MAX7219 LED Dot Matrix Display Module Kit with Dupont Cables for MCU Control
MAX7219 LED Dot Matrix Display Module Kit with Dupont Cables for MCU Control
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$2.49 USD
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Product Details:
Specifications:
- Drives an 8 x 8 common cathode lattice
- Operating Voltage: 5V
- Dimensions: 5 x 3.2 x 1.5 cm (L x W x H)
- LED Color: Red
- Four mounting holes with 3mm aperture
- Includes input and output interfaces; supports cascading multiple modules
Wiring Instructions:
- The left side of the module is the input port; the right side is the output port.
- To control a single module, connect the input port to the CPU.
- For multiple modules in a cascade, connect:
- First module's input port to the CPU
- First module's output port to the input port of the second module, and so on.
Connections for 51 MCU:
- VCC → 5V
- GND → GND
- DIN → P22
- CS → P21
- CLK → P20
Important Notes:
- Ensure VCC and GND are not reversed to avoid damaging the chip.
- If using a 51 microcontroller P0 port, connect a pull-up resistor (recommended: 4.7K–10K).
- Install the lattice first into the round hole, then into the PCB board, and solder it. Align the lattice face with words from left to right with pin order 123456; PCB board's 1st pin is a square pad.
- For electrolytic capacitors, the long pin is positive, and the short pin is negative. Ceramic capacitors have no polarity.
Package Includes:
- 1 x LED module
- 5 x Dupont lines (20cm each)