The Wise Clock 4 board was designed to be plugged directly into the 3mm 32x16 LED display from Sure Electronics. I am often asked how it would connect to the 5mm 32x16 LED display. The photos below will give the answer to this question. First, the 2x8-pin female header provided with the kit needs to be replaced with a 2x8-pin male header (or two 8-pin male headers side-by-side). Place the header on the top side, as shown in the picture above. Ideally, a "shrouded 2x8-pin header" (like this ) should be used here, since that will also force the ribbon cable connector to be inserted with the right orientation (notice that the peg is closer the FTDI connector). Then connect the board to the display using the ribbon cable (coming with the display), as shown in the next photo, and very importantly , paying attention to the orientation of the connector. In case you wanted to chain a second display, just connect, with a second ribbon cable, the OUT connector of the first with