HEAT

🎥 Full build video on YouTube:
👉 LINK

HEAT is a compact, budget-friendly DIY hot reflow plate designed for SMD soldering.
It’s built with easily available components, a simple PCB, and 3D-printed parts, focusing on reliability, safety, and repeatability rather than overkill complexity.

The project is centered around a PTC heater, solid-state switching, and a microcontroller-based temperature controller.
Instead of a full PID loop, HEAT uses a windowed / staged temperature control approach, which is simpler, predictable, and well-suited for small reflow plates.

Key goals of the project

• Make SMD reflow soldering accessible and affordable
• Keep the electronics understandable and hackable
• Be reliable enough for daily prototyping use
• Look clean and compact on the workbench

Features

• Compact desktop hot reflow plate
• PTC heater (self-limiting, safer than nichrome)
• Solid-state relay for silent AC switching
• Microcontroller-based temperature control
• NTC thermistor feedback
• OLED display for live temperature and status
• Simple UI
• Designed for 220 V AC (EU-friendly)

What’s included here

• STL files for:
  • Enclosure
• STEP files for easy modification

What’s on GitHub / Instructables

GitHub: LINK
Instructables: LINK

Includes:

• Full step-by-step build guide
• Firmware source and binaries
• BOM with direct part links
• Safety notes and limitations

This build is ideal if you:

• Do SMD soldering at home
• Prefer understanding your tools instead of buying black boxes
• Enjoy DIY electronics and firmware tinkering
• Need a compact, bench-friendly reflow solution