To play mp3 files on raspberry pi you could use the omxplayer. Install it over terminal via: sudo apt-get install
Dieses Jahr geht es bei meiner Weihnachtspost um elektrisch leitende Farbe, Elektronik auf Papier - allg. Paper Curcuits - und winzig, winzig kleine LEDs.
I recently needed to do a fast motion detection for an installation. The problem was that I didn't know the final environment where it would happen. Classic motion detection sensors work with Infrared detection and have problems with direct sunlight. So I had to do my own solution.