#Morseapperat This is a simple morse tranciver, able to communicate over short (~100m) distances that you can build yourself.
The legality of this relies on a technicality: the actual radio is not what you build, it is just an activator for it.
##Technically This is just a simple astable multivibrator (jfgi) that will activate the transmitter, and allow the receiver to operate when it is not active.
The transciever set this is built up over is found at: http://www.dx.com/p/433mhz-rf-transmitter-receiver-link-kit-green-221225#.VWtIbeQxWny it is usually used for arduinos or the like.
The whole project is released under CERN Open Hardware 1.2 License