Bottom pinout (connector B1)
This layout exists solely to make things complicated! Note that the pins 1 - 14 run right-to-left
but pins 15 and 16 are on the right end. Additionally, pins 15 and 16 may be reversed!
NOTE: Some modules with a bottom connector will need to use the T1 pinout! Check your
module.
There is no easy way to describe how to configure this! Refer to the following figure and the
pinout for your particular module.
J2 configures the
last
pin on the left
J3 configures the 2
nd
pin from the end
If your module outputs a negative voltage on pin 15: REMOVE both shunts and wire the “A” and
“K” terminals, (on the right end of your module), using external wire.
If your modules does NOT generate a negative voltage on pin 15, then install the shunt between
A and pin 15 for your module. Install a shunt between the center pin and “K” on the other
jumper.
If your backlight doesn’t work after hooking this up, you probably have it backwards. The good
news is that it probably didn’t hurt anything; try again.
Bottom pinout (connector B2)
This pinout is used on smaller 12 x 2 modules and
requires a connector with a 0.05" pitch. There shouldn’t
be any negative voltage present; install a shunt on J1.
If it does output a negative voltage on any pin, you MUST remove J1 and wire A and K terminals
to the Header labeled “A” and “K” using external wires.
