4pcs MAX7219 Dot Matrix Display Module Single-Chip Control LED Module DIY Kit for Arduino with 5pin Line

Module Operating voltage : 5V Module size : 5 cm X 3.2 cm wide X 1.5 cm high Single module can drive a common cathode 8 * 8 dot matrix 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 Note: Products with electrical plugs are designed for use in the US. Outlets and voltage differ internationally and this product may require an adapter or converter for use in your destination. Please check compatibility before purchasing. Features 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 . Only one external register is used to set the segment current for each LED. A conv