View source for Ks0064 keyestudio I2C 8x8 LED Matrix HT16K33


[[image:Ks0064-图片1.png|thumb|600px|right|Keyestudio I2C 8x8 LED Matrix HT16K33]]

==Introduction==
A fun way to make a small display is to use an 8x8 matrix or a 4-digit 7-segment display. Matrices like these are 'multiplexed' - to control 64 LEDs you need 16 pins. That's a lot of pins, and there are driver chips like the MAX7219 that can control a matrix for you, but there's a lot of wiring to set up and they take up a ton of space. After all, wouldn't it be awesome if you could control a matrix without tons of wiring? That's where these lovely LED matrix backpacks come in. <br>
The matrices use the constant-current drivers for ultra-bright, consistent color, 1/16 step display dimming, all via a simple I2C interface.
<br>[[Image:KS0336 (3)--.jpg|500px|frameless]]<br>

== Features ==
* 8 rows and 8 cols LED matrix
* Driven by HT16K33 chip
* Access to I2C communication pins
* Occupy less IO ports of microcontrollers
* Easy connection and available for more experiment extensions


== Parameters==
* Input voltage: 5V    
* Rated input frequency: 400KHZ 
* Input power: 2.5W  
* Input current: 500mA 


==Pinout==
<br>[[Image:Pinouts.jpg|600px|frameless]]<br>


==Wire it Up==
Connect the SCL pin to Analog A5, SDA pin to Analog A4 port; Connect VCC pin to 5V port, GND pin to GND.
<br>[[Image:KS0064.jpg|800px|frameless]]<br>


==Sample Code==
Below is an example code, you can upload it to [http://wiki.keyestudio.com/index.php/Download_Arduino_IDE  Arduino IDE].
*[http://wiki.keyestudio.com/index.php/Download_Arduino_IDE   Download Arduino IDE ]
*[http://wiki.keyestudio.com/index.php/Install_Arduino_Driver   Install Arduino Driver  ]
*[http://wiki.keyestudio.com/index.php/Install_Arduino_Library   Install Arduino Library ]

<pre>
#include <Wire.h>
#include "Adafruit_LEDBackpack.h"
#include "Adafruit_GFX.h"
#ifndef _BV
#define _BV(bit) (1<<(bit))
#endif
Adafruit_LEDBackpack matrix = Adafruit_LEDBackpack();
uint8_t counter = 0;
void setup() {
  Serial.begin(9600);
  Serial.println("HT16K33 test");
  matrix.begin(0x70);  // pass in the address
}
void loop() {
  // paint one LED per row. The HT16K33 internal memory looks like
  // a 8x16 bit matrix (8 rows, 16 columns)
  for (uint8_t i=0; i<8; i++) {
// draw a diagonal row of pixels

    matrix.displaybuffer[i] = _BV((counter+i) % 16) | _BV((counter+i+8) % 16)  ;
  }
  // write the changes we just made to the display
  matrix.writeDisplay();
  delay(100);
 counter++;
  if (counter >= 16) counter = 0;  
}
</pre>

'''Note:''' before upload the code, you should place the library inside Arduino libraries. Or else fail to compile it. 

You can download the code libraries from the link below: <br>
https://drive.google.com/open?id=1FUTIwsfGdxTXXgYDGxI7U2VoP0g3G-2L


==Example Result==
Done wiring and powered up, upload well the code to UNO board, you will see the dot matrix display the image shown below. 
<br>[[Image:KS0336-2.jpg|800px|frameless]]<br>


== Resources ==

* [https://fs.keyestudio.com/KS0064    Click here to download the code libraries]

* '''Video：''' http://video.keyestudio.com/ks0064/


<br>

== Buy From ==

* [https://www.keyestudio.com/keyestudio-red-color-common-cathode-i2c-88-led-dot-matrix-module-ht16k33-for-arduino-p0265-p0265.html    '''Official Website''' ] 

* [https://www.ebay.com/itm/132594433342  '''From eBay''']

* [https://www.aliexpress.com/store/product/Keyestudio-Red-color-common-cathode-I2C-8-8-LED-dot-Matrix-module-HT16K33-for-arduino/1452162_32617887351.html?spm=2114.12010612.8148356.19.2ad52933y2jfa6     '''From Aliexpress''']

* '''Shop on amazon store:''' https://www.amazon.com/dp/B0179AGI9K


[[category:Module]]