Controleo3 Reflow Oven Controller

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.

Profiles

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

• Kit Parts List (see “Controller”)
• Troubleshooting & Learning Guide
• Profiles Language Docs
• Controleo3 GitHub
• Firmware Update Guide

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