- one 10kOhm resistor
- two 22pF capacitors
- one 100nF capacitor
- one 16.000Mhz quartz oscillator
- the ATMEGA 328P-chip (best with preinstalled bootloader)
- a 5V Voltage-supply and some wiring
- something for programming the chip (existing Arduino-Board or a USB-FTDI-Serial converter)
- one LED and a 150 Ohm resistor (two of both if you want one for the voltage supply as well)
- switch (Reset switch)
- USB-FTDI-Serialchip / Arduinoboard
|minimalistic Ardunio schematic (with optional reset-switch)|
If you like the default LED on PIN 13 on the original Arduinoboard, connect first the LED to Pin 19 (right after AVCC), then the 150 Ohm resistor to the LED and the other end to ground.
If you want to supply your project with for example 9V from a battery you can build a simple voltageregulator like this (not suited for AC-Input!):
If you are using a USB-FTDI-Serialchip (UFSC) connect the DTR/RST-PIN to the RESET-Pin of the Atmega via a 100nF capacitor. RX of the UFSC goes to the TX of the Atmega and the TX of the UFSC goes to the RX-Pin of the Atmega.