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December 5, 2016 AT 1:37 pm

Payphone Upgraded to 1990s ‘Boombox’ #phreak #MusicMonday

And yes, the commercial ‘personal pay phone’ was gutted in the process!

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When I first started this project I suspected payphones would be hard to get, expensive, and a hassle to hack. I was wrong on all three! Online I was able to get city-grade cast-iron/stainless payphone for relatively cheap. And the hack, surprisingly, turned out to be quite elegant 🙂

With my payphone hack I created a the 90 From The 90’s Boombox:

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Hat-tip to Donald Bell’s Maker Project Lab update #12 for the tip about this wonderful project!


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Stereo 20W Class D Audio Amplifier – MAX9744: We like the MAX9744 amplifier at the heart of this board because its very easy to use, but it also has both analog and digital volume control capability. Use a single 1KΩ pot (we include one) to adjust volume analog-style. Or hook it up to your favorite microcontroller and send I2C commands to set 64-steps of volume amplification. Read more.

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Adafruit “Music Maker” MP3 Shield for Arduino w/3W Stereo Amp – v1.0: Bend all audio files to your will with the Adafruit Music Maker shield for Arduino! This powerful shield features the VS1053, an encoding/decoding (codec) chip that can decode a wide variety of audio formats such as MP3, AAC, Ogg Vorbis, WMA, MIDI, FLAC, WAV (PCM and ADPCM). It can also be used to record audio in both PCM (WAV) and compressed Ogg Vorbis. You can do all sorts of stuff with the audio as well such as adjusting bass, treble, and volume digitally. Read more.


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