The idea here is to create a super-easy-to-use mp3 player for my nearly blind father to enjoy his audiobooks.
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Step 1: Raspberry PI and Peripherials
After searching the web I found "The One Button Audio Book Player", a Raspberry PI project using one button, one led and the Music Player Daemon software. Check out:
Step 2: Integration
The features desired are:
Easy to use:
One button for play/pause and restart previous track;
"One pixel monochromatic display";
Minimum additional work on the donor equipment:
Lazy installation of an old usb phone charger (stealing 110V from the same mains input cord);
Removal of tape player and connection of phone jack to audio outputs;
Step 3: First Tests
Botton used was "Play" converted to momentary switch.
Led hole drilled on front panel and glued in place.
Step 4: Final Tweaks
Last steps involved adjusting audio output volume (80% in my case).
Headphone output from the Raspberry PI was connected to tape preamp output.
Participated in the