RF Link Receiver
de0 nano
http://www.coe.montana.edu/ee/seniordesign/archive/FL11/ESIBalloon2/design-2.html
the transmitter the is connected to the de0nano
and also a weight sensor that is also connected to the de0nano
http://www.aliexpress.com/item/For-Arduino-Force-Sensitive-Resistor-0-5-Depending-On-How-Much-Pressure-is-being-applied/671861984.html
also in the attached file the schemes for all of it
Document (7).pdf (12 KB)