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Christmas Tree in a School Locker

Christmas Tree in a School Locker

Christmas tree set up in my daughter’s high school locker. Based on an Arduino/Waveshield combo, it will play one of 6 random songs and display one of 6 sequences on the LED string. The LEDs are the 12mm tri-colored string available on adafruit.com where the Arduino and Waveshield were also purchased. When the door is closed, the magnetic door switch will power off the system.

Wave_Shield

Adding quality audio to an electronic project is surprisingly difficult. Here is a shield for Arduinos that solves this problem. It can play up to 22KHz, 12bit uncompressed audio files of any length. It’s low cost, available as an easy-to-make kit. It has an onboard DAC, filter and op-amp for high quality output. Audio files are read off of an SD/MMC card, which are available at nearly any store. Volume can be controlled with the onboard thumbwheel potentiometer.

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