Make: Volume 82

vinyl that covers the current driving PCB or the

screw holes in the case. Place the next case layer,

which has the open slot in its handle, on top of

the vinyl, then place the final, solid-handled layer

on top of that one. Secure the three case layers

together with five M3×12mm screws and nuts.

The transmitting coil’s power wires will extend

from the end of the case’s handle (Figure

Q

).

When the case is completed, strip the ends of

the red and black power wires if necessary and

screw them into the corresponding +/– terminals

in the screw-terminal-block-to-barrel-jack

adapter. Check carefully to be sure the wiring

polarity is correct. Then insert ...