TOUHIA TCRT5000 Photoelectric Sensors Reflective Optical Sensor with Transistor Output Infrared 5V 3A For Tracking and Obstacle Avoidance Car(40PCS)

hello I'm Luis from DIY machines and I'm going to explain to you a bit about the ttrt 5000 optical reflective sensor what does it look like this is 80 CRT 5000 will often see it on a board alongside an LM 393 and adjustable potentiometer what can it be useful it can be used to detect the presence or absence of a reflective object such as the presence of a coin or to check the color of something on a black to white scale useful for a line following robot how does it work the TC RT 5000 itself works by transmitting infrared light from the LED and registering any reflective light on its photo transistor this alters the flow of current between its emitter and collector according to the level of light it receives there are a couple of features tonight one is just piece of plastic here that acts as a shield between the transmitter and receiver the second is that this photo transistor is cover