get some of the parts as free samples from the respective chip manufacturer. Uses only DIP packaged chips and through-hole parts, so easy to assemble by a hobbyist.
I have about 75% of the circuit built up on a breadboard, working great so far.
Some more details here:
http://www.picaxeforum.co.uk/showthread.php?t=9239
Picture of my breadboarded circuit in an earlier stage (missing the input amplifier with gain & offset control, as well as the trigger pickoff):
http://pdamusician.com/electronics/lcs_1m_02_lowres.jpg
http://pdamusician.com/electronics/LCS_1M_01_lowres_annotated.JPG
Screenshot of the PC controller software (hacked together from a different project of mine), showing operation at full speed (10us/div, 1MSample/sec):
http://pdamusician.com/electronics/lcs_1m_screenshot.jpg
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king_cobraz_77
Joined: 06 Mar 2006
Posts: 18
Helped: 1
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| 27 Apr 2008 14:15 Re: Digital oscilloscope Project |
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| Please provide some schematice and code also
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womai
Joined: 12 Mar 2008
Posts: 4
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| 27 Apr 2008 17:44 Re: Digital oscilloscope Project |
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That's the plan once I finished circuit development and made the printed circuit board version; everything you need to build your own copy will be available. In the meantime I have completed the one-channel breadboard version, which works great and meets or exceeds all the target specs. For the two-channel version all that's missing is a second ADC and a second SRAM. I'll have to update my schematic because I made quite a few changes while tinkering with the breadboard circuit.
A picture is here:
http://pdamusician.com/electronics/IMG_6217.jpg
You could probably already reverse-engineer the schematic from that 
As you can see, couldn't get any easier to build - a number of DIP's and a few garden-variety discrete components. The only thing I couldn't achieve so far is 1 MOhm input impedance, that would need better compensation of the frontend opamp's input capacitance; I ended up with only 60 kHz analog bandwidth when I tried with a straightforward resistive divider, while my current version has >500 kHz (with an input impedance of 133 kOhm). So you'd need to use any probes in 1x mode, not 10x. Not a big deal given the relatively low sample rate.
For those interested, the ADC is a Maxim MAX153, for up to 1 MSample/sec, but it works also with an ADC0820 (I tested it up to 0.5 MSamples/sec, a bit above it's spec maximum of 0.4 MSample/sec). The sample control are 5 standard 74HCxx series logic chips (hope to reduce it to 4) - dirt cheap. The microcontroller is a Picaxe 28X1 (www.picaxe.co.uk), basically a Microchip PIC with bootloader and Basic interpreter. Not a lot of horsepower but super-easy to program, and the download (programming) cable doubles as the PC link for the scope, again reducing cost and complexity. Could of course be replaced by the underlying Microchip PIC if you rewrite the firmware. Samples are stored on a 2Kx8 SRAM (only 256 bytes used). ADC and I/O-Expander are free samples from Maxim. All the other analog and mixed-signal chips (DACs, op-amps, adjustable gain amplifiers) are free samples from Microchip.
I'll keep you posted about any further progress.
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sohail_akram
Joined: 26 Feb 2006
Posts: 50
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| 28 Apr 2008 7:02 Re: Digital oscilloscope Project |
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go to Avr freaks website
their are such project
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womai
Joined: 12 Mar 2008
Posts: 4
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| 28 Apr 2008 7:54 Re: Digital oscilloscope Project |
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The fastest AVR project I am aware of maxes out at 200 kSamples/sec, I'm not sure anymore of it was on one or two channels (believe it was one). The fastest Microchip (dsPic) based one is around 700 kSamples/sec but only a single channel - which severely limits its application. afaik the AVR's internal ADC have only around 50 kHz bandwidth anyway. None of them has an adjustable gain frontend, which limits the range of signal levels they can display. That's one of the disappointments I had when researching the best solution - there are many half-baked designs out there, proof-of-concept, but very few go all the way and make it a usable product.
Are there any new projects (especially with published description, schematics etc.) that I missed? Always interested to hear of alternative approaches.
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AlSa
Joined: 23 Jun 2008
Posts: 5
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| 23 Jun 2008 21:41 Re: Digital oscilloscope Project |
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Example digital scope at this site:
http://averos.f-sw.com/ (AveScope)
Scheme and programm.
Last edited by AlSa on 04 Jul 2008 14:38; edited 1 time in total |
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AlSa
Joined: 23 Jun 2008
Posts: 5
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CMOS
Joined: 06 Jan 2004
Posts: 672
Helped: 26
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| 07 Jul 2008 20:22 Re: Digital oscilloscope Project |
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Do you have English translation of your site?
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AlSa
Joined: 23 Jun 2008
Posts: 5
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| 11 Jul 2008 13:09 Digital oscilloscope Project |
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| Maybe later. It this moment we translate our Program AveScope for English.
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AlSa
Joined: 23 Jun 2008
Posts: 5
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ray0812
Joined: 08 Aug 2008
Posts: 1
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| 08 Aug 2008 18:37 Re: Digital oscilloscope Project |
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An AVR scope built by Chinese. Only 2MS/S but very simple and cheap. Good for hobbists who don't need high frequency.
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miniK0bo
Joined: 16 Jul 2005
Posts: 7
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| 23 Aug 2008 16:50 Re: Digital oscilloscope Project |
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| ray0812 wrote: |
An AVR scope built by Chinese. Only 2MS/S but very simple and cheap. Good for hobbists who don't need high frequency.
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Look very nice, and very cheap indeed. Around €20 for this one, and €25 for the one with more button. I wonder if they also have English documents for their product...
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Giuss
Joined: 16 Oct 2006
Posts: 37
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| 28 Aug 2008 21:25 Re: Digital oscilloscope Project |
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| ray0812 wrote: |
An AVR scope built by Chinese. Only 2MS/S but very simple and cheap. Good for hobbists who don't need high frequency.
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Do you have more info about it?
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Make_Pic
Joined: 13 Apr 2002
Posts: 79
Helped: 1
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| 30 Aug 2008 8:11 Re: Digital oscilloscope Project |
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| Giuss wrote: |
| ray0812 wrote: |
An AVR scope built by Chinese. Only 2MS/S but very simple and cheap. Good for hobbists who don't need high frequency.
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Do you have more info about it? |
Try this: single-board-LCD digital storage oscilloscope
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AlSa
Joined: 23 Jun 2008
Posts: 5
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womai
Joined: 12 Mar 2008
Posts: 4
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| 06 Sep 2008 6:34 Re: Digital oscilloscope Project |
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My oscilloscope design is finally finished - hardware as well as software! I put a website together where you can get all the information to build your own:
http://www.pdamusician.com/lcscope/
Feedback is always very welcome.
Good luck!
Wolfgang
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