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#* A small piece of craft foam will likely need to be inserted into the middle of the device to provide stiffness, to separate the two layers, and to act as a spring to keep the user pushbuttons open when they are not depressed
#* These circuits could be inkjet printed at the college, or a traditional copper flex circuit production run could be ordered
#* The outside ("back") of the flex circuit could be printed with the pushbutton labels and other information, or these could be added in the form of a sticker.
# A connection scheme to attach the coin cell and ESP12F to the flex circuit
#* Z-axix electrically conductive adhesive transfer tape (3M type 9703) is one option, though the ESP12F circuit pads may be too small to permit reliable operation and sufficient current flow (approx. 1.5mm2, where the 3M documentation recommends 3.5mm2)