The problem is, there is no data sheet. Wanting to use this chip, [David] turned to sandpaper to figure out the pinout of this chip. The best example of a product that came with this chip is a ...
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Sandpaper Grit Chart
It’s hard to think of a home improvement project that doesn’t involve sandpaper. Woodworkers use it to smooth and shape wood. Painters and refinishers need it to remove old finishes and polish ...