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Project Notes

#428 Boldport 3x7 LRThreeDigits Demo

Driving the Boldport 3x7 display from a Cuttle (Arduino) and the LRThreeDigits library.

Build

Here’s a quick demo..

clip

Notes

LuckResistor published the LRThreeDigits library for driving the Boldport 3x7 with an Arduino or compatible.

The LRThreeDigitDemo.ino sketch is just a quick test drive of the library.

Using the Library

The main things to note is that the library:

  • uses Timer2 for display refresh
  • mandates the pin connections per the following table
Arduino Pin Project Pin
GND GND
Pin 2 Digit 1 Sink
Pin 3 Digit 2 Sink
Pin 4 Digit 3 Sink
Pin 5 Segment g
Pin 6 Segment f
Pin 7 Segment e
Pin 8 Segment d
Pin 9 Segment c
Pin 10 Segment b
Pin 11 Segment a

Construction

Breadboard

Schematic

Build

Credits and References

About LEAP#428 BoldportLED 7-SegmentArduino

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

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About LEAP

LEAP is my personal collection of electronics projects - 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.

Projects are often inspired by things found wild on the net, or ideas from the many great electronics podcasts and YouTube channels. Feel free to borrow liberally, and if you spot any issues do let me know or send a pull-request.

NOTE: For a while I included various scale modelling projects here too, but I've now split them off into a new repository: check out LittleModelArt if you are looking for these projects.

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