Relishing in the process of invention
A. Sue Weisler
Professor Carl Salvaggio and his son, Phil, a doctoral student in imaging science, built a digital music player for their car because they could. They programmed a Raspberry Pi electronic interface— a $35 general-purpose computer the size of a deck of cards—to play a random selection of their favorite music from a thumb drive.
For the Salvaggios, making a digital music player had less to do with the music than the process of invention. After all, they could have hooked up their iPods instead.
“I had more fun making them than actually using them,” says Carl Salvaggio, professor in the Chester F. Carlson Center for Imaging Science. “Now they’re just part of what a car ride is. I canceled my Sirius and XM service because I replaced it with this. But most of it was being able to work together. It’s fun to build something. We don’t do that enough anymore.”
The music player sits in a small box n the trunk of his son’s car. A larger prototype using a Mac-Mini instead of a Raspberry Pi board is in the back of Salvaggio’s car. The original model requires a power supply and a fan. The Raspberry Pi version streamlines the Salvaggios’ idea in a more robust package powered by the car’s ignition.
“We wanted to make a little computer that, when you turn the car on, boots up and reads music off a thumb drive,” Salvaggio says. “It scans the thumb drive, finds and randomly orders your music, and then starts playing it. The whole idea was to put it in the trunk so you don’t have to interact with it at all. So you’re not distracted driving.”
They programmed the Raspberry Pi to look for a signal coming from an old garage door opener to skip to the next song.
“You still have that little bit of a distraction from hitting the garage door opener, but it’s not like fumbling with your iPod,” Salvaggio says.
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