I believe one of these three sensors would work out. Wich one is the best? I chose the PING))) Ultrasonic Sensor, the PIR Sensor and the Si1143 Proximity Sensor. All of them from Parallax.
I believe one of these three sensors would work out. Wich one is the best? I chose the PING))) Ultrasonic Sensor, the PIR Sensor and the Si1143 Proximity Sensor. All of them from Parallax.