The TSC230/3200 is Programmable Color Light-to-Frequency Converter Module, which we have in stock about a week. It can be controlled in many ways, one of which is Arduino. We tried and tested it, then made a demo. Let’s see how it works with Arduino.
First of all, of course material preparation. The ChipKit which you need one of Arduino main board and some of F/F jumper wire(3 pin & 4 pin &5 pin) andTSC230 Color Snsor Module. From now on, we provide two types of the TSC230 module with different layout. Here we use the white Color Sensor Module for the demo.
The module works at 5V, you can use Arduino for power supply directly. The White Color Sensor has shorted LED to GND by a short circuit Block Cap. The four white highlight LEDs in the surrounding are providing a source constant light.
The Demo pins to Arduino as below:
GND & LED – GND , OE – GND, VCC – VCC, S0 – D6, S1 – D5, S2 – D4, S3 – D3, OUT – D2
#define S0 6
#define S1 5
#define S2 4
#define S3 3
#define OUT 2
Here OE connects to GND that means the module was always enable. The OUT(Signal pin) is output of a square wave (50% duty cycle) with frequency directly proportional to light intensity (irradiance). Most Arduino boards have two external interrupts: numbers 0 (on digital pin 2) and 1 (on digital pin 3). So we connect OUT to D2 for counting the square wave frequency using external interrupt 0.
So you need an other timer library which is a collection of routines for configuring the 16 bit hardware timer called Timer1 on the ATmega168/328 . Get the Timer1 Library.
The initialization function of the demo as below:
// Init TSC230 and setting Frequency.
void TSC_Init()
{
pinMode(S0, OUTPUT);
pinMode(S1, OUTPUT);
pinMode(S2, OUTPUT);
pinMode(S3, OUTPUT);
pinMode(OUT, INPUT);
digitalWrite(S0, LOW); // OUTPUT FREQUENCY SCALING 2%
digitalWrite(S1, HIGH);
}
The S0, S1 is output frequency scaling selection inputs. S0 – L & S1 – H is output frequency scaling to 2%. The reason of setting the scale factor is adapt to the different measurement range and improve the measurement ability with different MCU. The S2, S3 control the filter of RGB.
Then is the important part of the demo code – Adjust the WB(white balance) .
// Select the filter color
void TSC_FilterColor(int Level01, int Level02)
{
if(Level01 != 0)
Level01 = HIGH;
if(Level02 != 0)
Level02 = HIGH;
digitalWrite(S2, Level01);
digitalWrite(S3, Level02);
}
void TSC_Count()
{
g_count ++ ;
}
void TSC_Callback()
{
switch(g_flag)
{
case 0:
Serial.println("->WB Start");
TSC_WB(LOW, LOW); //Filter without Red
break;
case 1:
Serial.print("->Frequency R=");
Serial.println(g_count);
g_array[0] = g_count;
TSC_WB(HIGH, HIGH); //Filter without Green
break;
case 2:
Serial.print("->Frequency B=");
Serial.println(g_count);
g_array[1] = g_count;
TSC_WB(LOW, HIGH); //Filter without Blue
break;
case 3:
Serial.print("->Frequency G=");
Serial.println(g_count);
Serial.println("->WB End");
g_array[2] = g_count;
TSC_WB(HIGH, LOW); //Clear(no filter)
break;
default:
g_count = 0;
break;
}
}
void TSC_WB(int Level0, int Level1) //White Balance
{
g_count = 0;
g_flag ++;
TSC_FilterColor(Level0, Level1);
Timer1.setPeriod(1000000); // set 1s period
}
void setup()
{
TSC_Init();
Serial.begin(9600);
Timer1.initialize(); // defaulte is 1s
Timer1.attachInterrupt(TSC_Callback);
attachInterrupt(0, TSC_Count, RISING);
delay(4000);
for(int i=0; i<3; i++)
Serial.println(g_array[i]);
g_SF[0] = 255.0/ g_array[0]; //R Scale factor
g_SF[1] = 255.0/ g_array[1] ; //G Scale factor
g_SF[2] = 255.0/ g_array[2] ; //B Scale factor
Serial.println(g_SF[0]);
Serial.println(g_SF[1]);
Serial.println(g_SF[2]);
}
WB is to tell the system what is white. In theory, composed of equal amounts of RGB is white, but in fact RGB component values are not equal. For TSC230 module the sensitivity of the three light is different, which leading to RGB value different. So before you use it must be adjusted WB.
The method of adjust the WB is in a fixed time(here used 1S) statistics RGB component’s pulses, then calculate a scale factor, this scale factor can be transformed the pulses count to 255. In the actual test, we calculate the number of pulses at same fixed time and multiply by the scaling factor and then get the object’s RGB values.
Here we use the Timer1 library to set a callback function – void TSC_Callback() , for getting the RGB value. Pin D2(OUT) count the trigger when the pin goes from low to high: attachInterrupt(0, TSC_Count, RISING); At last, save the RGB value to g_array[] and calculate out the scale factor save to g_SF[].
Note: The first use or restart or change light and so on, please adjust the WB(White Balance) again.
OK, Now we can test the light color from the demo code and print out the RGB value.
void loop()
{
g_flag = 0;
for(int i=0; i<3; i++)
Serial.println(int(g_array[i] * g_SF[i]));
delay(4000);
}
First, after we have did all of previous. The result of the monitor as below:
As the figure, the mark 1 is the RGB value at 1S period. The RGB value is Red=1126 , Green=707 and Blue =774. Then the mark 2 is the scale factor. Then use the scale factor for adjusting the RGB value to 255 as Mark 3.
Then we measure objects in color, keep the objects on the module top 3s and the result from monitor as below:
As the figure, the Mark 4 is object’s RGB value. Now you have got the RGB value it means you have got the object color.
Left is your own personal test and enjoy it. This file is a sample code for your reference.Just a demo for TSC230 Programmable Color Light-to-Frequency Converter Module. Thank you very much.
Download the TCS230 Demo for Arduino
Hi, i have a problem, serial port shows me
0
0
0
->WB Start
->Frequency R=0
->Frequency G=0
->Frequency B=0
->WB End
Is it problem that i am using a little bit different sensor TSC230?
http://tx.lt/379-large_default/color-sensor-tsc230.jpg
Any idea where the problem is? thank you,
Hi, am I missing some `g_count` `g_flag` and `g_array` declarations? Example code in the link is totally different from this code.
Do you mind if I quote a couple of your articles as long as I provide credit and
sources back to your site? My blog is in the exact same niche
as yours and my users would truly benefit from a lot of
the information you present here. Please let me know if this ok with you.
Appreciate it!
Here is my webpage: google.ca (Bryan)
Hi Bryan,
Thanks for your interest. Will contact you via email.
But, the techniques for glass making are still almost the same as when Murano
artisans invented them through the last ten centuries.
This season, large, dangling earrings are the most
popular earring styles. When police confiscate goods from their store, the only option they
have in getting their money back for the item is to attach
themselves to the suit against person who stole the item and sold it to them.
Here is my web blog :: fashion jewelry (Stephany)
Has anyone actually tried to run this code or the download demo? Didn’t think so.. I did and none of it actually works.
Thanks anyway for some explanations – perhaps just taken from elsewhere but with only partial understanding.
I will get this to work myself.
Resale of the improved property could also need certain
periods to lapse. Inventory finance would require no real estate security and neither will it count
against your credit line. If you can negotiate the lowest
price and get zero percent financing on it, than you possess a deal that is
worth your pursuing.
Pretty useful, I wish I could get more line of depth as when trying to grab the RGB value from over 20 feet away the data is way off.
Your mode of explaining the whole thing in this paragraph is in fact
fastidious, every one be able to effortlessly be aware of it, Thanks
a lot.
I’m really impressed with your writing skills and also with the layout on your weblog. Is this a paid theme or did you modify it yourself? Anyway keep up the excellent quality writing, it is rare to see a nice blog like this one today.
Nice blog right here! Also your website lots up fast! What
host are you the use of? Can I get your associate hyperlink in your host?
I desire my website loaded up as fast as
yours lol
It’s a shame you don’t have a donate button!
I’d certainly donate to this brilliant blog! I guess for now i’ll settle for book-marking and adding your RSS feed to my Google
account. I look forward to brand new updates and will share
this blog with my Facebook group. Talk soon!
Mea. Kingdom: Animalia. The funny thing about working with i – Work.
I read this paragraph fully about the comparison of hottest and previous
technologies, it’s amazing article.
The exact characteristics can be determined in later steps if not known.
Sure, the companies running those social media sites feel
they have control ‘ much the same way a race driver feels he has control of a car barreling down a track at over 200 mph. You can also use the travel charger included in the kit while travelling and enjoy music in your car with the help of USB car charger.
thanks a lot for the code but can u tell how i can turn off the leds when not needed?
also the display is having a 1 sec delay rt?
im using the color sensor to follow a rc race track, so basically i need to get the values at a faster rate , can u tell me how?
thanks a lot for the code but can u tell how i can turn off the leds when not needed?
also the display is having a 1 sec delay rt?
im using the color sensor to follow a rc race track, so should detect white color and yellow color lines and move away from it as required, but if there is a 1s delay for this color sensing alone the rc is not efficient enought, coz it has to control the servo and check the value from US distance senso,
basically i need to get the values at a faster rate , can u tell me how?
I also need a fast response time (in microseconds). help me!
I have the same question to Denorro Stallworth
What is the math you are using to go from the frequency to get the rgb value? I see you have a frequency of 1126 for red, then some value of 0.23, then all of suddent you have 255 or the r value of rgb. So what equation did you use to get the 255 for r?
For instance you have:
Frequency r = 1126,g=774,b=707
.23 , .33 , .36
Then all of sudden you have: 255, 255, 254 (how did you get these #’s)