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Project Notes

#366 Nokia 5110 LCD/AdafruitSoftwareSPI

A quick Nokia 5110 LCD test using software SPI and the Adafruit PCD8544 library.



I’ve been having SPI conflicts with other libraries I’ve used for controlling the Nokia 5110 LCD, so time to pull out the big guns - the wonderful Adafruit library set which includes a PCD8544 module.

5110 LCD SPI Configuration

This is a test of the software SPI configuration, which means we steer clear of the hardware SPI pins (10-13 on an Arduino Uno).

Here’s the mapping from the terminology used by my particular 5110 module and pins on an Arduino Uno.

Pin Usage Arduino Uno Pin
RST reset 7
CE/SCE/SS chip enable 6
DC/CSN data/command select 5
DIN data in 8 SPI MOSI
CLK clock 9 SPI SCK
VCC power 5V
BL Backlight on when GND n/c
GND Ground GND





Credits and References

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This page is a web-friendly rendering of my project notes shared in the LEAP GitHub repository.

LEAP is just my personal collection of projects. Two main themes have emerged in recent years, sometimes combined:

  • electronics - usually involving an Arduino or other microprocessor in one way or another. Some are full-blown projects, while many are trivial breadboard experiments, intended to learn and explore something interesting
  • scale modelling - I caught the bug after deciding to build a Harrier during covid to demonstrate an electronic jet engine simulation. Let the fun begin..
To be honest, I haven't quite figured out if these two interests belong in the same GitHub repo or not. But for now - they are all here!

Projects are often inspired by things found wild on the net, or ideas from the many great electronics and scale modelling podcasts and YouTube channels. Feel free to borrow liberally, and if you spot any issues do let me know (or send a PR!). See the individual projects for credits where due.