Demo of the Grid-EYE IR sensor using an LED array

GridEYE_LEDs.ino

/**
 * GridEye LED Array Demo
 * Author: Shawn Hymel (SparkFun Electronics)
 * Date: May 1, 2018
 * 
 * Displays a heat map of what the GridEye sees (8x8 pixels).
 * 
 * Required Components
 *  - Arduino: https://www.sparkfun.com/products/13975
 *  - Qwiic Shield: https://www.sparkfun.com/products/14352
 *  - Qwiic cable: https://www.sparkfun.com/products/14426
 *  - Grid-EYE Breakout: https://www.sparkfun.com/products/14607
 *  - 8x8 NeoPixel Array: https://www.sparkfun.com/products/12662
 *  - Wire: https://www.sparkfun.com/products/8867
 * 
 * Hardware connections:
 *  - Connect the GridEye over QWIIC
 *  - 8x8 RGB LED array VCC to 5V (Arduino)
 *  - 8x8 RGB LED array GND to GND (Arduino)
 *  - 8x8 RGB LED array DIN to pin 3 (Arduino)
 * 
 * MIT License: Permission is hereby granted, free of charge, to any person obtaining a copy of this 
 * software and associated documentation files (the "Software"), to deal in the Software without 
 * restriction, including without limitation the rights to use, copy, modify, merge, publish, 
 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the 
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or 
 * substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 * Feel like supporting our work? Buy a board from SparkFun!
 * https://www.sparkfun.com/products/14607
 */

#include <Wire.h>
#include <FastLED.h>
#include <SparkFun_GridEYE_Arduino_Library.h>

// Parameters
const int MIN_TEMP = 22;
const int MAX_TEMP = 30;
const int NUM_LEDS = 64;
const int MAX_X = 8;
const int MAX_Y = 8;
const int BRIGHTNESS = 50;
const int SATURATION = 255;

// Pins
const int DATA_PIN = 3;

// Globals
CRGB leds[NUM_LEDS];
GridEYE grideye;
uint8_t temps[NUM_LEDS];

void setup() {

  // Init LED array
  FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);

  // Start I2C and init GridEye
  Wire.begin();
  grideye.begin();
}

void loop() {

  uint8_t idx;
  float pixel_temp;

  // Read temperature values from GridEye
  for ( int y = 0; y < MAX_Y; y++ ) {
    for ( int x = 0; x < MAX_X; x++ ) {

      // Read temperature and constrain it to a min and max
      idx = (y * MAX_X) + x;
      pixel_temp = grideye.getPixelTemperature(idx);
      if ( pixel_temp < MIN_TEMP ) {
        pixel_temp = MIN_TEMP;
      } else if ( pixel_temp > MAX_TEMP ) {
        pixel_temp = MAX_TEMP;
      }

      // Map temperatures in an array and rotate image 90 deg CW
      temps[(x * MAX_Y) + y] = map( (pixel_temp * 100), 
                                    (MIN_TEMP * 100), 
                                    (MAX_TEMP * 100), 
                                    127, 
                                    0 );
      
      // Map temperatures to hue in HSV space
      leds[idx] = CHSV(temps[idx], SATURATION, BRIGHTNESS);
    }
  }

  // Let LEDs update
  FastLED.show();
  delay(50);
}

Hi, can you send me the schematics to connect a led matriz to a arduino uno?

Not sure what kind of LED array you're looking for. This sketch uses the Adafruit NeoPixel 8x8 grid, which you can find how to use here: NeoPixel Uberguide. Here's an example of wiring a basic LED matrix to Arduino. Finally, here is how to wire a Charlieplex array to an Arduino.