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  • doragasu commented on rjkorn's instructable Call Blocker / Telemarketer Stopper2 years ago
    Call Blocker / Telemarketer Stopper

    Good instructable!I did a lot of time ago something similar, but I went a bit crazy and implemented all the functions using a single chip (a dsPIC). It does signal acquisition, FSK decoding, CID command parsing, audio playback using PWM technique, SD card handling (for storing a call log and for reading audio files), etc. If interested, you can find it here: is also a github repo with schematics and sources:

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