RotaryCell: Making an unmodified rotary phone work over LTE with an ESP32-S3

(github.com)

50 points | by jombib 6 hours ago

5 comments

eggfriedrice 9 minutes ago

Lovely job, I like the "here's where I've got to so far" style. This gives people enough to work from and make a hand-wired version while he's waiting for boards to come back. Even if he runs out of time to do anything it's leaving a working design and firmware for folk to start from.
It's definitely too easy to put off publishing until it's "properly" done and then it never happens.
hi_hi 26 minutes ago

When I finally agree to cave in and buy a phone for my soon-to-be teenager, little does she know this is the phone I have in mind…

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- throawayonthe 18 minutes ago
  
  i wouldn't want my child making unencrypted calls :p
  
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  - boxed 13 minutes ago
    
    Doesn't this project go straight into modern standard mobile phone systems? It'll be encrypted then.
Trace88 3 hours ago

Love seeing old tech brought back to life like this. The tactile experience of dialing is just something else.
jombib 6 hours ago

https://www.reddit.com/r/esp32/s/eSlEHcXbJ0
andrewstuart 2 hours ago

Slightly off topic but you can also use a SLIC module to talk to old phones:
https://youtu.be/nibV_idJjlg
https://www.ebay.com.au/itm/305557776577

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- monocasa 2 hours ago
  
  This project uses the same AG1171 SLIC module; it's just not enough by itself and still requires a microcontroller (or at least non trivial logic) even before you get to processing the audio streams.