Beginner at coding trying to make a timer with the RedBoard Turbo and Qwiic Alphanumeric Display

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1

so I have tried a lot of examples and other code I have found online but nothing is remotely working with this set up and I need somewhere to start so I can build a timer with 2 Alphanumeric displays and a 3 way toggle switch. any help would be appreciated

2

without more information about what you want to do, I do not think we can help or point to some useful examples. Think about following question (but not limited to)

What is the project you want to build about?

why 2 Alphanumeric displays ? What do they need to show? when ?c

Why a 3 way toggle switch ? What should happen if toggled? Do you know which 3-way switch?

3

There likely won’t be a ready-made example, but you can probably get it done step-wise.

Try doing the default blink sketch first https://learn.sparkfun.com/tutorials/re … mple-blink then move on to getting a single alphanumeric working https://learn.sparkfun.com/tutorials/sp … no-library

…and then add in the switch and 2nd unit.

4

The timer is for Airsoft and there are going to be 2 teams Green and Tan. 1 screen for each team. so I guess technically 2 timers with the format of MM:SS. when the 3 way toggle is up green timer starts middle no timer is active and down is tan timer.

Thank you for your time

5

a lot of my problem seems to be I can’t put a variable into a digit or I am doing it wrong

6

so this is the code I created and all that displays is what appears to be a lowercase r in digit 0 and the colon is on

#include <SparkFun_Alphanumeric_Display.h>
#include <Wire.h>
HT16K33 display;

int minTen = 1;
int minOne = 2;
int secTen = 3;
int secOne = 4;
//char numbers = 1234;

void setup() {
  // put your setup code here, to run once:
 SerialUSB.begin(115200);
  SerialUSB.println("SparkFun Qwiic Alphanumeric - Example 1: Print String");

  Wire.begin(); //Join I2C bus

  if (display.begin() == false)
  {
    SerialUSB.println("Device did not acknowledge! Freezing.");
    while (1);
  }
  SerialUSB.println("Display acknowledged.");
}

void loop() {
  // put your main code here, to run repeatedly:
  int minTen = 1;
      display.colonOn();
  display.printChar('minTen', 0);
  display.updateDisplay();
}
7

Attached a example as a starting point.

It handles 2 timers, 3-way toggle, 2 displays and you can provide keyboard input for reset, adjust brightness and adjust blinkrate.

It compiles, but it is not tested as I do not have these displays.

TimersExample.zip (2.34 KB)