monspace_ The cheapest dual trace scope in the galaxy.pdf

blog de Yves Lebrac aka jL.

'

monspace: The cheapest dual trace scope in the galaxy http://yveslebrac.blogspot.ro/2008/10/cheapest-dual-trace-scope-in-galaxy...

1 of 15 15.07.2013 09:35

It does connect to a PC with usb in HID mode, without the need to install any specific driver.

Data are diplayed on the PC with .NET C# software. This is an exemple of my display

programOf course you can write your own code to capture or display the datas

Here is the schematic, so simple !

Thank you to[Milka2009] who made a nice video


2 of 15 15.07.2013 09:35

Publié par Yves Lebrac aka Jacques Lepot a 01:44

Libellés : scope usb avr tiny atmel hid diy

Bill of material

1 Led (any)

1 R for led, from 220 to 470 ohm, smaller is brighter

2 R 68 ohm on USB D+ & D-lines

1 Pull up R 1.5K for USB device detection

2 Zener 3.6V for right USB signal levels

2 Bypass caps 100nf & 47uf

2 filter caps on analog inputs ( from 10nf to 470nf or nothing, up to you)

1 or 2 trimpots on analog inputs to scale your voltage to AD range (1.2V or 2.5V by

software )

1 USB socket (A,B, mini, you chose)

1 Atmel Tiny45-20.

eagle files: usbscope-tiny.zip

Here is the C source for the firmware including usb lib and HID descriptors

firmwarev3.zip,

and for those who do not want to mess with compilers, the .HEX file ready to flash

main.hex.

Do not forget to set the fuses for internal PLL clock

And last for today, the Windows display software UsbADC.zip. There is no setup with it, so

copy in a folder with the dll and try. It is .NET so you need the framework.

UPDATE: for all who requested the C# code for this app, here is the link usb-scope.zip

done with Visual Studio 2005

UPDATE: broken links to source files have been fixed.

Thanks for reading.

+5 Recommander ce contenu sur Google

61 commentaires:

RigoR MorteM 3 octobre 2008 02:03

really good idea!

Tnx to share your project (and congrats to be on the hack a day blog!)


3 of 15 15.07.2013 09:35

Répondre

Anonyme 3 octobre 2008 10:18

I saw your project on Hackaday. Awesome!

How many samples per second are you able to get out of the ATTiny ADC?

Répondre


Bonne idée!

Les sources du programme .NET C# sont elles disponibles aussi? Ou tout du moins

un exemple de récupération des données du gamepad en C#.

Merci et bonne continuation.

Répondre

Yves Lebrac aka Jacques L. 3 octobre 2008 17:38

Do not expect more than 100's of sample/S, the bottleneck is in the HID interface.

I will post the C# code soon on codeproject.com, come back to check for the link.

Répondre


Here is one ZIP containing all of the files: http://rapidshare.com/files/150844756

/usb-scope.zip.html

Répondre

magician13134 4 octobre 2008 20:29

I can't get this working, despite following the instructions... The problem seems to

be with the data lines, if the device is connected to 5V, the LED stays on, but if it is

connected to 5V and the data lines, the LED turns on for half a second or so, then

goes off. My computer sees nothing... I replaced the pot with a 47ohm resistor, is

that bad? That;s the only difference....

Répondre

Japala 4 octobre 2008 23:22

Dare I ask for sources for Windows program? I would like to adapt it to Delphi...

Répondre


magician,

The led should stay on. The pot act as a divider so you have to replace it by 2

resistors. it depends on how you put your res, but 47 is low and it can draw to

much current, try without it.

If you did not make a pcb, try to have very shorts wire between the USB conn. and

the cpu there is 12Mhz around there. Also do not exchange D+ and D-!

Do not use the divide by 8 fuse for the clock, only PLL internal.

The device should be in your control panel in game ctrls. and identified as

Easylogger.

Répondre


4 of 15 15.07.2013 09:35


I made the PCB exactly from your files, would having the 47ohm resistor there

cause it to not even be recognized? And can you tell me exactly what to type into

AVRDude for the fuses? I copied it from the Makefile, but I don't know if that's

right...

Répondre


Here are a few more things, I'm using the '1N4729A' diode, 3.6V. Here are some

pictures:

http://img377.imageshack.us/my.php?image=1008523bw1.jpg

http://img129.imageshack.us/my.php?image=1008524xc1.jpg

http://img377.imageshack.us/my.php?image=1008525ih4.jpg

http://img377.imageshack.us/my.php?image=1008528ga7.jpg

There are NO shorts. I've checked everything with a continuity tester...

Répondre


magician, i did look your picture,as you made a pcb and you say there are no

shorts (check near the big cap and the under the usb socket).The problem is not in

hardware.i cannot help with avrdude i use avrstudio.

Double check your CPU, check the flashing, the usb cable, are you with XP ? i did

not test for vista.

Except the first time, ther is no message in windows when you connect and it never

request a driver.Try different ports.

>> if you put NO CPU on the board,

and you connect, windows should detect something then say "not recognized" if not

so there is a problem with the cable or pc usb.

give your email.

Répondre

Ben 7 octobre 2008 13:26

Thanks alot for your help, I replaced the 3.6V diodes with 3.3V and got it working!!

Have you uploaded the C# code yet? I'd like to take a look at that...

Répondre


i'd buy one

Répondre

Argi 8 mars 2009 12:39

Bravo, very interesting!

Répondre

Dreschel 29 avril 2009 18:03

A great idea and implementation. THANK YOU VERY MUCH! I bread-boarded mine

last night and got it working this morning. Some info for other building one that may

be useful:


5 of 15 15.07.2013 09:35

1. I did not have the 3.6V zeners avaialble. I just put two regular diodes in series on

the 5V line to drop the supply voltage to the ATTINY45 to 4V. This seems to work

OK.

2. I did not have the USB receptacle either, so just used an old USB cable with one

end clipped off. The +5V line was red, the ground line was black (remember to

connect shield to black), the D- line was white, the D+ line was green.

3. The fuse settings for the ATTINY45 were as follows (for AVR STUDIO):

BODLEVEL 2.7V

EESAVE not preserved

WDTON disabled

SPIEN enabled

DWEN enabled

RSTDISBL enabled

-> which equals 0xdd

CKSEL hf pll (0001)

SUT 1..0 bod enabled fast rise

CKOUT disabled

CKDIV8 disabled

-> which equals 0xe1

(this was taken from the EasyLogger data files)

Hope this helps. I am hoping the C source for the PC program will be available

soon.

Répondre

Papalevies 24 mai 2009 00:31

Very cool project.

Just my 2cents:

In order to download the program to the avr AND set the fuses appropriately using

avrdude use this:

avrdude.exe -p t45 -c YourProgrammer (mine is the serial programmer

ponyser) -P YourPort (for serial programmers it's usually com1 in Windows

and /dev/ttyS0 in Linux) -e -U flash:w:main.hex -U lfuse:w:0xf1:m -U

hfuse:w:0xdf:m -U efuse:w:0xff:m

Répondre

Anonyme 6 juin 2009 23:21

Very good work Jacques!

I have been trying to get .NET to talk to my AVR-USB (now V-USB) project without

success.

Can you provide some references or hints of how you succeeded? My strengths

are more in the embedded rather than the Microsoft domain.

Thank you,

Mark

Répondre

Anonyme 14 juillet 2009 17:21

Have you a link to the C# source code?

[email protected]

Répondre


6 of 15 15.07.2013 09:35

Tasos 23 juillet 2009 23:56

I can't seem to get it working, i get a message saying the device can't be

recognized by windows (XP SP2).

The pcb looks fine.

Should I try using 3,3V zeners?

Could someone please post a screenshot of the fuse settings or some detailed

instructions for them?

I am suspecting I've done something wrong there.

Répondre

Yves Lebrac aka Jacques L. 24 juillet 2009 03:59

UPDATE: for all who requested the C# code for this app, here is the link

usb-scope.zip done with Visual Studio 2005

Répondre

arash 8 août 2009 13:36

hi

how can i save some data in to EEPROM by your C# Application

Répondre

Anonyme 24 août 2009 03:29

Hi

It´s a wonderful project, I want ask you if this project is portable to attiny15?, it is

the only 8-pin avr microcontroller i can get where i live.

Thanks.

Répondre


how to program Atmel Tiny45 ?

Répondre


Hi,

It appears someone is selling your scope on eBay!

http://cgi.ebay.com/Xscope-USB-Scopemeter-2-Channel-Digital-

Oscilloscope_W0QQitemZ350226688621QQcmdZViewItemQQptZBI_Oscilloscope

s?hash=item518b232a6d&_trksid=p3286.c0.m14

The software appears unmodified also. Bill

Répondre


7 of 15 15.07.2013 09:35


Really interesting project indeed! The chinese "Xscope" sold on the Internet seems

derived from yours, Jacques. The commercial "USBscope50" looks similar too. Still,

those 2 versions have improved capacities, as it seems: Xscope would reach up to

2x60 Mhz, and USBscope50 reaches 1x75Mhz. 1/Do you know how they achieved

it? 2/is there a faster alternative than the ATtiny45-20? (I can't find any). 3/I guess

the ATtiny85-20PU is fully compatible and can be used instead: am I right?

Thanks/Merci for sharing! Sinus

Répondre


how i can increase the maximum input voltage from 5V to 30V? it's possible to use

a 2 resistor divider to do that? if is, please tell me the value of the resistor and the

schematic of connection

Répondre

Anonyme 11 novembre 2009 10:20

is it possible to use ATMEGA8 instead ? I have bunch of them on my desk

Dan

Répondre


Hallo,

i have build your project an it runs under XP, now i have windows 7 and it do not

work. Please, what can i do now.

Répondre

Mota 14 novembre 2009 11:08

what programmer do you recomend to send code to attiny?

Répondre

Branded USB Sticks 17 novembre 2009 08:08

Your project is looking very nice. I 'll try to get the same one. Thanks a lot for

sharing such a nice project.

Répondre


Hi magician13134,

I have the same problem, the yC gets the power from the USB and when I plugged

in the USB plug into my notebook, the LED is lighting for about 1 Second, then it

goes out. How did you solve this problem? Regards, atc

Répondre

Anonyme 6 mars 2010 04:19

hi i found your project on Hackaday, its awesome i've just been playing around with

attinys, i was wondering what is the value of the trimpot. i've got some 1k's and


8 of 15 15.07.2013 09:35

maybe a few 10k's

Répondre


what value trim pots do you use?

Répondre

Freddy 10 avril 2010 20:18

Hi, I'm having a problem with the project, when I plug the USB the led turns on for

one second and then it turns off, I can't find the problem, I'm using the 3.6V zener

diode and Windows 7 64bits, I'm also suspecting about the fuse configuration.

I'm not enabling the RSTDISBL and the DWEN because when I tried to enable them

"Studio4" displays two warning messages where it says:

"Disabling external reset will make the ISP interface inaccessible"

"Enabling DEBUGWIRE will make the ISP interface inaccessible"

just in case my e-mail address is (brackets are for avoid spam)

Thank you in advance for any help you can provide me.

Répondre

Azzura 22 avril 2010 08:58

how to make ATmega8 to do it?

what do i need to change?

mail me to [email protected] please,..

Répondre

watchout3 24 avril 2010 13:11

Hi,

Is it possible to put the needed files on another server (like 'www.uploadarchief.net'

, its free and no banners/'server overload'/...)

I cant download the hex or the eagle files because it says 'no available server

slots', and this is already for a few days so... :(

If you can/want to send it trough email to me, add a [DOT] before the nummer and

add @hotmail.com at the end

(i don't like spam...)

It seems like a nice project.

Répondre

Anonyme 11 mai 2010 17:22

Can you explain the 4 input pins? For what currency is it build?

Répondre

Yves Lebrac aka Jacques Lepot 19 juin 2010 02:18

here a few replies to some questions


9 of 15 15.07.2013 09:35

-no for tiny15, not enough memory.

-It is ok for Atmega8,48,88... but should need a 12MHz or 16Mhz crystal and some

minor modification in the code and the makefile, tiny45 has a high speed PLL wich

make it run over 12Mhz, and so, the firmware can locks itself to the usb clock.

-the bottleneck is that all the usb processing is done by software,

look at the ASM part in the usblib from ObDev, it is amazing.

-Yes, C# code IS available.

-the pot can be anything between 470ohm and 470k.

-if you want a 30v input, divide by 20, Rtop=60k,Rbot=3k.

-it is true tat this file server is a mess. But somebody has reposted on rapidshare.

-For me it is ok with W7, but not 64bits.

-The 4 pins are Vcc,IN1,IN2 and ground.

Thank you for all your comments

Répondre


This would be a wonderful device to use with oScope on the iPad.

... Do you know if it would adapt?

Thanks

MichaelG.

Répondre

Anonyme 3 septembre 2010 01:02

Hi,

primarily thank’s to share your project ;-)

I've many problems with USB interface. Only my notebook (old Acer travelMate

290, WinXP HomEd. SP3) with USB hub recognised your hardware. In the 'game

control panel' I found "Easylogger" and your application UsbADC recognise the

device. With the same USB hub and cable my 2 PC's (P4 3GHz, WinXP Pro. SP3;

AMD Athlon64 2,4 GHz WinXP Pro. SP3) will not recognised it. In the notebook run

well only when power cord is connected!

During run, in the 'game control panel' "Easylogger" disappears and, many time,

UsbADC notifies "my device was removed". Sometimes continues to run fine but the

USB interface will stop in 5-10 minutes. Many time I must change USB port or

restart O.S. What do you think about?

I've tryed to calibrate it with 1650mV DC but at minimum POT state (Rout=0;

1,2ohm misured), UsbADC show 1633mV, in both channels.

My USBscope configurations is:

3,3V Zener; 2x47kPot; lfuse=0xE1, hfuse=0xDD

Thanks a lot,

Roberto

Répondre

19پدرام septembre 2010 08:57

Hello,

I have a question, would you please answer it to my mail? it would be very nice if


10 of 15 15.07.2013 09:35

you do me this favor!

I want to know that if it is possible to have a scope with sample rate of at least 250

sample/sec ?

i mean making a scope like what you have made, using V-USB. i just want to know

your opinion if it is possible or not.

Thanks A Lot ;)

[email protected]

Répondre

Anonyme 30 septembre 2010 21:58

hi

can the pot be removed and connect that input by the same way that the other, like

in the image:

http://img825.imageshack.us/img825/5158/scopeinput.png

best regards

Répondre

confus 2 novembre 2010 14:12

Hey Jacques,

the only drawback for your scope is that the software is not cross platform.

You should write it either in Java or an interpreted language using a toolkit (gtk, qt,

etc.) and libusb.

Great project nonetheless. Thanks alot!

Répondre

Christoph 3 novembre 2010 15:23

Would be nice of you to include the eagle schematic as well. That would save me

some work trying to modify the design.

Also a few words on the exact working of the hid-interface are appreceated.

Thaks a lot

Répondre

Yves Lebrac aka Jacques Lepot 28 novembre 2010 01:17

-I don't think it is possible to go to 250 samples/s.

-Yes the pot can be removed.

-I am sorry for the soft in .Net, but it is the only way i know how to write code to

acces a hid device!.

-For those who have trouble with the hardware, i must say that in some case with

some PC USB host chips, it does not work. We have built a lot with my students as

school projects and there is a failure rate of about 5%. Using a USB Hub generally

solve the problem.

Répondre

Anonyme 28 décembre 2010 15:23


11 of 15 15.07.2013 09:35

can u add multipler to the software, maybe default multiplier is 1 and we can adjust

that so if we use voltage divider the software can show the real voltage. Thx

Répondre

Petar 5 janvier 2011 20:57

Thank you very much for such nice sharing!

But, here is not available ATTINY45-20, except some ATMEGA8, 88..., but also is

available ATTINY44-20PU in DIP14 package.

- Please do you can tell me whether and how I can use that ATTINY44-20PU in this

your application, and how to connect him.

Now I very need such oscilloscope solution like your, but I have not experience with

microcontrolers and with programing.

So, please do you can send me over my e-mail [email protected] or here, at

least your basic directions how to make that.

Best regards!

Peter

Répondre


Could you build one for me? Can I order one from you?

Reply-to at [email protected]

Répondre

Big Guy 19 mars 2011 00:04

does anyone know if it will work with attiny2313?

Répondre


Hi,

thanks a lot for this wonderful project!!!

i´d like to build it into every wasted mice and hub i can find :)

I hooked two 1N4007 between VUSB and the circuit -- now it gets recognized and

works great. WINXP; USB1.1; no hub (at first i had the "led turns on for a second

and turns of" problem; i have 3,6V zeners and i have not removed them after adding

the 1n4007 s)

THANKS!!!

ps: i used a homemade si-prog programmer to flash the tiny (1 transistor and some

passiv if you don´t need the supply ... needs a rs232 and would not work with

(many) usb-rs232 adapters

Répondre

Big Guy 11 avril 2011 20:28

any possibility of getting a macosx host software for this piece of genius?

anyone familiar with xcode, please?!

Répondre


12 of 15 15.07.2013 09:35

Anonyme 4 juillet 2011 04:49

Hi

Really nice.

I tried to change it to Mega8 but without good results.

Is posible to give some details on what to change in software ?

Did somebody did it rum with mega8 ?

Thanks

Répondre

Pere 2 septembre 2011 11:25

Hello!

Whay is the actual bandwith of this oscilloscope? I can't find it anywhere on the

specs...

Also, hundreds of samples per second isn't a bit low?

How does it compare to using a soundcard as an oscilloscope? Is this better or

worst?

Thank you!!

Répondre

Dheeraj 8 janvier 2012 05:10

I made one yesterday and its working very much fine.

Actually i need to find the frequency of my output waveform but am unable to find it

here.Also the software is in french which i dont know, but am able to use the

software upto some extent.

Please put up an english version of the software along with multiplier as we use a

voltage divider.Also make changes to software so that it can read the frequency..

Thanks for the project.:)

Répondre

Dheeraj 16 janvier 2012 15:56

I need to find the frequency of my wave, how can i do it using this one.The

oscilloscope is working fine and thanks to you for sharing it with us.

Please update the windows software by making it to read the frequency of the

wave and also add a multiplies as many of them use a voltage divider.:)

Thanks in adavance

Répondre

Cichaczech 13 mars 2012 20:16

Great prject, I assembly it, but when I conect to the PC, led turns on for one

second and then it turns off. I Tried on XP and Windows 7 32bit.

Répondre

Cichaczech 13 mars 2012 20:17

Great prject. I assembly it, but when I conect to the PC, led turns on for one

second and then it turns off. I Tried on XP and Windows 7 32bit.


13 of 15 15.07.2013 09:35

Message plus récent Message plus ancienAccueil

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one tree hill season 7 dvd 22 mars 2012 10:35

I never hear about this part, it is amazing.

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Augusta Tina 27 avril 2012 09:18

Really you have done great job,There are may person searching about that now

they will find enough resources by your post.I like this blog.

Logo Design Services

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Milka2009 8 août 2012 18:33

https://www.youtube.com/watch?v=_aGmsRJ2tG4

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Zaid Pirwani 5 mars 2013 18:41

Some links not Working..

The USB Driver, Firmware Source Code etc... please HELP..

THANKS for a good project.

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14 of 15 15.07.2013 09:35

Modèle Awesome Inc.. Fourni par Blogger.


15 of 15 15.07.2013 09:35

monspace_ The cheapest dual trace scope in the galaxy.pdf

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