Arduino Max7219 Scrolling Text Download Files And

Hardware Required: Arduino HC-SR501 PIR 5V 1 Way Relay Buzzer Lamp Breadboard Jumper Wires Project circuit: Project circuit diagram is shown below.

An LED matrix may be a combination of 64 LEDs connected together as shown within the following circuit.

As Arduino doesnt have 64 pins, we will not connect individual pins to regulate each LED.

Instead, well use the concept of multiplexing: With the use of multiplexing, we can control any number of LEDs with Arduino.

For controlling an 8 x 8 LED matrix, we need one multiplexer circuit.

We can use the backpack from adafruit for the multiplexer, or a MAX7219 Dot Matrix MCU Control for the multiplexer part: So, now we do not need to use a lot of pins to control this LED matrix.

Instead, we require only four pins to control this LED matrix.

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Arduino Max7219 Scrolling Text Download Files And

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