8/3/2023 0 Comments Arduino based cw decoder![]() Without more information about the hardware you are using, there's not a lot to add here. For example, if you have a microphone as your sound input source, you will need to amplify the signal (and maybe add some automatic gain control) before feeding it into an ADC (analog to digital converter) that has a 5 V input range, since the microphone may have an output in the mV range. Items (1) and (3) are related, since you need to know how you are going to digitize the signal before you can choose the right amplitude.
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