Square wave generator

I learned that A6 and A7 cannot be used as digital IO (stands in the datasheet of the mega328, wow didn't see that..). So had to adjust the schematic. 

The rest seems to work from POV hardware, so just a little bit of firmware needed and this little mini project is ready for the next step.

Also created a repository on github to handle the versions of the files (schematic and firmware). 

So turning off the soldering station. LCD works, so i am starting to write the firmware for this puppy. 

so made a rough schematic. Begin soldering... 

Also inspect some parts:

Lets go!