Here is the diagram of my Arduino infrared close proximity sensor. As you can see ... when an object has been dropped at a given location. The system works by emitting a pulsed infrared light and by ...

The kit’s board also includes a proximity loop which can detect the presence of a finger or hand up to 30cm away. The CapSense MBR3 devices are register-configurable, and require no firmware ...

[mircemk] shows how to create a simple non-contact proximity sensor using little more than an Arduino Nano board, and a convenient software library intended to measure the value of capacitors.

To fix this problem, he added an ambient light sensor. The Arduino can detect the amount of overall ambient light and then adjust each reading to compensate. He says it’s not perfect but the ...