Hardware design to retrofit GPO style phones allowing playback and recording of high quality audio from a Raspberry Pi for use as an electronic guest book for weddings
- Handset microphone capsule replacement utilising a USB audio interface IC and MEMS microphone fitted into a custom 3D printed enclosure
- Custom 3D printed bracket to hold a high-fidelity replacement speaker
- Replacement PCB to fit into phone base, to securely hold and connect a Raspberry Pi using custom GPIO for the hook switch
- Consideration taken into account for the fact completed Phones will spend a large amount of time in customer facing rolls and shipping
Phone
Assembled base into phone
Prototype switch cover to prevent it coming loose during shipping
Base PCB
Assembled microphone PCBs, containing USB sound card and mic
3D printed bracket to hold speaker in place
