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Controleo3 Reflow Oven Controller

Controleo3 Reflow Oven Controller

Regular price $149.00 USD
Regular price $149.00 USD Sale price $149.00 USD
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Shipping calculated at checkout.

Have your own oven in need of a controller? This kit has what you’ll need to install Controleo3. It includes the controller, enclosure, thermocouple, SD card for profiles, and more.

Controleo3 will learn the characteristics of your unique oven and fine-tune its PID algorithm to reliably hit temperature targets. Engineers worldwide have used Controleo3 to control toaster ovens, autoclaves, kilns, and more.

Our exclusive profile language helps you write heating profiles for any curve your oven can handle, while the controller’s open-source software gives you flexibility to tune your oven’s behavior to your liking.

Learn more about Controleo3’s learning mode and profile language.

View full details


Step-by-Step Build Guide

Follow our comprehensive guide to build your reflow oven in a weekend. Today’s build guide is the result of a decade of feedback from over five thousand hobbyists and small business owners.

Adaptive Controller That Scores Your Oven

Never built a toaster reflow oven? Controleo3 will score your work and tell you how to improve. It’s as easy as clicking a button.

Controleo3’s revolutionary learning mode will spend thirty minutes testing your oven and fine-tuning its PID algorithm. Then it will give you feedback on what you might want to adjust.

Simple Profiles for Any Heating Curve

It’s an oven, after all. It should be able to follow any heating curve, and it should be easy to tell it what you want. Controleo3’s profile language helps you command your oven with step-by-step instructions.

Controleo3’s profile language features commands to hit temperature targets, control fans, open the door, play a tune, and more. Check out the docs to see how you can modify Controleo3 to your needs.

Bake for a Week

We might’ve gone overboard, but it’s for the best. Controleo3’s bake mode supports high-temperature baking for up to 168 hours. Your reflow oven can remove moisture from sensitive parts, dry 3D printer filament, cure resins, and more.

Open-Source Software

You should be able to decide how your hard-earned reflow oven works. With Controleo3’s open-source software, you can tinker to your heart’s content. We’ve made it available for you on GitHub under the permissive MIT license.

Room for Expansion

Small-scale jobs have ever-changing requirements and your oven is designed to meet them. Controleo3’s accessible microcontroller pin and SPI bus let you network with an ESP32, install shiny new hardware, and do literally anything else you can dream up. Check out the back of the Controleo3 PCB to find the solder pads (they’re labeled).

One-Year Warranty

We know you’ll love your Controleo. But for peace of mind, we offer a one-year warranty on all of our products.



Store up to 28 profiles onboard (1MB flash)

Write over 1000 instructions per profile

Read profiles from full-size SD cards up to 32GB

Controller IO

Built-in servo support

  • This is the largest current draw
  • 2A power supply recommended

5V input voltage (USB or screw terminals)

  • USB port is for software updates/debugging
  • USB port cannot power the buzzer, servo, or relays

Up to six relay outputs

  • Provide up to 22mA per output (outputs 1 - 5 only)
  • Connect using screw terminals or solder pads
  • Connect to solid-state relays (SSRs) or mechanical relay modules

Output 6 is a microcontroller pin

  • Can be used for input or output

Controller Components

Atmel ATSAMD21J18A-AU microcontroller (Arduino Zero)

  • 32-bit ARM Cortex M0+ core at 48 MHz
  • 256 KB Flash memory
  • 32 KB SRAM
  • Custom boot loader (turns relays off during boot)

4" 480 x 320 color touchscreen display

Buzzer - 80db at 10cm

MAX31856 thermocouple IC w/ 0.25C precision & line-voltage filtering

Reverse polarity protection on power terminals

Current protection on relay outputs



Region Service Est. Price
United States Standard (2-5 Days) Free
United States Expedited (1-3 Days) Free
United States Rush (1-2 Days) $51
International *USPS First Class Package (7-21 Days) $22 - $28
International USPS Priority Mail International (6-10 Days) $41 - $67
International USPS Priority Mail Expr. International (1-2 Days) $57 - $80

Shipping rates posted above are estimates. International rates vary depending on destination. Final shipping rates are calculated at checkout.

International customers are responsible for paying any additional duties and taxes. These charges are determined by the customs authorities of the destination country and are beyond our control.

*See our Shipping Policy for more information.

Customer Reviews

Based on 1 review
Small, large, kiln, oven, the Controleo3 is a pretty awesome piece of kit

We purchased the Controleo3 for a number of R&D like projects: it has been a versatile, easy to use, and basically indispensable piece of technology in temperature dependent applications. Aka - melting solder when silk screening and having an exceedingly low cost yet high feature packed controller.

Speaking to Mitchell has also been a pleasure. He's provided deeper insights into the hardware, been personable, and provided technical and customer support that is top notch.

11 out of 5 stars.