User:Wordfa/oldphonehack

Phone Hacking Project

Project for SS25 to create a story gathering system using an old phone.

T65 Rotary Phone bought by Sevgi n' Fred

USB interface to 3.5mm

https://www.adafruit.com/product/1475

3.5mm Cables

Old phone (T65)

Raspberry Pi

We took it apart and got the speaker to work. played show me the body, was good.

11 (Neg), 12(Pos) speaker output

Then we tried the microphone but its carbon and it didnt work. so u atttached a batery and hoped. didnt work

We took apart wired headphones that had mic in them to see if we could use the mic from it rather than the carbon mic in the telephone.

didnt work, headphone calble is trrs not trs:

spent a day trying to wire up trrs to an audio cable, turns out the audio jack was the wrong kind.

then wired it directly to a trs jack, worked!!!!!!!!

then cable managed, looks beautiful now. now we have working speakers and working mic.

This is how you could make it work too:

From the headphones you need to...

Connect th Blue (Ground) to the Sleeve of the TRS jack

Connect the Red (mic) to Pin (Ring) 1 or 2 of the TRS

next steps:

work out how to read the keypad input on the raspberrypi.

Microphone from handset

https://www.youtube.com/watch?v=rIkIkbOw3OQ&t

Rotary Pi

Lofi Mic

https://www.youtube.com/watch?v=7gorBkdk8zY

Schematic (v scary)

Rotary MP3 Player

Info on the T65

https://www.cryptomuseum.com/phone/t65/index.htm