Quantity   Component name
1 × ATMega328P Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
3 × 0.1uF 0805 ceramic capacitor
1 × 1uF 0805 ceramic capacitor
1 × 22uF 0805 ceramic capacitor
1 × 10 uH 1210 SMD inductor
1 × 8 MHz SMD resonator DigiKey 490-1195-1-ND or 478-4584-1-ND
1 × LTC3525 5V regulator DigiKey LTC3525ESC6-5#TRMPBFCT-ND
2 × 10K 0805 resistor
3 × 180 Ohm 0805 resistor
3 × 5mm LEDs
1 × 3x2 male header DigiKey 952-2120-ND
1 × 4 position angled female header DigiKey SS479-ND
1 × 6 position male header, angled or straight
1 × HC-SR04 ultrasonic distance sensor
1 × BS170 n-channel MOSFET
1 × SPST pushbutton DigiKey SW400-ND
1 × 2AA battery holder RadioShack 270-408
6 × Neodymium magnets, nominal 1/8" x 1/16" Amazon: http://www.amazon.com/dp/B0065O63BK