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Bill.b

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Joined: 25/06/2011
Location: Australia
Posts: 225

Posted: 05:22am 15 Feb 2012

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Hi all

This may be of interest to any one requireing a cheep oscilloscope/datalogger/Logic analyzer suitable for fault finding logic circuits.

It was developed by Wolfgane Maichen, the Kit costs approx AU$73.00 including
postage.

The unit is powered from then USB port and solftware is free.

more information ca be found at http://www.dpscope.com

In the interests of the environment, this post has been constructed entirely from recycled electrons.

Olimex
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Joined: 02/10/2011
Location: Bulgaria
Posts: 226

Posted: 06:58am 15 Feb 2012

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PIC32 ADC sampling is 1Msps i.e. you can implement something better than this one with just Maximite/DuinoMite!

djuqa

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Joined: 23/11/2011
Location: Australia
Posts: 447

Posted: 07:06am 15 Feb 2012

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Olimex said PIC32 ADC sampling is 1Msps i.e. you can implement something better than this one with just Maximite/DuinoMite!

Sounds like a good idea for a Project

VK4MU MicroController Units

Ray B
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Joined: 16/02/2007
Location: Australia
Posts: 219

Posted: 08:35am 15 Feb 2012

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The full history of this project is on the PicAxe Forum
http://www.picaxeforum.co.uk/showthread.php?20378-Simple-osc illoscope-for-Picaxe-work-finally-finished!-%28DPScope-SE%29

Cheers

RayB from Perth WA

Gizmo

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Joined: 05/06/2004
Location: Australia
Posts: 5016

Posted: 08:55am 15 Feb 2012

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djuqa said

Olimex said PIC32 ADC sampling is 1Msps i.e. you can implement something better than this one with just Maximite/DuinoMite!

Sounds like a good idea for a Project

True, it would make a good project for a 'mite. Plus it would eliminate the need for a PC, we could use the 'mites own VGA and keyboard interface.

But I think it would need a bit of fast C to do the sampling, MMBasic would only be quick enough for a few hundred Hz bandwidth.

Or is there a fast sampling chip we could use to sample, store and send via serial?

Glenn

The best time to plant a tree was twenty years ago, the second best time is right now.
JAQ

pickle9000
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Joined: 30/03/2012
Location: Canada
Posts: 6

Posted: 03:01am 30 Mar 2012

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Being able to grab a sample would be great.

Playing it back would also be a great way to make waveforms. Play a single word or some cool sound effects. The pic32's are made for it. I guess the real issue would be that the sample would eat up memory fast. Even so it would be worth it.

As for a chip to do the work, there is always a better chip but the cost of making it work is always a hard barrier to beat. A 1meg sample rate (if that is what it can do) will be more than enough for decent audio range sampling. I expect that Microchip even has a sample capture routine to get a person started. I wish I had the time to play more.

Man I really like this idea I hope it does not die.

...mike

plover

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Joined: 18/04/2013
Location: Australia
Posts: 302

Posted: 09:58pm 10 Jan 2016

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Well it looks like the project died or has another attempt been posted?

I am currently looking/searching forum for anything "datalogger" Edited by plover 2016-01-12

Ray B
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Joined: 16/02/2007
Location: Australia
Posts: 219

Posted: 10:40pm 10 Jan 2016

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Welcome to 2016.... Data Loggers have advanced & only cost a couple of $$$ using Arduino. Follow this YouTube link
https://www.youtube.com/watch?v=XAxv0fr26_8

RayB from Perth WA

JohnS
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Joined: 18/11/2011
Location: United Kingdom
Posts: 3659

Posted: 11:01pm 10 Jan 2016

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A 'mite (with CFunction as needed) can surely do better, if anyone wants/needs to.

(If you need faster/better still, there's a Raspberry Pi one.)

As the CPU used in the Arduino one has so little RAM, as well as being rather slow, I wonder how limited it is? ("Very" is my feeling.)

JohnEdited by JohnS 2016-01-12

matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 8585

Posted: 11:09pm 10 Jan 2016

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Quote A 'mite (with CFunction as needed) can surely do better, if anyone wants/needs to.

I've already written the cfunctions for both an Oscilloscope and logic analyser but they need someone to write a user interface to make them properly usableEdited by matherp 2016-01-12

Chris Roper
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Joined: 19/05/2015
Location: South Africa
Posts: 280

Posted: 12:01am 11 Jan 2016

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matherp said ... but they need someone to write a user interface to make them properly usable

Have you seen the SUMP Logic Analyzer Client it is a java app so should run on any PC, and the protocol is well documented and it can display the Logic Analyzer output as well as do protocol analysis and Scope Display.

There is a third party one too, that uses the same protocol, I will try and find it.

Cheers
Chris

EDIT:

Here it is http://ols.lxtreme.nl/

With sump as the display and Micromite as the active component all we need is a decent front end.
Edited by Chris Roper 2016-01-12

http://caroper.blogspot.com/

Ray B
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Joined: 16/02/2007
Location: Australia
Posts: 219

Posted: 12:07am 11 Jan 2016

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JohnS said A 'mite (with CFunction as needed) can surely do better, if anyone wants/needs to.

(If you need faster/better still, there's a Raspberry Pi one.)

As the CPU used in the Arduino one has so little RAM, as well as being rather slow, I wonder how limited it is? ("Very" is my feeling.)

John

The original request by plover was for "anything datalogger" so it's to that I'm responding although some people may think this forum is just for Mites.

Following is some data I've just saved every second to SD card suitable for importing into Excel, being 3 Analog inputs & 3 Dallas Temp Sensors. This is all running on a $4 NANO with a SC Card & RTC modules. All up less than $10.

For those interested the Arduino IDE now has a charting capability built-in.

1,2016/01/11,17:55:09,A0:=,807,A1:=,600,A2:=,560, T1:= 28.19,T2:= 28.06,T3:= 28.19,
2,2016/01/11,17:55:11,A0:=,807,A1:=,665,A2:=,613, T1:= 28.19,T2:= 28.06,T3:= 28.19,
3,2016/01/11,17:55:12,A0:=,807,A1:=,679,A2:=,627, T1:= 28.19,T2:= 28.06,T3:= 28.19,
4,2016/01/11,17:55:13,A0:=,807,A1:=,688,A2:=,641, T1:= 28.19,T2:= 28.06,T3:= 28.19,
5,2016/01/11,17:55:15,A0:=,807,A1:=,703,A2:=,655, T1:= 28.19,T2:= 28.06,T3:= 28.19,
6,2016/01/11,17:55:16,A0:=,808,A1:=,705,A2:=,663, T1:= 28.19,T2:= 28.06,T3:= 28.19,
7,2016/01/11,17:55:17,A0:=,807,A1:=,700,A2:=,659, T1:= 28.19,T2:= 28.06,T3:= 28.19,
8,2016/01/11,17:55:19,A0:=,807,A1:=,697,A2:=,656, T1:= 28.19,T2:= 28.06,T3:= 28.19,
9,2016/01/11,17:55:20,A0:=,808,A1:=,709,A2:=,668, T1:= 28.19,T2:= 28.06,T3:=

Cheers all

RayB from Perth WA

geraldfryjr

Regular Member

Joined: 02/03/2014
Location: United States
Posts: 61

Posted: 01:21am 11 Jan 2016

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I am always looking for projects like this.
I have a nice little scope program that I found a while back that runs on my STM32F429i-Disco board.

It works very well and is open source and I think can be found on git hub.

I was able to compile it using CooCox and cerate the Hex file and I think that it is also already provided in the download files.

First Oscope

Here is a Gogole search where you can find it and probably a few more examples.

Oscope

Cheers!!

jer

Edited by geraldfryjr 2016-01-12

Keep on DIYin' !!!

Ray B
Senior Member

Joined: 16/02/2007
Location: Australia
Posts: 219

Posted: 01:38am 11 Jan 2016

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And for an introduction to using Logic Analyser you can't go past attached.
http://www.ebay.com/itm/USBEE-AX-PRO-Logic-Analyzer-Learning-board-programmer-w-DuPont-Lines-for-SCM-/261732056134?hash= item3cf0723c46:g:97QAAOSwzrxUs5iK

Or for a basic CRO
http://www.banggood.com/DIY-Digital-Oscilloscope-Kit-DSO062-DIY-Kit-p-981554.html

Cheers

RayB from Perth WA

JohnS
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Joined: 18/11/2011
Location: United Kingdom
Posts: 3659

Posted: 02:16am 11 Jan 2016

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SUMP's the one I posted about previously.

A $5 RPi is an idea for it once the zero is available easily :)

Wish there was a $5 (or $4) 'mite. Nearest rough equivalent I have was about $10 (ready-built board with PIC32 MX170).

JohnEdited by JohnS 2016-01-12

kiiid

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Joined: 11/05/2013
Location: United Kingdom
Posts: 671

Posted: 02:40am 11 Jan 2016

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JohnS said Wish there was a $5 (or $4) 'mite. Nearest rough equivalent I have was about $10 (ready-built board with PIC32 MX170).

John

Well, now there is a $0 one

I am willing to give away a certain number of pre-allocated Microkite modules until the quantity is exhausted. You pay for the postage only, that's about a pound.

Edited by kiiid 2016-01-12

http://rittle.org

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JohnS
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Joined: 18/11/2011
Location: United Kingdom
Posts: 3659

Posted: 03:12am 11 Jan 2016

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That's a good price! Any better ones anyone? (*)

umm, the module concerned doesn't look like something that obvious or easy to use. At a quick look I couldn't tell what CPU is fitted, how I connect to it (or even read the full info at first as the web page doesn't fold the text to the browser window size).

I gather it needs a carrier board with a socket, or some such?

John

(*) not expecting any!

kiiid

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Joined: 11/05/2013
Location: United Kingdom
Posts: 671

Posted: 04:18am 11 Jan 2016

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(*) Don't count on it

Someone might come with a negative number offer...

Yes, the module will need a holder because in essence it imitates an IC, just integrated with some extra stuff on it. The MCU is MX170.

http://rittle.org

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JohnS
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Joined: 18/11/2011
Location: United Kingdom
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Posted: 05:02am 11 Jan 2016

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Yes, you never know!

How much is the carrier? (To compare prices, the board I mentioned is a fully-populated one, with chip, etc.)

John

kiiid

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Joined: 11/05/2013
Location: United Kingdom
Posts: 671

Posted: 05:09am 11 Jan 2016

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Well, the problem is that I am running out of carriers right now.
Generally it is �1.35; DEB2-1001W68 is the board.

http://rittle.org

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