explain board errors and fixes
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version 1 (2019-11-17):
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version 1 (2019-11-17):
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- first finished schenatic and layout
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- first finished schematic and layout
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- prototype board ordered
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- prototype board ordered
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- the button footprint is wrong. to fix it, cut the top left lead to break the connection to ground, and solder on of the bottom lead to the surrounding ground.
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- in the schematic I switched SDA and SCL to the I²C LCD backpack. to fix it, I soldered two coated wires through the pin holes of the backpack and crossed soldered them.
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