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This tutorial will explain how to hack a rotary telephone and convert the analog numerical values into digital values using a computer, a microcontroller and software. Find two rotary telephones.
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Remove microphone piece and replace it with an ear piece from 2nd rotary phone
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Mount earpiece in former microphone cavity. This earpiece wih serve as a microphone.
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Use a mini-jack stereo cable and cut off one end. Remove the casing. There are two cables inside. Splice casing from each cable and twist the ground wires together.
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Attach mini-jack stereo cable to end of the telephone.
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Wire 4 ends into 2 stereo cables. One for the mic and one for the ear.
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Alternatively, you could use the end of the telephone jack's terminals to wire stereo cables.
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use hot glue. Notice 2 cables: One for ear and one for microphone. Plug both stereo cables into computer.One for mic input and one for audio out.
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To convert analog numbers into digital numbers, remove casing.
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-locate the red and blue wires-screw two wires into each terminal. The rotary mechanism is the brain of the device. Each number dialed corresponds to a pulse. Example "0" is equal to 1 pulse and "1"is equal to 2 pulses.
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Mount the two wires-1 wire goes into ground and the other wire into signal of a microcontroller.(phidget or arduino.) We are going convert an analog signal into a digital one
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Two wires mounted into the digital input of a microcontroller. A software
patch will convert analog signals numerically into digital signals.
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email me for patch on how to convert analog signal into digital signal..using Pure Data or Max/ MSP.