Tymm writes -
Arduino boards are great for prototyping. However they get rather expensive when you have multiple concurrent projects or need lots of controller boards for a larger project. There are some great, cheaper alternatives (Boarduino, Freeduino) but the costs still add up when you need many of them.
This is a way, after about $25-$30 initial investment, to build sub-$10 Arduino-compatible boards with very little extra time investment on each.
Note that the basic idea here (Arduino on a breadboard) has been done for quite some time (e.g ITP Arduino Breadboard instructions); however the cable adapter build & usage instructions here help absolutely minimize the parts count for each core.
This project requires knowledge of soldering and basic electronics, and you should have at least some experience already with Arduino development. I don’t suggest this as a first electronics project.
note: I pronounce uDuino “moo DWEE noh”
This Instructable is still a little under development; if you notice anything missing or have suggestions for things that should be added please let me know. I’ve left off some notes about potential uses/tweaks to keep the build relatively simple (I might put together another Instructable at some point based on some of the programming & testing tools I’ve been working on with this setup).
uDuino: A very low cost Arduino compatible development board – Link.