I'm currently preparing for a little soldering-workshop with an Arduino-Board for soundgeneration. Because it would be too expensive for the attendees to buy a complete Arduino, I decided to build my first own PCB and give it to a productionline.
Inspired by the work of several people I made my first Eagle Board and tried my best to have a board with the following attributes:
– All Power-Pins (8x) and all Output-/Input-Pins (27) fit for Breadboards (if needed)
– Minimal Arduino-Clone-Board with 16 MHz Crystal and Reset-Switch
– Mounting holes (bit small but still there)
– Smal dimension
– No FTDI (cheaper and not used for that Project)
– Two layers PCB
– Silkscreen on the front and back
Parts to Build the Board
1x ATMega 168P or ATMega 328P-PU
1x 16 MHz crystal (speed up the ATMega)
1x Voltage regulator 5V (volatage regulation)
1x 10uF capacitor (volatage regulation)
1x 0.1uF capacitor (volatage regulation)
1x 10k ohm resistor (reset-pin) ---> or is it better to have a 1k ohm resistor here
2x 22pF capacitors (crystal)
– Switch (reset)
– 28pin socket adaptor (swap ATMega)
– Header-Pins (swap cables)
Later I might design a "shield" with some LEDs and an FTDI on it. Do you see any problems with the current Design to add that later?
My design is based on the following Boards
– Boarduino (http://www.ladyada.net/make/boarduino/
– Gorduino (http://thetransistor.com/projects/gorduino/
– Project Board (http://www.kickstarter.com/projects/610437050/arduino-project-board
My Board is also under CC-BY-SA (as marked on the board).
I kindly ask everyone to have a look at my board and check the files to see if I did a mistake. I hope I will get some inputs to publish a board witch is not only useful for me.
Thaks a lot!