Cheap UHF spectrum analyzer (and RC tx rx) using RFM22 module

OK guys sorry I can't keep giving away boards for free. From now on I will charge a small fee (£2 per board) just to cover my costs.

Before you decide to start this project, make sure you can write code for arduino, ideally have some knowledge about SPI communincations, can solder SMD packages, and can find all the components that you need, listed in the BOM pdf attachted in a previous post. I can help, but I don't have time to answer all the questions.