Max7219 Dot Matrix Module
This dot matrix module is couple with ic MAX7219 which now able you to control the dot matrix by using only 3 pin. Originally, dot matrix have a lot of pin which mean you need a lot of pin from your microcontroller. Now with this module, you can control a lot of dot matrix only by using 3 pin (serial connection) .
+ Application : Electronic signboard
+ Arduino Library
+ Max7219 Datasheet
Hookup 2 Module