The chip mounts to the circuit board by a technique called “Chip on Board,” a mounting technique often found in inexpensive consumer electronics. It is hidden under a little black bulge that is actually a protective epoxy coating. ![]() There is a single IC controlling the LEDs. When you slice open one of these balls, you find the electronics sit in a clear plastic egg-shell-like enclosure that pops apart when the rubbery outer ball is cut away. Bottom, and LED ball lit up in all its glory. Top, a version of the ball containing a noise maker with the speaker port visible. If you’ve ever attended a trade show, you might have seen a booth give-away item that consisted of a see-through bouncing ball with a flashing LED or two inside and sometimes a noise maker. We cut one of these balls apart so you needn’t destroy yours to get a look at its internals.
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