Quantity   Component name
1 × ATtiny84 development board See my other projects for more information
1 × HC-SR04 Ultrasonic Distance Measuring Transducer Sensor
1 × SH1106 OLED display 1.3" OLED display (SPI version)
1 × 3.7V 350mAh LIPO battery
1 × LIPO connector (2-pin)
1 × 18 GAUGE metal wire