Anya Yermakova

HOW TO MAKE (ALMOST) ANYTHING
MIT MEDIA LAB

PROJECT UPDATE - week14

Fabduino - AYduino - part2

Not having fully figured out what the final final project will look like, I decided that I will in any case need another versatile board for trying various input/output/communication combinations, and that it would be nice to add a battery outlet as well as a power LED to my existing AYduino. I added a 5V regulator, an LED light connected (as always, via a resistor) to VCC, and the necessary extra pads and capacitors surrounding the battery connection.

So here we are! Version 2.0.

Download AYduino part2 schematic, board traces, holes, and cut out. Make sure you use a board with copper on only one side of it! (All in a zip file here).

Some pictures

Some pictures:

AYduino v.2 milled, with an accidental "hook". The milling doesn't look so pretty this time, but all traces are functional. Seems to be a product of an old (ie getting-to-be-dull) end mill!

AYduino v.2 stuffed!

AYduino v.2 powered by a 9V battery!

Lessons Learned

First of all, ATmega 328 is NOT the same as ATmega 328P! I still don't quite understand the difference, but I know that 328P works fine with Arduino's avrdude and 328 without the P does not. The part numbers are different and so the code doesn't match.
****READ THIS IF YOU WANT TO USE THIS BOARD DESIGN! Another super useful thing to know about the construction process is that my schematic does NOT work for having the battery and the vcc coming from FTDI (obviously never at the same time, but the traces connected both ways create some serious hot spots around the voltage regulator. The way I dealt with it was by cutting the trace that connected VCC between battery and main board trace, and after programming soldered a piece of wire on there to allow the battery power. Probabaly there exists a better way of doing this, but I don't know what it is yet!