A new shield for the Wemos Mini came my way recently, this is called the MATRIX LED Shield – You can find out more at https://wiki.wemos.cc/products:d1_mini_shields:matrix_led_shield
The board uses a TM1640, as you can see there are 8×8 LEDs with 8 levels of intensity. The shield will also use the D5 an D7 pins of your wemos mini, so these won’t be available for any other projects
Code
This requires the library from https://github.com/wemos/WEMOS_Matrix_LED_Shield_Arduino_Library
There are a couple of built in examples but here are a few examples that will flash various LEDs
[codesyntax lang=”cpp”]
#include <WEMOS_Matrix_LED.h>
MLED mled(5); //set intensity=5
void setup()
{
}
void loop() {
for(int y=0;y<8;y++)
{
for(int x=0;x<8;x++)
{
mled.dot(x,y); // draw dot
mled.display();
delay(200);
}
}
}
[/codesyntax]
[codesyntax lang=”cpp”]
#include <WEMOS_Matrix_LED.h>
MLED mled(5); //set intensity=5
void setup()
{
}
void loop() {
for(int y=0;y<8;y++)
{
mled.dot(0,y); // draw dot
mled.display();
delay(200);
}
}
[/codesyntax]
[codesyntax lang=”cpp”]
#include <WEMOS_Matrix_LED.h>
MLED mled(5); //set intensity=5
int randX, randY;
void setup()
{
Serial.begin(9600);
randomSeed(analogRead(0));
}
void loop()
{
randX = random(8);
randY = random(8);
mled.dot(randX,randY); // draw dot
mled.display();
delay(200);
}
[/codesyntax]
[codesyntax lang=”cpp”]
#include <WEMOS_Matrix_LED.h>
MLED mled(5); //set intensity=5
int randX, randY;
void setup()
{
Serial.begin(9600);
randomSeed(analogRead(0));
}
void loop()
{
randX = random(8);
randY = random(8);
mled.dot(randX,randY); // draw dot
mled.display();
delay(200);
mled.dot(randX,randY,0);//clear dot
mled.display();
delay(200);
}
[/codesyntax]
Links
