As photons (light) land on the detector, the resistance will decrease. The more light is we will have a lower resistance. By reading different values from the sensor, we can detect if is it light , ...

Also, while the green one of the LEDs is on, the RGB LED is also flashing green. when the system is activated, the red led lights up and the buzzer starts to play the note "Si". Meanwhile, the RGB LED ...

I recently had to build an infrared close proximity sensor that could tell if something was dropped in a parcel delivery drop box. After some searching, I ...

$6 Maker UNO Arduino UNO Clone Comes with Micro USB Power, I/O LEDs, and a Buzzer Arduino UNO is one of the older Arduino boards, but also one of the most popular, and there are already many clones, ...