Electronic kits and parts - build, code, and learn!
Place the Infrared (IR) light barrier strategically so it can warn you when someone is near! Applications : announce visitors, warn against burglars, set boundaries, science projects
Note: this kit requires soldering - please see the pictures for an idea of number of components and complexity. This is an educational kit.
The kit has a good range (4M) and works well. Possibly link to digital counter as an option.
micro:bit Complete Starter Kit, including the Kitronik Inventor's kit
Bit:Bot v1.2 micro:bit Robot + Ultrasonic Sensor
MonkMakes Electronic Starter Kit for BBC micro:bit
Kitronik Mono Amplifier Kit Version 3.0