MAX7219 is an integrated serial input / output common-cathode display drivers , which connects the microprocessor 7-segment digital LED display with 8 digits , bar graph can also be connected monitor or 64 separate LED.*On type B BCD encoder includes an on-chip , multi-channel scanning loop , segment word drive, but also a 8x8 static RAM for storing each data single module can drive a common cathode 8 * 8 dot matrix*Operating voltage : 5V Module size : 5 cm X 3.2 cm wide X 1.5 cm high holes with four screws , diameter 3mm, can be fixed by using our M3 studs modules with input and output interfaces , support for cascading multiple modules
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