<<< In the Name of God >>> My name is Amirreza Pourkashef. A M I R E - X - Today I Proud to Present The AirCraft Alert(Simple Radar) When an airplane flying close you,This circut Warninging. an Operational Amplifier (Op-Amp) amplification the Signal (From Antenna) It have a simple Antenna with a few wires (Signal Range is Between Standard Ranges in the World and You can Change it) I'm Sorry My English is not Good. Good Luck BMP(picture) + DSN(schematic) + LYT(PCB layer) => a ZIP file AirCraft.zip