{"id":692,"date":"2014-07-14T15:49:26","date_gmt":"2014-07-14T13:49:26","guid":{"rendered":"https:\/\/tinusaur.org\/?page_id=692"},"modified":"2022-01-17T21:59:20","modified_gmt":"2022-01-17T19:59:20","slug":"max7219led8x8","status":"publish","type":"page","link":"https:\/\/tinusaur.org\/projects\/max7219led8x8\/","title":{"rendered":"MAX7219LED8x8"},"content":{"rendered":"\n<p class=\"has-black-color has-text-color has-background\" style=\"background-color:#eeeeee\"><strong>UPDATE <\/strong>2022: The <strong>MAX7219LED8x8<\/strong> library, now renamed to <a href=\"https:\/\/tinusaur.com\/libraries\/max7219tiny\/\"><strong>MAX7219tiny<\/strong><\/a> has now a new home at <a href=\"https:\/\/tinusaur.com\/libraries\/max7219tiny\/\">tinusaur.com\/libraries\/max7219tiny\/<\/a>. Check also this\u00a0<a href=\"https:\/\/tinusaur.com\/tutorials\/max7219-attiny85-interface\/\"><strong>MAX7219<\/strong> &amp; <strong>ATtiny85<\/strong> tutorial<\/a>\u00a0to learn how the library works.<\/p>\n\n\n\n<p>MAX7219Led8x8 is a C library for working with the <a title=\"MAX7219 Serially Interfaced, 8-Digit, LED Display Drivers\" href=\"http:\/\/www.maximintegrated.com\/en\/products\/power\/display-power-control\/MAX7219.html\" target=\"_blank\" rel=\"noopener\">MAX7219<\/a> display driver to control 8&#215;8 <a title=\"Light-emitting diode\" href=\"https:\/\/en.wikipedia.org\/wiki\/Light-emitting_diode\" target=\"_blank\" rel=\"noopener\">LED<\/a> matrix. It is intended to be used with the <a title=\"About\" href=\"\/about\/\">Tinusaur<\/a> board but should also work with any other board based on <a title=\"Atmel ATtiny85\" href=\"http:\/\/www.atmel.com\/devices\/attiny85.aspx\" target=\"_blank\" rel=\"noopener\">ATtiny85<\/a> or similar <a title=\"Microcontroller\" href=\"https:\/\/en.wikipedia.org\/wiki\/Microcontroller\" target=\"_blank\" rel=\"noopener\">microcontroller<\/a>.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/20140714_161410_max7219_15_cs600x440fx.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"440\" src=\"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/20140714_161410_max7219_15_cs600x440fx.jpg\" alt=\"MAX7219 with LED matrix 8x8\" class=\"wp-image-718\" srcset=\"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/20140714_161410_max7219_15_cs600x440fx.jpg 600w, https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/20140714_161410_max7219_15_cs600x440fx-300x220.jpg 300w, https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/20140714_161410_max7219_15_cs600x440fx-262x192.jpg 262w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/a><\/figure><\/div>\n\n\n\n<h1 class=\"wp-block-heading\">MAX7219<\/h1>\n\n\n\n<p>The <a title=\"MAX7219 Serially Interfaced, 8-Digit, LED Display Drivers\" href=\"http:\/\/www.maximintegrated.com\/en\/products\/power\/display-power-control\/MAX7219.html\" target=\"_blank\" rel=\"noopener\">MAX7219<\/a>&nbsp;is manufactured by&nbsp;<a title=\"Maxim Integrated\" href=\"http:\/\/www.maximintegrated.com\" target=\"_blank\" rel=\"noopener\">Maxim Integrated<\/a>&nbsp;is&nbsp;compact, serial input\/output common-cathode display driver that could interface microcontrollers to 64 individual LEDs, 7-segment numeric LED displays of up to 8 digits, bar-graph displays, etc. Included on-chip are a BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8&#215;8 static RAM that stores each digit. Only one external resistor is required to set the segment current for all LEDs.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/max7219_timing_diagram_sc600x340.png\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"340\" src=\"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/max7219_timing_diagram_sc600x340.png\" alt=\"MAX7219 Timing Diagram\" class=\"wp-image-724\" srcset=\"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/max7219_timing_diagram_sc600x340.png 600w, https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/max7219_timing_diagram_sc600x340-300x170.png 300w, https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/max7219_timing_diagram_sc600x340-314x178.png 314w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/a><\/figure><\/div>\n\n\n\n<p>To put that in simpler words &#8211; with the&nbsp;MAX7219 driver it is possible to control 8&#215;8 LED matrix using just 2 wires serial interface &#8211; one for the sync clock and one for the data. There is another wire that could be used to enable\/disable the communication with the chip. The maximum frequency for the serial interface is&nbsp;10MHz.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">LED Matrix 8&#215;8<\/h1>\n\n\n\n<p>The LED matrix 8&#215;8 is connected almost diretcly to the&nbsp;MAX7219 driver &#8211; only few external components are required.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"630\" src=\"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/max7219_led8x8_module_ce600x630fx.png\" alt=\"MAX7219 LED 8x8 Module Schematics\" class=\"wp-image-720\" srcset=\"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/max7219_led8x8_module_ce600x630fx.png 600w, https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/max7219_led8x8_module_ce600x630fx-286x300.png 286w, https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/max7219_led8x8_module_ce600x630fx-183x192.png 183w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure><\/div>\n\n\n\n<h1 class=\"wp-block-heading\">Library<\/h1>\n\n\n\n<p>Working with&nbsp;MAX7219 is very simple &#8211; turning on and off individual LEDs is done by sending 2-bytes command to the driver containing the row and the byte&nbsp;which bits define which LED value to set.<\/p>\n\n\n\n<p>There are also few other command that are needed during the initialization process.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/max7219_commands_cs600x720fx.png\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"720\" src=\"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/max7219_commands_cs600x720fx.png\" alt=\"MAX7219 Registers and Commands\" class=\"wp-image-726\" srcset=\"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/max7219_commands_cs600x720fx.png 600w, https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/max7219_commands_cs600x720fx-250x300.png 250w, https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2014\/07\/max7219_commands_cs600x720fx-160x192.png 160w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/a><\/figure><\/div>\n\n\n\n<p>The library supports short buffer &#8211; only 8 bytes in size&nbsp;&#8211; to keep the values before sending them to the driver.<\/p>\n\n\n\n<p>MAX7219LED8x8&nbsp;is written in plain C and does not require any additional libraries to function except those that come with the <a href=\"https:\/\/tinusaur.com\/guides\/winavr-setup-guide\/\">WinAVR SDK<\/a>.<\/p>\n\n\n\n<p>The library consists of 2 file:<\/p>\n\n\n\n<ul><li>max7219led8x8.h<\/li><li>max7219led8x8.c<\/li><\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Source Code<\/h1>\n\n\n\n<p>MAX7219_DIN,&nbsp;MAX7219_CS,&nbsp;MAX7219_CLK define the&nbsp;microcontroller pins that will be used to connect to the driver.<\/p>\n\n\n\n<p><strong>max7219led8x8.h<\/strong><\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n\/*\n * MAX7219Led8x8 - Tinusaur MAX7219 Library for LED 8x8 Matrix\n *\n * @file: max7219led8x8.h\n * @created: 2014-07-12\n * @author: Neven Boyanov\n *\n * Source code available at: https:\/\/bitbucket.org\/tinusaur\/max7219led8x8\n *\n *\/\n\n#ifndef MAX7219LED8X8_H\n#define MAX7219LED8X8_H\n\n\/\/ ---------------------    \/\/ Vcc, Pin 1 on LED8x8 Board\n\/\/ ---------------------    \/\/ GND, Pin 2 on LED8x8 Board\n#ifndef MAX7219_DIN\n#define MAX7219_DIN     PB0 \/\/ DI,  Pin 3 on LED8x8 Board\n#endif\n#ifndef MAX7219_CS\n#define MAX7219_CS      PB1 \/\/ CS,  Pin 4 on LED8x8 Board\n#endif\n#ifndef MAX7219_CLK\n#define MAX7219_CLK     PB2 \/\/ CLK, Pin 5 on LED8x8 Board\n#endif\n\nvoid MAX7219_byte(uint8_t data);\nvoid MAX7219_word(uint8_t address,uint8_t dat);\nvoid MAX7219_init(void);\nvoid MAX7219_row(uint8_t address,uint8_t dat);\nvoid MAX7219_buffer_out(void);\nvoid MAX7219_buffer_set(uint8_t x, uint8_t y);\nvoid MAX7219_buffer_clr(uint8_t x, uint8_t y);\n\n#endif\n<\/pre><\/div>\n\n\n<p><strong>max7219led8x8.c<\/strong><\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n\/*\n * MAX7219Led8x8 - Tinusaur MAX7219 Library for LED 8x8 Matrix\n *\n * @file: max7219led8x8.h\n * @created: 2014-07-12\n * @author: Neven Boyanov\n *\n * Source code available at: https:\/\/bitbucket.org\/tinusaur\/max7219led8x8\n *\n *\/\n\n#include &lt;stdlib.h&gt;\n#include &lt;avr\/io.h&gt;\n#include &lt;util\/delay.h&gt;\n\n#include &quot;max7219led8x8.h&quot;\n\nvoid MAX7219_byte(uint8_t data)\n{\n    PORTB &amp;= ~(1 &lt;&lt; MAX7219_CS);    \/\/ Set to LOW\n    for(uint8_t i = 8; i &gt;= 1; i--)\n    {\n        PORTB &amp;= ~(1 &lt;&lt; MAX7219_CLK);   \/\/ Set to LOW\n        if ((data &amp; 0x80) != 0)         \/\/ Mask the MSB of the data\n            PORTB |= (1 &lt;&lt; MAX7219_DIN);    \/\/ Set to HIGH\n        else\n            PORTB &amp;= ~(1 &lt;&lt; MAX7219_DIN);   \/\/ Set to LOW\n        data = data&lt;&lt;1;\n        PORTB |= (1 &lt;&lt; MAX7219_CLK);        \/\/ Set to HIGH\n    }\n}\n\nvoid MAX7219_word(uint8_t address, uint8_t data)\n{\n    PORTB &amp;= ~(1 &lt;&lt; MAX7219_CS);    \/\/ Set to LOW\n    MAX7219_byte(address);          \/\/\n    MAX7219_byte(data);             \/\/\n    PORTB |= (1 &lt;&lt; MAX7219_CS);     \/\/ Set to HIGH\n}\n\nvoid MAX7219_init(void)\n{\n    DDRB |= (1 &lt;&lt; MAX7219_CLK); \/\/ Set port as output\n    DDRB |= (1 &lt;&lt; MAX7219_CS);  \/\/ Set port as output\n    DDRB |= (1 &lt;&lt; MAX7219_DIN); \/\/ Set port as output\n    _delay_ms(50);  \/\/ TODO: Q: Is this necessary?\n    MAX7219_word(0x09, 0x00);   \/\/ Decode: BCD\n    MAX7219_word(0x0a, 0x03);   \/\/ Brightness\n    MAX7219_word(0x0b, 0x07);   \/\/\n    MAX7219_word(0x0c, 0x01);   \/\/\n    MAX7219_word(0x0f, 0x00);   \/\/\n}\n\nvoid MAX7219_row(uint8_t address, uint8_t data) {\n    if (address &gt;= 1 &amp;&amp; address &lt;= 8) MAX7219_word(address, data);\n}\n\nuint8_t MAX7219_buffer&#x5B;8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };\n\nvoid MAX7219_buffer_out(void) {\n    \/\/ Output the buffer\n    for (uint8_t row = 1; row &lt;= 8; row++)\n        MAX7219_row(row, MAX7219_buffer&#x5B;row - 1]);\n}\n\nvoid MAX7219_buffer_set(uint8_t x, uint8_t y) {\n    uint8_t sx = 7 - (x &amp; 0b0111);\n    uint8_t sy = (y &amp; 0b0111);\n    MAX7219_buffer&#x5B;sy] |= (1 &lt;&lt; sx);\n}\n\nvoid MAX7219_buffer_clr(uint8_t x, uint8_t y) {\n    uint8_t sx = 7 - (x &amp; 0b0111);\n    uint8_t sy = (y &amp; 0b0111);\n    MAX7219_buffer&#x5B;sy] &amp;= ~(1 &lt;&lt; sx);\n}\n<\/pre><\/div>\n\n\n<p>Please note that the source code above may improve or change so check the latest version at the source code repository on this address <a title=\"Soiurce code for MAX7219Led8x8 - Tinusaur MAX7219 Library for LED 8x8 Matrix\" href=\"https:\/\/bitbucket.org\/tinusaur\/max7219led8x8\" target=\"_blank\" rel=\"noopener\">https:\/\/bitbucket.org\/tinusaur\/max7219led8x8<\/a>.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Usage<\/h1>\n\n\n\n<p>This is a fragment of code using this library &#8230;<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n    MAX7219_init();\n    MAX7219_buffer_set(2, 3); \/\/ Set pixel\n    MAX7219_buffer_clr(4, 5); \/\/ Clear pixel\n    MAX7219_buffer_out(); \/\/ Output the buffer\n<\/pre><\/div>\n\n\n<p>This will do the folowing:<\/p>\n\n\n\n<ul><li>initialize the driver<\/li><li>set a pixel &#8211; turn a LED on<\/li><li>clear a pixel &#8211; turn a LED off<\/li><li>send buffer to driver<\/li><\/ul>\n\n\n\n<p>Very simple, isn&#8217;t it?<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Testing Program<\/h1>\n\n\n\n<p>The following is a very simple program that uses the library. It will&nbsp;turn on all the LEDs &#8211; one by one, then it will turn them off the same way.<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n\/*\n * MAX7219Led8x8 - Tinusaur MAX7219 Library for LED 8x8 Matrix\n *\n * @file: main.c\n * @created: 2014-07-12\n * @author: Neven Boyanov\n *\n * Source code available at: https:\/\/bitbucket.org\/tinusaur\/max7219led8x8\n *\n *\/\n\n#define F_CPU 1000000UL\n\n#include &lt;stdlib.h&gt;\n#include &lt;avr\/io.h&gt;\n#include &lt;util\/delay.h&gt;\n\n\/\/ ---------------------    \/\/ Vcc, Pin 1 on LED8x8 Board\n\/\/ ---------------------    \/\/ GND, Pin 2 on LED8x8 Board\n#define MAX7219_DIN     PB0 \/\/ DI,  Pin 3 on LED8x8 Board\n#define MAX7219_CS      PB1 \/\/ CS,  Pin 4 on LED8x8 Board\n#define MAX7219_CLK     PB2 \/\/ CLK, Pin 5 on LED8x8 Board\n\n#include &quot;..\/max7219led8x8\/max7219led8x8.h&quot;\n\nint main(void) {\n\n    \/\/ ---- Initialization ----\n    MAX7219_init();\n\n    \/\/ ---- Main Loop ----\n    while (1) {\n        for (uint8_t y = 0; y &lt;= 7; y++) {\n            for (uint8_t x = 0; x &lt;= 7; x++) {\n                MAX7219_buffer_out();   \/\/ Output the buffer\n                MAX7219_buffer_set(x, y);   \/\/ Set pixel\n                _delay_ms(10);\n            }\n        }\n        for (uint8_t y = 0; y &lt;= 7; y++) {\n            for (uint8_t x = 0; x &lt;= 7; x++) {\n                MAX7219_buffer_out();   \/\/ Output the buffer\n                MAX7219_buffer_clr(x, y);   \/\/ Clear pixel\n                _delay_ms(10);\n            }\n        }\n    }\n\n    return 0;\n}\n<\/pre><\/div>\n\n\n<p>The program does this in an infinite loop.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">External Resources<\/h1>\n\n\n\n<p>The source code of the MAX7219LED8x8 library&nbsp;is available at&nbsp;<a title=\"Soiurce code for MAX7219Led8x8 - Tinusaur MAX7219 Library for LED 8x8 Matrix\" href=\"https:\/\/bitbucket.org\/tinusaur\/max7219led8x8\" target=\"_blank\" rel=\"noopener\">https:\/\/bitbucket.org\/tinusaur\/max7219led8x8<\/a><\/p>\n\n\n\n<p>MAX7219 specification and datasheet:<\/p>\n\n\n\n<ul><li><a title=\"MAX7219 - Serially Interfaced, 8-Digit, LED Display Drivers\" href=\"http:\/\/www.maximintegrated.com\/en\/products\/power\/display-power-control\/MAX7219.html\" target=\"_blank\" rel=\"noopener\">http:\/\/www.maximintegrated.com\/en\/products\/power\/display-power-control\/MAX7219.html<\/a><\/li><li><a title=\"MAX7219 Datasheet and specification PDF\" href=\"http:\/\/datasheets.maximintegrated.com\/en\/ds\/MAX7219-MAX7221.pdf\" target=\"_blank\" rel=\"noopener\">http:\/\/datasheets.maximintegrated.com\/en\/ds\/MAX7219-MAX7221.pdf<\/a><\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>UPDATE 2022: The MAX7219LED8x8 library, now renamed to MAX7219tiny has now a new home at tinusaur.com\/libraries\/max7219tiny\/. Check also this\u00a0MAX7219 &amp; ATtiny85 tutorial\u00a0to learn how the library works. MAX7219Led8x8 is a C library for working with the MAX7219 display driver to control 8&#215;8 LED matrix. It is intended to be used with the Tinusaur board but &#8230; <a title=\"MAX7219LED8x8\" class=\"read-more\" href=\"https:\/\/tinusaur.org\/projects\/max7219led8x8\/\" aria-label=\"Read more about MAX7219LED8x8\">Read more<\/a><\/p>\n","protected":false},"author":54,"featured_media":1695,"parent":654,"menu_order":7,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>MAX7219LED8x8 - The Tinusaur Project<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/tinusaur.org\/projects\/max7219led8x8\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MAX7219LED8x8 - The Tinusaur Project\" \/>\n<meta property=\"og:description\" content=\"UPDATE 2022: The MAX7219LED8x8 library, now renamed to MAX7219tiny has now a new home at tinusaur.com\/libraries\/max7219tiny\/. Check also this\u00a0MAX7219 &amp; ATtiny85 tutorial\u00a0to learn how the library works. MAX7219Led8x8 is a C library for working with the MAX7219 display driver to control 8&#215;8 LED matrix. It is intended to be used with the Tinusaur board but ... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/tinusaur.org\/projects\/max7219led8x8\/\" \/>\n<meta property=\"og:site_name\" content=\"The Tinusaur Project\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/tinusaur\/\" \/>\n<meta property=\"article:modified_time\" content=\"2022-01-17T19:59:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2016\/06\/20140722_max7219led8x8_life_01_cs1230x1230fx3.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1230\" \/>\n\t<meta property=\"og:image:height\" content=\"1230\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@tinusaur\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/tinusaur.org\/projects\/max7219led8x8\/\",\"url\":\"https:\/\/tinusaur.org\/projects\/max7219led8x8\/\",\"name\":\"MAX7219LED8x8 - The Tinusaur Project\",\"isPartOf\":{\"@id\":\"https:\/\/tinusaur.org\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/tinusaur.org\/projects\/max7219led8x8\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/tinusaur.org\/projects\/max7219led8x8\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2016\/06\/20140722_max7219led8x8_life_01_cs1230x1230fx3.jpg\",\"datePublished\":\"2014-07-14T13:49:26+00:00\",\"dateModified\":\"2022-01-17T19:59:20+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/tinusaur.org\/projects\/max7219led8x8\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/tinusaur.org\/projects\/max7219led8x8\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/tinusaur.org\/projects\/max7219led8x8\/#primaryimage\",\"url\":\"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2016\/06\/20140722_max7219led8x8_life_01_cs1230x1230fx3.jpg\",\"contentUrl\":\"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2016\/06\/20140722_max7219led8x8_life_01_cs1230x1230fx3.jpg\",\"width\":1230,\"height\":1230,\"caption\":\"Tinusaur Conway's Game of Life\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/tinusaur.org\/projects\/max7219led8x8\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/tinusaur.org\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Projects\",\"item\":\"https:\/\/tinusaur.org\/projects\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"MAX7219LED8x8\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/tinusaur.org\/#website\",\"url\":\"https:\/\/tinusaur.org\/\",\"name\":\"The Tinusaur Project\",\"description\":\"BE SMARTER! Make, play and learn with the Tinusaur microcontroller boards.\",\"publisher\":{\"@id\":\"https:\/\/tinusaur.org\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/tinusaur.org\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/tinusaur.org\/#organization\",\"name\":\"Tinusaur\",\"url\":\"https:\/\/tinusaur.org\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/tinusaur.org\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/org.tinusaur.net\/wp-content\/uploads\/sites\/9\/2018\/09\/cropped-tinusaur09a_c1440x1440t21.png\",\"contentUrl\":\"https:\/\/org.tinusaur.net\/wp-content\/uploads\/sites\/9\/2018\/09\/cropped-tinusaur09a_c1440x1440t21.png\",\"width\":512,\"height\":512,\"caption\":\"Tinusaur\"},\"image\":{\"@id\":\"https:\/\/tinusaur.org\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/tinusaur\/\",\"https:\/\/twitter.com\/tinusaur\",\"https:\/\/www.instagram.com\/tinusaur\/\",\"https:\/\/www.linkedin.com\/company\/tinusaur\",\"https:\/\/www.pinterest.com\/tinusaur\/_created\/\",\"https:\/\/www.youtube.com\/tinusaur\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"MAX7219LED8x8 - The Tinusaur Project","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/tinusaur.org\/projects\/max7219led8x8\/","og_locale":"en_US","og_type":"article","og_title":"MAX7219LED8x8 - The Tinusaur Project","og_description":"UPDATE 2022: The MAX7219LED8x8 library, now renamed to MAX7219tiny has now a new home at tinusaur.com\/libraries\/max7219tiny\/. Check also this\u00a0MAX7219 &amp; ATtiny85 tutorial\u00a0to learn how the library works. MAX7219Led8x8 is a C library for working with the MAX7219 display driver to control 8&#215;8 LED matrix. It is intended to be used with the Tinusaur board but ... Read more","og_url":"https:\/\/tinusaur.org\/projects\/max7219led8x8\/","og_site_name":"The Tinusaur Project","article_publisher":"https:\/\/www.facebook.com\/tinusaur\/","article_modified_time":"2022-01-17T19:59:20+00:00","og_image":[{"width":1230,"height":1230,"url":"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2016\/06\/20140722_max7219led8x8_life_01_cs1230x1230fx3.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_site":"@tinusaur","twitter_misc":{"Est. reading time":"6 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/tinusaur.org\/projects\/max7219led8x8\/","url":"https:\/\/tinusaur.org\/projects\/max7219led8x8\/","name":"MAX7219LED8x8 - The Tinusaur Project","isPartOf":{"@id":"https:\/\/tinusaur.org\/#website"},"primaryImageOfPage":{"@id":"https:\/\/tinusaur.org\/projects\/max7219led8x8\/#primaryimage"},"image":{"@id":"https:\/\/tinusaur.org\/projects\/max7219led8x8\/#primaryimage"},"thumbnailUrl":"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2016\/06\/20140722_max7219led8x8_life_01_cs1230x1230fx3.jpg","datePublished":"2014-07-14T13:49:26+00:00","dateModified":"2022-01-17T19:59:20+00:00","breadcrumb":{"@id":"https:\/\/tinusaur.org\/projects\/max7219led8x8\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/tinusaur.org\/projects\/max7219led8x8\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/tinusaur.org\/projects\/max7219led8x8\/#primaryimage","url":"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2016\/06\/20140722_max7219led8x8_life_01_cs1230x1230fx3.jpg","contentUrl":"https:\/\/tinusaur.org\/wp-content\/uploads\/sites\/9\/2016\/06\/20140722_max7219led8x8_life_01_cs1230x1230fx3.jpg","width":1230,"height":1230,"caption":"Tinusaur Conway's Game of Life"},{"@type":"BreadcrumbList","@id":"https:\/\/tinusaur.org\/projects\/max7219led8x8\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/tinusaur.org\/"},{"@type":"ListItem","position":2,"name":"Projects","item":"https:\/\/tinusaur.org\/projects\/"},{"@type":"ListItem","position":3,"name":"MAX7219LED8x8"}]},{"@type":"WebSite","@id":"https:\/\/tinusaur.org\/#website","url":"https:\/\/tinusaur.org\/","name":"The Tinusaur Project","description":"BE SMARTER! Make, play and learn with the Tinusaur microcontroller boards.","publisher":{"@id":"https:\/\/tinusaur.org\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/tinusaur.org\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/tinusaur.org\/#organization","name":"Tinusaur","url":"https:\/\/tinusaur.org\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/tinusaur.org\/#\/schema\/logo\/image\/","url":"https:\/\/org.tinusaur.net\/wp-content\/uploads\/sites\/9\/2018\/09\/cropped-tinusaur09a_c1440x1440t21.png","contentUrl":"https:\/\/org.tinusaur.net\/wp-content\/uploads\/sites\/9\/2018\/09\/cropped-tinusaur09a_c1440x1440t21.png","width":512,"height":512,"caption":"Tinusaur"},"image":{"@id":"https:\/\/tinusaur.org\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/tinusaur\/","https:\/\/twitter.com\/tinusaur","https:\/\/www.instagram.com\/tinusaur\/","https:\/\/www.linkedin.com\/company\/tinusaur","https:\/\/www.pinterest.com\/tinusaur\/_created\/","https:\/\/www.youtube.com\/tinusaur"]}]}},"jetpack_sharing_enabled":true,"jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/PdBsNF-ba","_links":{"self":[{"href":"https:\/\/tinusaur.org\/wp-json\/wp\/v2\/pages\/692"}],"collection":[{"href":"https:\/\/tinusaur.org\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/tinusaur.org\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/tinusaur.org\/wp-json\/wp\/v2\/users\/54"}],"replies":[{"embeddable":true,"href":"https:\/\/tinusaur.org\/wp-json\/wp\/v2\/comments?post=692"}],"version-history":[{"count":5,"href":"https:\/\/tinusaur.org\/wp-json\/wp\/v2\/pages\/692\/revisions"}],"predecessor-version":[{"id":3878,"href":"https:\/\/tinusaur.org\/wp-json\/wp\/v2\/pages\/692\/revisions\/3878"}],"up":[{"embeddable":true,"href":"https:\/\/tinusaur.org\/wp-json\/wp\/v2\/pages\/654"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tinusaur.org\/wp-json\/wp\/v2\/media\/1695"}],"wp:attachment":[{"href":"https:\/\/tinusaur.org\/wp-json\/wp\/v2\/media?parent=692"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}