Descripción

You receive the GERBER files for the board and information for everything you need to make your own portable soldering iron based on Arduino. This will give you a working final product but is recommended to be used for testing and learning. 

• Version: 3.3
• Certificate: Non-Commercial Use
• Control: PID with feedback
• Max temperature: 480ºC
• Compatible with: T12 iron tip (any shape)
• PCB size: 100 x 15mm
• Voltage: 12.6V – 21V (3S to 4S)
• Recommended voltage: 5S battery 21V
• Power: 45W
• Auto sleep mode: Yes
• Vibration sensor: Yes
• Buzzer: Yes

I’ve been working on this board for more than a year and made a few versions and tests till the PCB worked without problems. The idea of this project is to have the board and the components and following my videos and guides, mount your own soldering iron. By that you will learn all the processes from schematic to layout to PCB manufacture, then soldering SMD and through hole components, bootloader burn, Arduino coding, PID, temperature control and much more.  The main goal of this project is to give the oportunity to other DIYers to practice at the same time they watch my YouTube tutorials with this board.

*Once you make the order, go to your account -> orders, select the order and then click the Download link on the right side and the file will be downloaded. 

You receive

• 1 x GERBER files for PCB V3.3
• 1 x STL files for 3D case
• 1 x Arduino code V3.3
• 1 x part list for all components (with eBay links)
• 1 x schematic
• 1 x short manual (guide)
• 1 x Full tutorial website
• YouTube video link for tutorial

What’s on the PCB?

On the PCB we have the next components:

• One ATMEGA328p-AU microcontroller chip
• Vibration sensor
• Buck converter circuit
• 2 side push buttons
• Thermocouple amplification OPAMP
• Notification LEDs
• Power MOSFET
• OLED display 128 x 32 pixels
• Metal clips for soldering iton tip
• Notification buzzer
• UART and SPI pads for bootlaoder burn and programming
• DC plug input

Demonstration video

Temperature read

To read the temperature we use an amplifier. The thermocouple is in series with the heater so we have to connect the negative and positive pins to an OPAMP, amplifiy the voltage drop over the thermocouple and then graph the output and obtain the temperature.

Power control

The temperature is controlled by a PID system. This will create a PWM signal. This signal will be applied to a BJY that is used as a driver for the p-MOSFET. The mosfet will control the power applied to the iron tip and by that the temperature. Each loop there is a small power-off so we could read the thermocouple voltage drop.

3D printed case

This project has a 3D printed case that I’ve designed and that you could print with PLA of any colour or transparent. Don’t worry, after hours of testing, the base part of the iron tip was not hot enough to melt the plastic. I could easily touch the base of the iron tip with my hand, only the tip is getting hot.