Arduino Stand Alone
The following outlines how to build a stand alone Arduino on a bread board. This tutorial is based on the original explanation at the Arduino site. I have not included a schematic here -- if you follow the one at the Arduino site note the listed errors -- they are corrected in the info below.
Note: I am using a resonator with built in caps -- not a crystal. The crystal breadboards more cleanly -- but the oscillator reduces part count (sort of).
- ATMEGA168 chip (blank)
- 16M crystal
- reset button
- 10K resistor
- jumper wires
Let's first look at the full system that we will be making so that you can plan your breadboard. Power is to the left, the micro controller with reset button are in the middle and a 7404 and DB-9 serial connector solution for communication is on the right. Matching wire color isn't necessary -- but keeping your board tidy makes working with this arrangement easier.
On a MAC this serial strategy requires a serial to USB converter -- i.e. a KEYSPAN adaptor. If you want (or need the room), the 7404 and DB-9 can go on a separate board -- just jumper the power and GROUND between the boards and connect the serial RX and TX. You could use an FT232 serial to USB breakout board by Sparkfun and skip the 7404 / DB9 / KeySpan adaptor.
The 10K (brown-black-orange) resistor is needed even if you don't have a switch. It pulls the RESET high and makes sure the micro controller. stays on, even if someone's cell phone rings!
(This Page Last Updated: January 14, 2008ate --> )