Quantity   Component name
1 × ProTrinket Adafruit's ProTrinket with atmega328 microprocessor
1 × Ultrasonic ranging module Started with Sharp's 2D120X IR sensor, but switched to an ultrasonic sensor with bigger range (HC-SR04)
1 × PushButton 4x-pin pushbutton
1 × LCD display with I2C I2C compatible lcd display
1 × 10K resistor
1 × 3D-printed case Extra component. We're going to need help from some friends
1 × 3.7V LiPo battery not used for thew time
1 × Adafruit ProTrinket LiIon/LiPoly BackPack not used for the time
1 × A potentiometer
1 × Jumping wires