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GPO-39 - Audio Switching / Amplifier #3

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andy-preston opened this issue Nov 14, 2023 · 0 comments

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andy-preston commented Nov 14, 2023 •

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Tests needed for amplifier switching control

Fake telephone exchange sounds for dial tone & misdialed number
Real sound playback for ringing/engaged tone and conversation

Amplifier
Switching Electronics
Microcontroller Signal Line
Audio Connection
Could we also interrupt audio very briefly in time with dial pulses?

https://www.raspberrypi-spy.co.uk/2014/07/raspberry-pi-model-b-3-5mm-audiovideo-jack/
https://www.epanorama.net/newepa/2014/09/15/android-device-external-mic-wiring/
https://www.electroschematics.com/intercom-circuit-intercom-schematic/
https://youtu.be/4ObzEft2R_g

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