Adafruit 4 Digit 7 segment (clock) displays
Eagle CAD files for the excellent Adafruit 0.56" 4 Digit Display's
I absolutely LOVE the Adafruit 4 Digit 7 segment (clock) displays... They come in different colors and are Common CATHODE so you can use them with the Maxim 7219 / 7221 chips
I use them a lot so I made a PCB for the display's, check it out...
The wonderful Maxim 7219/7221 chip is what I use to control the 7 segment displays, so the Ledcontrol library is added. TIP: At the www.reichelt.de webshop, Europeans can buy Maxim chips very cheap so the price can't be the obstacle to use the Maxim chips ;)
BTW: I do NOT get money from Adafruit or Reichelt, I simply want to share this info so others can benefit from the many, many hours I invested in making this PCB.
Ledcontrol info: http://playground.arduino.cc/Main/LedControl
Maxim chip info: http://playground.arduino.cc/Main/MAX72XXHardware
Visit my Arduino playground: https://www.flickr.com/photos/edr1924/sets/
These files are free; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.
This PCB/schematic is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
USE MY PCB DESIGNS AT YOUR OWN RISK, I TESTED THE V1.0 BOARDS BUT NOT THE 1.1 REVISIONS although not many changes were made
Erik de Ruiter 2015-02