User’s Manual
Page 3
5.0
SPECIFICATIONS
5.1 Power Requirements
It requires a 5VDC @ 500 milliamps power supply to operate. This power can be taken
from the computer’s power supply or USB port. Consider using the A3 – USB Power
Cable found under Accessories in the website.
WARNING
Check the polarity and voltage of the external power source and connect the 5VDC and
GND. Overvoltage or reverse-polarity power applied to these terminals can cause
damage to the board, and/or the power source.
6.0
SELECTION JUMPER
6.1 Input (PULL-UP or PULL-DOWN)
Pins 10,11,12,13 and 15 can be set to pull-up or pull-down by selecting the jumper in the
appropriate position.
a. If a pin is pulled down, then it needs a high to make it change states.
b. If a pin is pulled up, then it is a ground what will make it change states.
1-2: PULL-DOWN 2-3: PULL-UP
