Week 6. Electronics design. I started with trying to install the latest KiCAD onto my computer. It was a no go. Installation to windows didn't work at all, and after I was finally able to install it in Linux, it wouldn't have any component libraries what so ever, nor I was able to add those. So back to Eagle. I downloaded earlier the fab component library for Eagle. It was corrupted with Mercurial having those arrow marks with words "local" and "other" overwriting the XML. It took quite a while to fix this straight into the code. Now, that I looked to file behind the fab library, it seems to be switched. The new one doesn't have for example SMD LED any more. Also using LT-Spice straight from Eagle doesn't work due to the problems in fab.lib components.

I redesigned the hello board with Eagle. I added a LED with a shunt resistor, a button with a capacitor to reduce switching transient and an extra header connected with a way enabling the easy use of custom data transfer using nibbles. Below are schematic, board and the device as well as a screen capture of TeraTerm terminal communicating to the board programmed with fabISP design model "Valentin", which apparently works as well as my own design. The difference being my own design powers the board and Valentin's doesn't.

schema board devboard serialtest