He got the board up and running, and even made his own custom helical coil antenna. The case was 3D printed out of PLA. It’s a tiered cylindrical bobber. The wider top section floats on the ...

The self-resonant bit is implemented by using a small antenna nearby the coil to pick up the EM field, and by suitably clamping and squaring it up, it is fed back into the gate driver to close the ...