Hans Summers, G0UPL

• Source code for this project
  http://hamradioprojects.com/authors/g0upl/+mm-shield/code

• Using LEDs as varactor diodes
  http://www.hanssummers.com/varicap.html

• Author’s website, containing considerable QRSS-related content
  http://www.hanssummers.com

• Slow-Hellschreiber information
  http://www.hanssummers.com/qrss/qrssqrv2.html

• WSPR
  http://wsprnet.org/drupal/

• Kit of PCB and components for this project
  http://www.hanssummers.com/qrssarduino

• Prototyping Shield
  For this project, a shield with plain matrix of holes is better one with a DIP prototyping area.
  http://www.freetronics.com/products/protoshield-basic
  http://www.sparkfun.com/products/7914
  

License

• The Arduino sketch in this project is distributed under the terms of the MIT License
  http://www.opensource.org/licenses/mit-license.

• The schematics in this project are licensed under the CC-BY-SA 3.0 license:
  http://creativecommons.org/licenses/by-sa/3.0/

http://creativecommons.org/licenses/by-sa/3.0/