SevSegPlus

Display numbers and characters on a 6 digit 7-segment display without additional controller. Tested with 1970s NSA1166 bubble LED display

Improvements

Display now refreshed in the background using timer based interrupts (no need to call in loop)
Added 6 segment display support tested on NSA1166 bubble LED display
Library calls made a little simpler
Some speed optimizations

Limitations

For Arduino Due, Zero or MKR only
Use of TC4_Handler may clash with other libraries (e.g. LCD matrix drivers)

Example use

#include "SevSegPlus.h"

SevSegPlus ledDisplay; 

void setup()
{
  ledDisplay.begin(); 
}

void loop()
{
  ledDisplay.print("  Hi  "); 
  delay(1000);

  ledDisplay.print("There ");
  delay(1000);
}

Hardware

These instructions are for the 6 digit NSA1166 LED 'bubble' display https://www.jameco.com/Jameco/Products/ProdDS/2210976NAT.pdf

NSA1166 with male headers
inserted into breadboard
220 ohm resistors in series with the 6x cathodes 'digit'
hooked up to Arduino MKR 1010 with jumper wires (see table below) Pinout from Arduino to NSA1166 display

Use a 220ohm limiting resistor in series for each of these cathode lines

	Arduino	NSA1166
digit1	0	Pin 6
digit2	1	Pin 8
digit3	2	Pin 10
digit4	3	Pin 12
digit5	4	Pin 14
digit6	5	Pin 16

The segment pins are hooked directly to the Arduino

	Arduino	NSA1166
segA	6	Pin 7
segB	7	Pin 15
segC	8	Pin 3
segD	9	Pin 11
segE	10	Pin 9
segF	11	Pin 17
segG	12	Pin 13
segDP	13	Pin 5

Credits

Based on: https://github.com/sparkfun/SevSeg

Original Library: http://arduino.cc/playground/Main/SevenSegmentLibrary