Wouldn't it be nice if there would a series on Quadcopter since most of the parts or devices like the transmitters,receiver are very costly and adds up the total cost of making it.
Atleast there should be a series on building all the parts Transmitter ,Received from scratch using arduino or raspberry pi.
Or Hacking cheap RC toys to build a Quadcopter
Or building cheapest Quadcopter
I think that would be a hit on YouTube!