Before you order, please read the whole description, the price will change based on selected option:

• PCB - $1
• PCB + components - $10
• PCB + assembled components + un-soldered pin terminals - 20$

In case of assembly, you pay for my time assembling and testing the final product. If you like to solder/learn to solder then KIT is for you, if you want to use it, then fully assembled unit is for you.

Each board is hand-assembled, no pick and place, this is why it is not so cheap.

What is it?

Bare PCB/kit/fully assembled board (check options on the right) for Atmega2560 with Arduino mega compatible pinout plus 16more exposed pins. For USB to serial conversion, CP2102 chip is used this is required if you want to use upload over USB (with bootloader). If you plan using ICSP, then this chip does not have to be soldered.

Board has 16 more pins compared to classic Arduino mega2560, for using these pins you have to use this page in arduino. Check this page for the installation how-to.

Only for 1.0 version (one with sticker): If you like to use pins in order as shown on pictures (one with sticker) you have to use my fork of MCUdude/MegaCore. After installation of MegaCore select ATmega2560 in board menu (Tools->Board->ATmega2560), then select pinout "Arduino MEGA pinout with all pins v1" in menu Tools->Pinout. If you do not mind that pins are not in order, you can use "stock" MegaCore from McuDude. For pinout, in this case, check this picture.

Over sixteen more IO, you get:

• two more HW interrupts (INT6 (pin 72, INT7 pin 73)
• five more pin change interrupts (PCINT15-11, pins 75 - 79)
• two exposed timer input capture (ICP1 pin 82, ICP3 pin 73 - shared with INT7)

Why did you make it?

I was in need for a drop-in replacement for Arduino nano with more functionality (pins, UARTs, I2C...), so I made a few boards for a few different/updated chips and while I was playing with this I designed more than what I needed (I mostly use breadboard compatible version). I designed this set of boards:

• Atmega328P/PA/PB board compatible with Arduino nano
• Atmega328P/PA/PB board compatible with Arduino Uno
• Atmega324P/PA/PB board compatible with Arduino nano
• Atmega324P/PA board compatible with Arduino mega (PB version not produced yet, only designed, check GitHub)
• Atmega2560 board compatible with Arduino mega with all pins routed to pin headers

What makes it special?

• shield compatibility is not affected
• all pins of mega2560 are exposed
• better usb to serial chip (CP2102) then on chines clones
• still open source