Amateur radio is the ultimate hacker ... help produce the intended results. Individual circuits are described in the handbooks; the real design work is to combine them into a complete functioning ...

Using a diode as a detector, the design generally uses less than 10 ... right pads on the credit card to the rest of a crystal radio circuit, and you’re all set. Of course, [Billy] goes the ...

A design of voltage doubler circuit has been studied in context of electromagnetic ... Dickson voltage multiplier for radio frequency (RF) energy harvesting, shown in Fig.1-a, is simple and has an ...