Hi all, For an applied electronics class I'm currently taking, we have to come up with and build an electronics project of our choosing from scratch. I think it would be cool to build some sort of radar device. I have been looking into phased array radars, radar speed detectors, etc., but a lot of it seems to require the purchase of expensive standalone parts. Is there anything I could build in this area that I could make mostly from scratch? Generally, these projects fill up a 9"x9" or so breadboard, just to give a general idea of the scale (although there are no limits). Looking for ideas. Thanks!