This is Dot Led Matrix Module incorporating MAX7219 Driver chip. By using this dot LED
module in your upcoming project, you will be able to add some great cool animation.
The individual module features 8×8 LED’s, each controlled very precisely by the MAX7219
driver to generate the colour pattern you wish. The great advantage of using this is users
will have control over all of the 64 LED by just connecting 3 output communication wires to
microcontrollers like Arduino etc. This product has 4 Dot Matrix LED’s cascaded to form a
single LED Display to allot more area to the user on the display. Connecting the two modules
is also very easy. Only connect the output pins of the previous breakout board to the input
pins of the new module, thus with such arrangement, you can connect as many DOT LED Modules
to the Arduino as you wish!!! Great…… The MAX7219 Dot Led Matrix Module is a serial input
common-cathode driver that interfaces micro-controllers to LED matrices. All common
micro-controllers can be connected to this module by using a 4-wire serial interface. Each
output can be addressed without refreshing the entire display. This module requires only 3
I/O lines for driving the display, making it ideal for your microcontroller projects. Only
one external register is used to set the segment current of each LED.