Quantity   Component name
1 × VL53L1X The VL53L1X is a state-of-the-art, Time-of-Flight (ToF), laser-ranging sensor, from STM. It is the fastest miniature ToF sensor on the market with accurate ranging up to 4 m and fast ranging frequency up to 50 Hz. It integrates a SPAD receiving array, a 940 nm invisible Class1 laser emitter, physical infrared filters, and optics to achieve the best ranging performance in various ambient lighting conditions with a range of cover window options. Unlike conventional IR sensors, the VL53L1X uses ST’s latest generation ToF technology which allows absolute distance measurement whatever the target color and reflectance. We used a "BB-VL53L" board available in a variety of places.
1 × Small Arduino board, mini/micro/nano/any
1 × Case that takes batteries and electronics
1 × Male and female mono jacks for connecting speager.
1 × Small audio loudspeaker salvaged from laptop, tablet, phone This is actually used for tactile feedback