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37C3 - Analog rotary phones get a second life with raspberry pi
Turn old analog rotary phones into a modern communication system with Raspberry Pi, enabling nostalgic connections and DIY innovation.
- Analog rotary phones can be given a second life using a Raspberry Pi.
- The project aims to connect at least eight phones and allow them to communicate with each other.
- The system uses a rotary thread to count pulses from the rotary dial.
- The front end circuit generates signals, including the ringing tone.
- The system uses Gstreamer to generate DTMF pulses for connecting to the Fritz box.
- The ring trip stops the connection when someone lifts the receiver.
- The main state machine monitors the loop close signal and counts the number of pulses.
- The system uses a select function with a timeout to determine what’s happening.
- The project aims to get the international feeling of the phone by using different ring tones and frequencies.
- The author has not approached any museums or telecommunication exhibitions with the project.
- The system uses a transformer to boost the voltage to 100 volts for the ringing tone.
- The author is open to improving the project and making it more efficient.
- The system uses a PCB to implement the circuit.
- The author has not published the project and has only shared it with friends.
- The project aims to provide a nostalgic experience and allow people to connect with the past.
- The author is looking for feedback and suggestions on how to improve the project.
- The system uses a conditional rate to control the ringing tone.
- The author has not implemented the switch matrix fully.
- The project aims to be a hobby project and not a commercial product.
- The author is open to sharing the project with others and making it a community project.
- The system uses a JFET for the connection matrix.
- The author has not published the schematics for the project.
- The project aims to provide a unique experience and allow people to connect with the past.