A frequency measurement tool or better known as frequency meter can be easily created
using the Arduino. In fact, you simply take the time 5 minutes only to make it.
The materials required just Arduino
board and a little jumper cable for the experiment. Great if you have a
Frequency Generator create test the tool.
First, please download the frequency meter library here
http://interface.khm.de/wp-content/uploads/2009/01/FreqCounter_1_12.zip
frequency meter. Extract the file and copy it to the folder C:\Program Files\Arduino\libraries. Next, open the Arduino IDE (download at www.arduino.cc) and
upload the following sketch to the Arduino board.
Frequency Meter Arduino Sketch
#include <FreqCounter.h>
unsigned long frq;
int cnt;
pinLed int = 13;
void setup () {
pinMode (pinLed, OUTPUT);
Serial.begin (9600); // Connect to the serial
port
Serial.println ( "Frequency Counter");
}
void loop () {
FreqCounter :: f_comp = 10; // Cal Value /
Calibrate with professional Freq Counter
FreqCounter :: start (1000); // 100 ms Gate Time
while (FreqCounter :: f_ready == 0)
frq = FreqCounter :: f_freq;
Serial.print (cnt ++);
Serial.print ( "Freq");
Serial.println (frq);
delay (500);
digitalWrite (pinLed,! digitalRead (pinLed)); //
Blink Led
}
Subsequently connect the frequency source to pin 5 Arduino
(see Arduino board then find label '5'). This pin is exclusively dedicated to
the purposes of measuring frequency when using library FreqCounter.h. You need
to note that the voltage level of the source frequency (frequency generator)
should not be more than a working voltage of 5V as Arduino’s technical specs.
Finish. Very fast, right? :D. For view the frequency
measurement results, simply open the Serial
Monitor window via Tools | Serial
Monitor menu in Arduino IDE. Then you wil read some value that corresponding
with frequency measurement. I use this simple frequency meter to measure the
frequency of electricity at home. The trick is very simple. From home
electricity socket, derived it using a 12V transformer and then rectified by a
diode just to get a half-wave rectifier. Next go to the resistor voltage
divider to get the maximum voltage level of 5V, then insert into pin 5 Arduino.
This simple circuit can also be used to test the frequency meter above if you
do not have a frequency generator. Roughly the circuit is….
Electricity Frequency Generator Driver
So, this is the end of this brief tutorial, hopefully
useful for you. It’s important to say, hat the key to the rapid manufacture in Arduino
project is the large library that spread on the internet (e.g. frequency meter
library for experiment above). You simply utilize and modify as necessary
according to the needs of your project. For beginners / students, it will be
pretty easy to learn Arduino and all of its function, and for the professionals
will accelerate target achievement of a project.
A blogger, electro-hobbyst, freelancer n technopreneur. I'm an Indonesian, I did my best to make tutorial without spelling errors, please CMIIW or if something burned your eyes..
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