Summary of THIS ARDUINO ISN’T COLOR BLIND
This article describes a project using an Arduino and TCS230 color sensor to detect colors. The system displays the detected color and illuminates an RGB LED to match it. The TCS230 chip uses a 4x4 array of photodiodes with a Bayer filter for red, green, blue, and unfiltered light detection. The Arduino reads the frequency output from selected detectors to determine color intensity. While resolution is limited, the sensor is simple and effective for basic color matching tasks.
Parts used in the Color Sensing Project:
- TCS230 color sensor
- Arduino controlling chip
- RGB LED
- 4 x 4 array of photodiodes
- Bayer filter
You can sense a lot of things with the right sensor, and [Nikhil Nailwal] is here to show us how to sense colors using a TCS230. The project is a simple demo. It displays the color and lights up an LED to correspond to the detected color.
If you haven’t seen the TCS230 before, it is a chip with an array of photosensors, for different light wavelengths. The controlling chip — an Arduino, in this case — can read the intensity of the selected color.
The TCS230 uses a 4 x 4 array of photodiodes, along with a Bayer filter. That is, there are four detectors for red, four for green, and four for blue. There are also four unfiltered detectors that aid in low lighting detection.
The host computer controls two lines to select which group of four detectors to read. The output is a frequency from around 2 to 500 kHz that indicates the intensity. You can scale the output frequency if you don’t want to deal with higher frequencies.
From what we understand, the sensor’s resolution isn’t that great. But for simple color detection, it is easy to use and effective. There are very similar chips like the TCS3200 that have more sensors, but work in the same way.
We’ve seen similar projects, but we are always struck how simple this sensor is to use. Combine these with an RGB LED and you can make a chameleon.
Source: THIS ARDUINO ISN’T COLOR BLIND
- What components are needed to sense colors?
An Arduino controlling chip and a TCS230 sensor are required. - How does the TCS230 detect different wavelengths?
It uses a 4 x 4 array of photodiodes along with a Bayer filter containing four detectors each for red, green, and blue. - Can you scale the output frequency?
Yes, you can scale the output frequency if you do not want to deal with higher frequencies. - What is the frequency range of the TCS230 output?
The output is a frequency ranging from around 2 to 500 kHz that indicates intensity. - Does the TCS230 have unfiltered detectors?
Yes, there are four unfiltered detectors that aid in low lighting detection. - Is there a similar chip to the TCS230?
The TCS3200 is a similar chip that has more sensors but works in the same way. - What is the resolution like on this sensor?
The sensor's resolution is not that great but it is easy to use and effective for simple color detection. - What happens when the sensor detects a color?
The project displays the color and lights up an LED to correspond to the detected color.
