Make the Ultimate Bluetooth Dry Ice Fog Machine

Build your own Arduino driven, Bluetooth remote-controlled dry ice effect machine with integrated LED lighting. Perfect for parties, effects, and Halloween.

Chillistick.com kindly supplied the dry ice for this project. Use the voucher code 'DIY10' to get 10% off all their Halloween products for a limited time.

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

Elegoo Arduino Nano (x1): https://geni.us/ArduinoNanoV3
L298N Motor Driver (x1): https://geni.us/L298N
8 AA Battery Holder (x1): https://geni.us/8aaBatteryHolder
AA Batteries (x8): https://geni.us/AABatteries
Mini breadboard (x1): https://geni.us/MiniBreadboard
12v Geared DC Motor (x1): https://geni.us/12VGearedDCMotor
HM10 Bluetooth Module (x1): https://geni.us/HM10Bluetooth
Contact Switches (x2): https://geni.us/ContactSwitch
Stationery Holder (x1): https://geni.us/StationeryHolder
Nuts and Bolts - : http://geni.us/NutsAndBolts
Wire: https://geni.us/22AWGWire
PLA Filament: https://geni.us/PLAFilament
Plastic Container (x1): https://geni.us/PlasticContainer

These are some of my favourite tools I use and can recommend:

Battery-powered glue gun: http://geni.us/BoschBatteryGlueGun
Bosch Bit Driver: https://geni.us/Bosch-Screwdriver

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

3D printed parts can be downloaded from here: https://www.thingiverse.com/thing:3902329

< Older Post

Newer Post >

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.