fischertechnik TCRT5000 infrared reflective sensor
thingiverse
A compact infrared reflective sensor for fischertechnik, based on the [TCRT5000 reflective optical sensor with transistor output](https://www.vishay.com/docs/83760/tcrt5000.pdf). I needed them for a line-following robot. Use an analog input pin to measure the signal (sensor out pin). You can use an additional digital output pin to turn the infrared LED on (high) or off (low) (LED on/off pin). Compare two measurements with the LED turned on vs. off to filter out ambient light disturbances. If you don't need this, just connect 5V to the LED on/off pin. Part list: 4x4 perfboard PCB, 2 SMD resistors 4,7k-10k as pullup and 150 (100 will work, too) for the LED. Please post your make or "like" this thing as a token of appreciation for my work. Find my other fischertechnik designs [here](https://www.thingiverse.com/juh/designs). https://youtu.be/hU7KIjeh6Fw
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