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arduinouno: add schema to at28wr recipe

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Virgil Dupras 2020-08-21 20:25:06 -04:00
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recipes/arduinouno/at28.md
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@ -14,7 +14,7 @@ to be driven from an Arduino Uno.
## Schema
(there will soon be an image here, but I have yet to scan my schema)
![Schema](at28wr.jpg)
This is a rather simple circuit which uses 2 chained '164 shift register to
drive the AT28 address pins and connects CE, WE, OE and the data pins directly

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