Taking a break

 We're taking a break moving shop and hope to be back soon. We hope to start shipping orders in Nov 2018. 

This is a preprogrammed Atmega328P chip, useful if you want to make your own Arduino-compatible or repair a damaged chip on an exisiting Arduino UNO, Duemilanove, Diecimila, or NG!

This chip is programmed with 'ADAboot', my version of the bootloader that is "quick-start" NG/diecimila/duemilanove/UNO-compatible. This means that there is still a 5-second delay from when you press the reset button to when the Arduino runs the sketch but that after you upload a new sketch it will begin immediately. This makes the debugging process much faster!

Be sure to select "DUEMILANOVE with ATMEGA328" in the Arduino IDE

However it means that when Processing (or MaxMSP) opens the serial port, on an auto-reset Arduino there is a 5 second delay until the program starts. Which is why I added a second modification: If the first character sent to the Arduino isn't a '0' (ASCII zero, hex value 0x30) then it will automatically start the App. Bootloading works just fine but if you are talking to the Arduino with other software, just write a character to the Arduino that isnt a zero after opening the serial port to skip the long delay.

Other than that it works just like the 'standard' bootloader, at 57600 baud rate for speedy uploading

It will work in any NG, Diecimila, Duemilanove, UNO and Freeduino/Clone Arduinos as well, and will auto-reset when used with version 009 of the IDE software, or later.

For easy upgrade instructions, see the instructional webpage. You'll need to replace the chip (easy) and download version 13+ of the Arduino IDE

Technical Details


  • 35.5mm x 9mm x 3.33mm
  • 1.3in x 0.36in x 0.13in
  • 2.15g / 0.07oz


Get the most out of your Arduino
How to use the avrdude tool on a Raspberry Pi to program an AVR microchip or Arduino board!

Arduino Bootloader-Programmed Chip (Atmega328P) [123]

  • Brand: Arduino
  • Product Code: ADA-123
  • Reward Points: 8
  • Availability: 2
  • £10.76

  • Ex Tax: £8.97
  • Price in reward points: 100

ATmega328 Chip with Arduino Bootloader

ATmega328 Chip with Arduino Bootloader


ATmega328 Chip with Arduino Bootloader

Qty: 2

SparkFun RedBoard - Programmed with Arduino [DEV12757]

SparkFun RedBoard - Programmed with Arduino [DEV12757]


The SparkFun RedBoard combines the simplicity of the UNO’s Optiboot bootloader, the stability of t ...

Qty: 1