3D Printed Low Cost Robotic Bartender

Build yourself a low-cost easy to assemble Bluetooth controllable robotic bartender using an Arduino Uno. This easy Arduino based project can be 3D printed and is a cool Arduino project for beginners.

Links to 3D printable models, code and BOM are below the videos.

First drink CSV:

07,30,01,68,90,01,72,10,00,70,00,00,74,01,00,71,01,00,

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

Arduino Uno: http://geni.us/ArduinoUno
Motor driver: http://geni.us/UnoMotorShield
Contact Switch: http://geni.us/ContactSwitch
Linear Bearings: http://geni.us/LinearBearings
RGB LED: https://geni.us/RGBLEDCC
8mm Steel Rod: https://geni.us/8mmMetalRod
Stepper Motor: http://geni.us/StepperMotor
Timing Belt and Pulley (2m version): http://geni.us/TimingBelt
Timing Belt and Pulley (5m version): http://geni.us/TimingBelt5m

Download 3D printable parts:

https://www.thingiverse.com/thing:2478890

Code for the project:

https://github.com/DIY-Machines/BarRobot

Wiring Diagram

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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.