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The Explorer 8 supports a five
volt LCD and an octet of LEDs.
We’ll want to use them, so we’ll
jumper the Explorer 8 to supply
power to the display elements. To
enable the LCD, we populate J61
I’ve included a graphical
depiction of the Explorer 8 LCD
subsystem in Schematic 2. The
Explorer 8’s LED banks are
controlled via the D-Stick’s I/O
ports B and D. Jumpers J21 and J7
(element 6 in Figure 1) provide a
path to ground for each respective
LED bank. The LED banks are laid
out in Schematic 3.
Schematic 4 represents the 40-
pin socket that is hosting our PIC18
D-Stick. Note that the voltage pins
ADVANCED TECHNIQUES FOR DESIGN ENGINEERS
November 2017 53
■ SCHEMATIC 1. Nothing here
that you haven’t seen before.
We’ve simply disconnected the
voltage regulator outputs by
removing the jumpers.
■ FIGURE 1. The purpose of
each jumper is more easily
identified if you reference the
Explorer 8 schematic. There is
also a jumper chart in the
Explorer 8 User Guide, which
is a free download from the
■ SCHEMATIC 2. Again, nothing new
here. This is a standard LCD setup.