deletions | additions       diff --git a/Stepper motors driver.tex b/Stepper motors driver.tex  index ed3b303..7d442f8 100644  --- a/Stepper motors driver.tex  +++ b/Stepper motors driver.tex 
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\subsubsection{Stepper Motors Driver Circuit} Each of the two stepper motors has a ULC2003A IC transistor array to amplify the sequence signal from the PIC and provide the stepper coils with current \cite{TexasInstruments:2013}. The input for the two ICs is joined because like the servo motors, both steppers operate at the same time, in the same direction, and therefore receive the same signal from the PIC simultaneously. The four inputs connect to the signal hub for communication with the PIC. A ground reference for the PIC is connected to the stepper driver board. The stepper driver board is powered by 5V at 2A. The four outputs from each IC connect to one unipolar stepper motor. Each unipolar stepper motor has two power leads connected to the same 5V that powers the driver board \cite{GETechwiki:2008}.The stepper driver circuit can be seen in figure #. (!!!!!!)