I got tired of handing out candy during halloween, so i built this circuit and programmed it so I can leave it on the front porch with a bowl of candy. This is an ATmega168 microcontroller hooked up to an SD card over SPI and an SPI DAC with an infrared proximity detector to know when people are approaching. Unforutnately there is some background noise when the proximity detector is connected. If I remove it from the circuit, it's perfectly clean. Owell :(. For schematics and stuff visit http://www.mikekohn.net/micro/sd_mmc_sound.php
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