TCRT5000 Reflective Infrared Sensor Photoelectric Switches - Black + Silver (10 PCS)

Pros: This is a very cheap sensor considering its usefullness. I am using it with Arduino to make a line follower robot.

Cons: I is not easy to mount it correctly, 2 resistors can be needed to connect the tcrt5000, one 4K7 and one 100 ohms. The E and C (down) are both connected to ground. The C (upper left) has 2 connections in paralallel: one goes to the 4K7, and that goes to 5V. The other goes to one of the Arduino analog ports. The A (upper right) goes to the 100 and that goes to 5V as well.

Other: I am very happy for my purchase.

Pros: Funciona como esperado, boa qualidade, estou muito contente com a minha compra, já estão a funcionar num circuito que eu construi. Works as expected, good quality,I'm very happy with my purchase, , I have been running a circuit that I built.

Cons: Nada Conntra. Nothing against.

Other: nada a apontar, recomendo a toda a gente que precise deste tipo de sensores. nothing pointing, I recommend to everyone who needs this type of sensors.