Larson Scanner with Relay Module using Arduino

Arduino Larson Scanner

This time I’ll show how I used an Arduino to control a relay module with eight channels.Arduino Larson Scanner

Arduino in offers several advantages such as:

– Open source;

– Easy programming;

– You can assemble your own board;

– Is supported on various forums on the Internet;

– Has several “shields” (facilitates the use of it with sensors, for example.)

– Among others.

The idea I had was to create a simple programmable hardware. Where only would create a different software for each application.

Just as our computer. What we do (generally) is add a software The hardware remains the same.

We can control larger loads within the limits of current and voltage relays. For example, connecting a ventilator, an appliance, among others.

Step 1: Materials

Below the list of materials:

– Arduino board;

– Sensor shield;

– 8-channel relay module;

– Wires;

– 11.1V battery

Step 2: Mounting

Mount the sensor shield on Arduino Boar and connect the shield to the relay modulde following the statement below.


module ->  Shield

in1        ->  pin 13

in2        ->  pin 12

in3         -> pin 11

in4         ->  pin 10

in5         -> pin 9

in6         -> pin 8

in7         ->  pin 7

in8         -> pin 6

Take care not to invert the wires.

The battery is connected as follows: A wire was added to the negative pole connected to GND and the shield and the other of the DC relay module.

The module was connected to the wire GND which is the same shield plate Arduino.

Step 3: Connecting and Programming

Arduino Larson Scanner circuit

After assembling the hardware, just plug in and program the Arduino.

The following program was done to test the relay module. Works like the lights of the “Knight Rider”. The effect is quite interesting. Hope you enjoy.



int pinArray[] = {13, 12, 11, 10, 9, 8, 7, 6};
int count = 0;
int timer = 50;

void setup(){
for (count=0;count<7;count++) {
pinMode(pinArray[count], OUTPUT);

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