3.2.13 How to use 8-channels high
current driver
On NX-4i board provides the special tool for
experiment about high current driver such as
stepper motor driver. It has 8-channels of high
current open collector driver. The heart of this
circuit is ULN2803 driver-IC.
Experimenters can connect digital signal
to input of ULN2803 directly. At output, it has
terminal block for connectting high current load
such as +12V uni-polar stepper motor. At output
terminal block has 8 of ULN2803’s output and +V.
Sample stepper motor connection circuit for
experiment see below.