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i would like to generate Chirp Signal (Frequency Sweep) using Arduino. i have searched a lot in internet but didn't find anything.

Basically, any parameters is also ok. But the concept is what i am searching for. The signal will be sent to the DAC of the Arduino board.

Edit I would like to generate sine wave signal from 3kHz up to 100kHz sweep frequency with amplitude peak to peak 1.5 volt.

thanks for your support.

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That's a potentially complex subject. Providing more detail about what you are trying to do and why will help you to get better answers (or any answers). I assume you mean chirp in the DSP sense - swept-frequency cosine signal with unity amplitude and continuous phase. OR you could mean simply a frequency swept signal - as people sometimes use the term. Or you may be talking about crickets :-).So ...? –  Russell McMahon Feb 4 at 9:52
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(1) What frequency range, and what sweep rate, do you want? (2) Why do you want it? ie, what is it for? (3) What "DAC module" do you mean? Some shield? [Please edit your question to answer these items, rather than answering in comments.] –  jwpat7 Feb 4 at 17:27

1 Answer 1

up vote 2 down vote

Recommend to use a VCO PLL as external hardware device to get the wanted variable-frequency signal. The DAC output from Arduino can control the voltage to external VCO PLL module. Here is the link for an app note for VCO PLL from Vectron.

http://www.vectron.com/products/vcxo/vcxo.pdf

Hope it helps.

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Thanks a lot. it nice suggestion –  user3213767 Feb 5 at 16:43

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