I have a few 3x4 landline phone keypads lying around... I was wondering if I could use it as input for the arduino.
The wire that goes from the keypad/speaker/mic to the phone base has four pins.. Does anyone have any idea what they are or how I could find out?
How could I find out the type?
The phone was from At&t-- it says "AT&T Trimline 230"
I founded images of it-- but that's not what I'm trying to get. I want to get the key presses to my Arduino.
I founded this:
"Our silver satin jacket flat modular phone cord is terminated with RJ11, plug on both ends. This phone cord has 4, conductors and reverse wiring with the following 4 pin colors (pin1 -- pin1 (black), pin2 -- pin2 (red), pin3 -- pin3 (green), pin4 -- pin4 (yellow)). Reverse wiring is generally used for voice application."
here: http://www.cyberxlink.com/store/c/427-RJ11-6P4C-Silver-Satin.aspx
But it only helps me with the colors. Black and red are probably power (but who knows...), green and yellow maybe data and audio? I'm not sure.
Objective:
I want to (if possible) use the 4x3 KEYPAD from an old landline as input on my arduino.