Project Summary

iHeater is a compact and affordable solution for 3D printers without an active heated chamber or with limited motherboard connectivity. It’s especially useful for printers with proprietary boards that don’t have extra ports for fans, heaters, or thermistors. iHeater solves this problem in a simple and universal way.

There are currently two versions available:

• 100W for small and medium printers
• 200W for larger enclosures

iHeater can operate as a standalone device with its own firmware or be integrated into Klipper as a secondary MCU over USB.

Key Features

• Heats the printer chamber up to 60–70°C depending on the version
• Powered directly from 220V — doesn’t overload the printer’s PSU
• Works with Klipper as an independent MCU (e.g., STM32F042)
• Optional standalone firmware with physical button control
• Compact, safe, and easily integrated into any enclosure

Use Cases

With Klipper

iHeater runs as a standalone MCU managed by Klipper. It controls the heater and fan independently, offloading this task from the mainboard and PSU. Perfect for printers that need extra thermal control without firmware hacks or PSU upgrades.

Standalone Mode

With custom firmware, iHeater functions as a self-contained controller. The target temperature is set by pressing the MODE button, with the value indicated via three LEDs. Step size and behavior can be customized in the firmware.

Why It Matters

Maintaining a heated chamber improves print quality and makes it easier to print materials like ABS, PC, or Nylon. Many printers don’t include active chamber heating — iHeater makes it possible to add this feature with minimal effort.

What You Need to Build It

• 3D-printable case or integration into your enclosure
• Basic tools for wiring and assembly
• All parts listed below are easy to source and simple to work with

Component List

Advantages

• Affordable: Board cost is comparable or lower than DIY solutions with SSRs and MCUs
• Universal: Works with any 3D printer setup
• Easy to Assemble: All components are large and beginner-friendly
• Open Hardware: Full documentation and firmware available

Resources and Links

• Documentation: [https://docs.idryer.org/iHeater/](https://docs.idryer.org/iHeater/README_ru/)
• Discord: Join our development and support chat
• YouTube: Watch setup and usage videos
• Telegram: Connect with users and developers
• Facebook: Follow us for updates and tips

Start building your iHeater today and upgrade your printing experience!