4,091

53

8

Posted

Hi,

this is my first instructable, but isn't the first Arduino project...

Let's Go...

## Step 1: Get All Needed Parts (Parts List)

1 - Arduino Uno/Nano

1 - 10k Potenciometer

Some Wires

## Step 2: Connect Wires

Connect all wires as shown in the picture...

## Step 3: Build Code

This is the code that you will use.

You will need TEA5767Radio.h library for arduino

So, the includes will be:

#include <Wire.h>
#include <math.h> //this is to round readed values

then we will declare variables:

float freq, lastfreq; //freq and lastfreq should be float because we will use decimal values in MHz
int sensorValue; // this is to read potenciometer value

Now let's setting up arduino:

void setup(){

Wire.begin();

Serial.begin(9600);

}

Then let's create our loop:

void loop() {

freq = (sensorValue * (20.5 / 1023.0))+87.5;
freq = freq*10.0f;
freq = (freq > (floor(freq)+0.5f)) ? ceil(freq) : floor(freq);
freq = freq/10.0f; //round the freq value to a 1 decimal place

if(lastfreq!=freq){

lastfreq=freq; //save frequency to check if frequency was changed
Serial.print("Frequency: ");
Serial.print(freq);
Serial.println("MHz");

}

}

## Recommendations

• ### Arduino Class

66,592 Enrolled

• ### Paper Contest 2018

We have a be nice policy.

## Questions

What is the range of frequencies that we can hear?

you want to know the range that we can hear ou we can set on this?

we can hear 20hz to 20000hz +/-

In the project we can set between 76Mhz and 108MHz

Very good project, simple and effective to start using the radio module. I suggest that you add a couple of lines to the wiring description to state that each Arduino board has different SDA and SCL pins, so if you do not use UNO (or Nano) you have to change wiring accordingly. For example MEGA has:

SDA pin 20

SCL pin 21