TCRT5000 Infrared Reflective Sensor

TCRT5000 Infrared Reflective Sensor - How it works

Here is a brief overview of the TCRT5000 Reflective infrared sensor. I'll cover how it works and show you an example circuit and code for you to use yourself

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List of items used in this project and where to find them:

TCRT5000 break out board: http://geni.us/TCRT5000

Arduino Uno: http://geni.us/ArduinoUno

Jumper Wires: http://geni.us/JumperWires

Breadboard: http://geni.us/MiniBreadboard

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The code can be downloaded from here: https://github.com/DIY-Machines/TCRT5000

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Sensorless Homing with RP2040 & TMC2209

By Lewis • February 24, 2026

In this video, I’ll show you how to set up sensorless homing using a TMC2209 stepper driver — no mechanical limit switches required! Perfect for 3D printers, CNC machines, robotics, and other DIY electronics projects. I’ll guide you through the wiring, Arduino code, and how to tune StallGuard for accurate, reliable homing. Whether you’re building a CoreXY, a custom motion control system, or just want to learn more about stepper motor drivers, this is a great place to start. Let’s build smarter! Why would we want to use sensorless homing? Well first the Pros…. There’s no need for extra mounts, additional components or running long dangling cables to one or both ends of the carriage or other moving component. And there are always cons, so in this case you’ll need a stallguard-capable driver (they cost a little more and are only manufactured by Trinamic) and accuracy isn’t great at slow speeds.