Minimal Arduino

1 Scope

This little project goes back to a phone call a couple of years ago, where my phone partner told me that he was interested in programming bare bone Atmel 328 ICs. I thought, well this is kind of interesting, because the Arduino platform is quite nice, but there are times where I wanted to have such a little logic platform alone without the need to have a standard Arduino PCB.

So I got myself a couple of Arduino ICs from Sparkfun.

It took me a long time until I had the opportunity and spare time to try them, but now I did and here are my insights!

2 Components

• SparkFun ATmega328 with Arduino Optiboot (Uno) https://www.sparkfun.com/products/10524

Note that you can also get this IC from Reichelt: https://www.reichelt.de/arduino-atmega328-mit-arduino-bootloader-ard-atmega-328-p230602.html

• three Tantal capacitors 100nF
• A crystal 16,0000 MHz
• two capacitors 22pF
• A breadboard and a set of bridges
• a 10K resistor and a pushbutton switch
• a 470 Ohm resistor and a red LED

Here is the datasheet of the Atmel 328P: https://cdn.sparkfun.com/assets/1/1/9/c/b/Atmel-42735-8-bit-AVR-Microcontroller-ATmega328-328P_Datasheet.pdf

3 Setup

I followed this instruction here: https://www.kriwanek.de/index.php/de/arduino/boards/410-minimal-arduino-f%C3%BCrs-breadboard

I am taking the circuit from Kriwanek's web page: