View source for Make Munich/Telefon

{{project
| name = Telefon
| status = experimental
| description = Phone system for fun, at Make Muncih 2017
}}
The basic idea is to have some old rotary dial phones spread around the Zenith during the Make Munich. Everybody should be able to talk to anyone who picked up a phone anywhere in the hall.
It would also be cool to trigger some actions by dialing a specific number.

== Hardware ==
=== Phones ===
* 4 rotary dial phones

== useful Links ==
* [http://www.bayern-online.com/v2261/showprod.cfm?DID=203&User_ID=27705267&st=878825006&st2=461537426&st3=333032336&ObjectGroup_ID=4967&CATID=1349 how to connect two phones]
* [https://farm3.static.flickr.com/2646/4170130685_7420134b1e_o.png Arduino Interface]
* [http://forum.arduino.cc/index.php?topic=172116.0 "Phone off the hook?"-circuits]
* [http://www.epanorama.net/circuits/telephone_ringer.html Detect a ringing phone, or make a phone ring (bottom of the page)]
* [https://github.com/paul0x1C/arduino_pulse_dialing_to_serial/ ardunino sketch to interpret pulse dial]
* [https://www.mikrocontroller.net/topic/286089?goto=3036989#3036989 how does a phone work?]
* [https://www.mikrocontroller.net/topic/298084?goto=new#3188827 connecting an analog phone]
* [https://www.mikrocontroller.net/topic/297865#3222663 small diy analog pbx]

== ideas for "services" ==
* loud elevator horn
* Alexa
* elevator music
* time service
* working node-red
* "kein Anschluss unter dieser Nummer"
[[Category:Project]]