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Behzad 650KSPS Digital GLCD Oscilloscope v1.0

نسخه فارسی

It was four years ago which I needed an Oscilloscope to be able to see the received codes from PT2272. (This is a Remote Control Decoder chip).
Later on I made so many other things with this device which I will explain it later . ( such as the measurement of the low value voltages and even the supplies with high values and so on...).
Although on that time I was in hurry so didn't design a PCB and I mount it on a pure, bread board. Its a good portable one, as the Battery is put on it, so you can have it in your pockets !!!

Its characters:

• Graphical LCD screen, 64*128 pixel dots (GDM12864A with KS0108 processor or other compatible)
• Microcontroller ATMEGA32 with an external Quartz clock generator, 16MHz max speed
• To increase the speed it is used an external ADC0820 converter chip, not the build in one.
• All the operation of system is in digital
• Able to get the positive and negative cycles
• Able to show the voltage values in the range of +/- (.01 to 250) volt
• Time Division ; Volt Division ; Trigger level
• High input impedence about 1Mohm
• The components are chosen such to be easily found, with an adequate price;
• By adding an external serial E2PROM, you will be able to save the records ,..
• Activate the options for gridding, division ,..
• In general it has some possibilities and it is not comparable with any other similar things (like LED Oscilloscope or PC Sound Card Oscilloscope );
• The speed is about 650,000 Sample's per second (This is limited By ADC and AVR speed), so its able to show about 60khz frequency signal

( At the above picture I touched the input and so the sine wave has some distortion
you can see a small line at the left side that indicate the Trigger level )

  you can get schematic diagram from here .

  and full package and whatever you need to build this oscilloscope can be download from here.
 ( this package contain AVR HEX firmware , Schematic diagram and some project picture's BUT without source code, you must purchase Full C-CodevisionAVR source code ).

Mr Ehsan Haddadi Has designed a Protel PCB file for this project that you can get it from here (special thanks to Ehsan) .

Please let me know any bug's or your suggestions and I will be so glad if you send me your ideas or any modification's to this project .
and in conclusion, I wish that you build this project and it can be useful for you .

Special Thanks to Mahsa Nemati, Technical University, Budapest for Translating most of This page from Farsi to english.