Grove Color Sensor
Introduction Grove Color Sensor:
It is an updated version of Grove Light Sensor 1.0. You could use it as a light-controlled switch i.e. switch off lights during the daytime or switch on lights during night time. The resistance of the light sensor, also known as the Light Dependent Resistor (LDR) decreases when the ambient light intensity increases. However, the change in resistance due to ambient light is not linear; in low-light conditions, small changes in luminescence cause relatively large changes in resistance (or output voltage), but in well-lit conditions, changes in luminescence cause only small changes in resistance.
A dual OP-AMP chip LM358 on board produces a voltage corresponding to the intensity of light (i.e. based on the resistance value). The output signal is an analog value. The brighter the light is the larger the value will be. The output electrical signals could be converted to different ranges (It depends on the analog-to-digital converter on your controller board. For example, it could output 0-255 for an 8-bit ADC). It integrates a high-sensitive and reliable photodiode GL5528. Just like other Grove modules, you could interface this sensor with Grove port which could save a lot of work in the wiring. For all Grove users especially beginners), Seeed Studio provides guidance on PDF documents. Please download and read through Preface – Getting Started and Introduction to Grove before using the product. This is a suitable product for not only Grove users but also all electronic an enthusiasts
Spceifications:
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Supply voltage: 3.3-5VDC
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Output: 16 bit at 400kHz
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Size: 42 x 23 x 10 mm
Circuit Operation:
This is an updated version of the Grove - I2C Color of the Sensor module. The new version is based on the color of the sensor TCS34725FN with digital output I2C. We also changed the circuit layout based on the new sensor. Based on the 3*4 array of filtered photodiodes and 16-bit analog-to-digital converters, you can gain the color chromaticity of ambient light or the color of objects. Of the 16 photodiodes, four have red filters, four have green filters, four have blue filters and 4 have no filter(clear). With the synchronization input pin, the external pulsed light source can provide precise synchronous conversion control. The video shows how to recognize different colors with the sensor or then to drive the lamp lighting in blue, green, yellow, orange, or red accordingly.
This module is based on the color of the sensor TCS3414CS with digital output I2C. Based on the 82 arrays of filtered photodiodes and 16-bit analog-to-digital converters, you could gain the color chromaticity of ambient light or the color of objects. Of the 16 photodiodes, four have red filters, fourhave green filters, four have blue filters and 4 have no filter(clear). With the synchronization input pin, the external pulsed light source can provide precise synchronous conversion control.FeaturesGrove compatible interface 16-bit digital output with I 2C at 400 kHz SYNC Input Synchronizes Integration Cycle to Modulated Light Sources Operating temperature range -40°C to 85°C Programmable interrupt function with User-Defined Upper or lower threshold settings.
This product would be covered with a standard warranty of 30 Days from the time of delivery against manufacturing defects only. Refunds and replacements would be done against manufacturing defects. Warranty Voids if the product is misused, tampered with, static discharge, physical damage and burnt, water damage, use of chemicals & soldered or altered in any way.
This module is based on the color of the sensor TCS3414CS with digital output I2C. Based on the 82 arrays of filtered photodiodes and 16-bit analog-to-digital converters, you can gain the color chromaticity of ambient light or the color of objects. Of the 16 photodiodes, four have red filters, four have green filters, 4 have blue filters and four have no filter(clear). With the synchronization input pin, the external pulsed light source can provide precise synchronous conversion control.
color measurements have traditionally been linked to expensive or difficult-to-handle equipment. The set of mathematical transformations that are needed to transfer a color that we observe in any object that doesn't emit its own light (which is usually called a color object) so that it can be displayed on a computer screen or printed on paper is not at all trivial. This usually requires a thorough knowledge of color spaces, colorimetric transformations, or color management systems. The TCS3414CS color sensor (I2C Sensor Color Grove), a system for capturing, processing, and color management that allows the colors of any non-self-luminous object using low-cost hardware based on Arduino, is presented in this paper. Specific software has been developed in Matlab and a study of the linearity of chromatic channels or accuracy of color measurements for this device has been undertaken. All used scripts (Arduino and Matlab) are attached as supplementary material. The results show acceptable accuracy values that, although obviously do not reach the levels obtained with the other scientific instruments that for the price difference present a good low-cost option.
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How the Grove Color Sensor Work:
A color sensor is a type of "photoelectric sensor" which emits light from a transmitter, or then detects the light reflected back from the detection object with a receiver. The Color sensor uses reflected light to detect an object's color, hue value, grayscale value, brightness, and proximity. The VEX IQ Color Sensor is included in the VEX IQ Super Kit and can also be purchased here.
The TCS3472 device provides a digital return of red, green, blue (RGB), or clear light sensing values. An IR blocking filter, integrated on-chip or localized to the color-sensing photodiodes, minimizes the IR spectral component of the incoming light or allows color measurements to be made accurately.
RGB (red, green, or blue) refers to a system representing the colors used on a digital display screen. Red, green, or blue could be combined in various proportions to obtain any color in the visible spectrum. The RGB model uses 8 bits each -- from 0 to 23 -- for red, green, and blue colors. A True Color of the sensor in identical conditions achieved average accuracies of ?E00 = 1.57. An advantage of multi-spectral sensors is their greater accuracy or the scope that they provide to use spectral approximation methods.
Frequently Asked Questions
What is the role of color sensors in robotics?
The Modern Robotics Color Sensor detects the color of an object using reflected light or the color of light from an external light source. Great for detecting or tracking colored lines or determining the color of a lit object.
What is the output of the color sensor?
The color Sensor outputs a square wave (50% duty cycle) with a frequency corresponding to light intensity and color, the frequency is directly proportional to light intensity. The typical output of the frequency of TCS3200D is in a range of 2Hz to 500KHz.
Why color calibration?
Color calibration, also known as display or monitor calibration, is the process of fixing your screen so it can show colors more accurately. If you ever order an article of clothing online or feel like the color doesn't quite match what you saw on your screen, it is likely an issue with how your monitor is calibrated.
What is the best color calibration setting?
If you're working with video on an LCD monitor, the recommended white point is 6500K or D65. This is also known as the native of the temperature of your monitor. If you are working with the still images that you plan to print the white point of 5000K (D50) is recommended as it looks more like white on paper.
Why color analysis?
Personal color analysis can help you determine which colors flatter you the most based on your natural features. There are multiple ways to get your color analysis you could hire a professional color analyst, take a self-guided color analysis quiz, and use an app - but the core process is generally the same.
