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"digital chaotic signal generator" need help!

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by pyramos, Nov 5, 2003.

  1. pyramos

    pyramos New Member

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    I have to make project which is "digital chaotic signal generator" . I have to use a microprocessor while doing this project. which microprocessor i have to use? can anyone who knows some information about chaotic signals help me?
     
  2. crust

    crust New Member

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    Does this mean you want to build a microprocessor based system that will output a random sequence of bits?

    You can use a monte carlo algorithm to build a pseudorandom generator. Alternatively, you can use the amplified Johnson noise of a resistor (or other noise source, perhaps, internal to the amp) and some glue logic to sample the noise signal at one of your inputs.
     
  3. pyramos

    pyramos New Member

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    Yes I want to build a microprocessor based system but it's output is not exactly random sequence of bits..Its seems like that but whenever I want, I produce the same output..Its output must be a chaotic signal, not a random signal. I don't know which microprocessor or microcontroller I must use and which algorithm can be used to program the chip.
     
  4. dave

    Dave New Member

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  5. crust

    crust New Member

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    One way to do it would be to synthesize your signals externally (perhaps in matlab, etc). Then load your signals into the flash memory or external eeprom. Then use the serial port / pushbuttons to trigger which signal is selected from memory and output from the pin.

    I did something similar in order to synthesize a sine wave and control an inverter.
     
  6. Roff

    Roff Well-Known Member

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    Do a Google search on "linear feedback shift register" and "pseudorandom bit sequence". This technique allows you to start from a point in the sequence which will vary depending on the seed you give the sequence.
     

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