This is another breadboard compatible header board, that I am working on. This one is for all 28-pin AVR devices, ATmega48, ATmega88, ATmega168 and the latest ATmega328. Component count is low and there is no voltage regulator on board. That makes it easy to power it from various sources.
As a bonus, this board is a hybrid of through hole and SMT components. It has two SMD LEDs under the hood. Great to learn how to solder surface mounted devices.
It has also an FTDI-connector and runs with a 16 MHz resonator, which makes it Arduino compatible. The jumper is used to select between different power sources.
Yikes, SMD soldering. This is my first attempt at hand soldering 1206 SMT components. 1206 is only 3.2 mm × 1.6 mm! But these are about the largest SMT components available. Most commonly used are way smaller, 0805, 0603 or 0402. My soldering still looks ugly, but with a bit of practice I think I can do much better.
The space on the board is a bit limitted, so there is no room to mark all pins. That’s why I have a little cheat sheet around, while wiring things up.
10 responses so far ↓
1 Tod E. Kurt // May 23, 2009 at 17:02
This is great. I wonder if you could make a tiny pinout cheatsheet sticker that goes on top of the mega328?
2 Alex // May 23, 2009 at 17:35
Yeah, that would be cool. But I think, you would have to decide which you want, Arduino or ATmega pin naming.
3 Tex // May 23, 2009 at 18:27
When can we buy?
4 Alex // May 23, 2009 at 18:50
There was still a small bug in the PCB. So another proto run. I think maybe around end of next month.
5 Tod E. Kurt // May 24, 2009 at 05:54
Here’s my attempt at an Arduino sticker that could be used with the above:
http://todbot.com/blog/2009/05/23/arduino-chip-sticker-label/
6 Ed Davies // May 24, 2009 at 13:44
The LEDs are under the processor? Do you look at them through the gaps between the pins?
7 Alex // May 24, 2009 at 19:01
Yes, they are. They shine thru the pins.
8 Stefan* // May 30, 2009 at 19:33
Don’t know, what you meen. Soldering loos very nice. You are not a robot
9 Jummington // Jun 6, 2009 at 20:09
You should post your cheat sheets, I know I for one would find it very helpful.
10 Num Nim // Dec 2, 2009 at 05:04
Nice work!
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