Lidar 3D Room Scanner
IRLU2905 - SMD Mosfet N Channel £6 for 5
1 * Keyes Hall/Holzer Effect Sensor Module - KY-003 44E 938 Arduino Pi Flux Workshop £2.59 Mini Magnet 1* 50mm by 50mm First Surface Mirror (Aluminium but gold is better). 1* 5mm by 5mm by 5mm Magnet (£2.99 for 10)