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Colin writes – “This project attempts to achieve the same functionality as a traditional oscilloscope, using a PIC microcontroller for data acquisition (including appropriate analogue circuitry) which transfers the data to the PC (possibly via RS232, USB or Parallel). A Microsoft Windows based software application will then display the waveform as it would appear on a traditional CRT oscilloscope. This software application will have additional features not present on a traditional oscilloscope (e.g. printing / saving waveforms) with greater flexibly as additional features can be added as their developed without the need for new hardware.”Link.

12 thoughts on “Low cost oscilloscope

  1. 395 for the cheapest bitscope is a bit steep… this solution seems much cheaper, like under $100, not bad either.

  2. 5.75Khtz, scope. I speak higher pitch than that!

    good effort. but a faster processor is needed then 20Mhtz.

    and serial is a sad way to transfer large amounts of data.

    Phillips makes some nice chips that grab data at a nice high speed. then you just need to interface them to a processor that would push the data onto USB. and you have a decent speed scope.

    why not use WinScope. it’s an old windows program that uses your soundcard as a 2 channel input.

    unforutantly it is only AC, but at least it will do 45KHtz.

  3. Did any of you implement continuous-time sampling? i.e. sampling/logging on the computer for an extended period of time to grab an entire serial transaction? I would think that (at least for the MAX chip) with a max clock of 20MHz and max ADC freq of 1Msps, there wouldn’t be enough CPU cycles to read the data and process it (especially when transmitting buffered packets to a PC).

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