How we created the NovoSIP

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    The Raspberry Pi contain all the features for the audio and video management except the audio input.

    For the calls and the door opening we have developed an IO electronic board connected to the GPIO.

    The simplest solution for the audio was found by using an USB audio dongle connected to a microphone when the audio output of the Raspberry Pi was connected to an amplifier we developed on the IO board and connected to a 40mm speaker (8Ohms).

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