Using a ULN2803A to control a DC motor

This post explains how to use the ULN2803A IC to control a DC motor, using an Arduino board.

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Voltage sources and resistors

When developing for embedded systems, having knowledge about electronics gives much more freedom on what we can create. Instead of using only shields or demonstration boards, we can develop custom solutions for our needs, allowing for a greater efficiency and a lower cost.

This post explains some very basic principles about electronics, namely DC voltage sources and resistors. I’ll try to make some posts about more basic electronics every once in a while, in order to complement the other posts about embedded systems.

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