bbAir is a small desktop device that is able to display simple graphics, like alphanumeric characters and emojis, as air bubbles. Those air bubbles start at the base of the device and then float to the top, like the pixels on a scrolling LED matrix display turned on its side. It has 19 columns and that limits the “resolution” in the X axis. The Y axis resolution isn’t so easy to calculate, because it is a factor of the bubble size and how quickly the device can make bubbles. If the bubbles are too close together, they’ll join together and will fail to act as distinct “pixels.”
Dave5 
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