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@@ -7,11 +7,12 @@
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- and SPI e-paper boards from Waveshare
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### important note :
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-- these displays are for 3.3V supply and 3.3V data lines
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+- the display panels are for 3.3V supply and 3.3V data lines
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- never connect data lines directly to 5V Arduino data pins, use e.g. 4k7/10k resistor divider
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- series resistor only is not enough for reliable operation (back-feed effect through protection diodes)
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- 4k7/10k resistor divider may not work with flat cable extensions or Waveshare 4.2 board, use level converter then
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- do not forget to connect GND
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+- the actual Waveshare display boards now have level converters and series regulator, safe for 5V
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### Paged Drawing, Picture Loop
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- This library uses paged drawing to limit RAM use and cope with missing single pixel update support
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ZinggJM