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This creepy PCB has red LED eyes and eerie sound comes out of its slotted mouth (loudspeaker is on the bottom side). The sound is generated by an ATMega32 MCU. Any wave file can be converted to 8 kHz samples and inserted into the code (thanks to Rejith, see http://avrpcm.blogspot.com/2010/11/playing-8-bit-pcm-using-any-avr.html?m=1 for more details about MCU firmware). The power is provided via a microUSB connector (no data lines, just power) and will therefore start to spook as soon as connected to any USB port (might also possess the device at the other end of the cable, use at your own risks). The ATMega32 can be programmed using the ICP connector. All the parts are on the bottom side and only the LEDs on the top side. Note the ghost's pupils are the LEDs cathode mark. Happy Halloween!