This time I went about building my own low cost Arduino clone. To make sure that my design was consistent with arduino boards, I used Sparkfuns RedBoard design as a reference.
At first I wanted to attempt a single layer layout. As you can see, I ended up using lots of jumpers 😦 Also, I customized the board to use SOT223 packages for the voltage regulators (bottom layer). I had to use male header pins for the IO’s as my component stash was void of female headers.
Downloads: Eagle Schematic and Layout
The board makes use of an atmega328 with an UNO bootloader. You can either purchase a bootloaded chip or load the bootloader using a programmer. Here’s a list of sites that sell a pre-bootloaded Atmega328: Continue reading