Color Sensor User Manual
Contents
1. Color Sensor User Manual Waveshare Color Sensor User Manual 1 Features Sensing chip TCS3200 full color detector Identification type Static identification Dimensions 36 0mm 20 5mm Fixing hole size 2 0mm Best detecting distance 10mm Table 1 Product features Operating principle The functional block diagram of TCS3200D is shown in the figure below I Photodiode Current to Frequency Array Converter S2 S3 so Si OE TCS3200D contains four types of filters red filter green filter blue filter and clear with no filter When the sensor is illuminated by a ray of light the types of filters blue green red or clear used by the device can be selected by two logic inputs S2 and S3 Table 2 illustrates the relationship among S2 S3 and filter type S2 S3 Filter type L L Red L H Blue H L Clear no filter H H Green Table 2 Relationship among S2 S3 and filter type TCS3200D outputs a square wave 50 duty cycle with frequency corresponding to light intensity and color and the frequency is directly proportional to light intensity The typical output frequency of TCS3200D is in arange of 2Hz to 500KHz User can control frequency values of 100 20 and 2 by two programmable outputs SO and S1 as Table 3 shown Color Sensor User Manual Waveshare So S1 Output Frequency Scaling L L Power down L H 2 H L 20 H H 100 Table 3 Re2. fect the result of color identification It is recommended to place the light source and Color Sensor in a close light reflection free box for testing 2 White balance adjustment is required whenever Color Sensor module is reset or light source is changed
3. lationship among S0 S1 and output frequency scaling TCS3200D has different sensitivities to red green and blue As a result the RGB output of pure white is not always 255 Therefore white balance adjustment is required after power up within 2 seconds Here are the processes Place a white paper at the top of the sensor in a distance of 1cm and input a High level voltage to LED port to light up 4 bright white LED indicators 2 The program selects R G and B filters respectively and measures the corresponding RGB values of red green and blue Calculate 3 adjustment parameters corresponding to red green and blue respectively and perform automatic white balance adjustment 2 Applications This module can be applied to color sorting environmental light induction and calibration test strip reading color matching test etc 3 Interfaces Pin No Symbol Descriptions 1 LED Control the states of 4 LED indicators 2 OUT Read the output frequency of RGB Combined with S2 select filters for different 3 S3 color lights Combined with S3 select filters for different 4 S2 l color lights 5 S1 Combined with S0 select output frequency scaling 6 so Combined with S1 select output frequency scaling 7 GND Power ground 8 VCC Positive power supply 2 7V 5 5V Table 4 Interface specifications Color Sensor User Manual Waveshare 4 How to use We will illustrate the usage of the m
4. odule with an example of color identification by connecting a development board Download relative codes to the development board The configuration of the connection between the module and the development board are shown in Table 5 and Table 6 Port STM32 MCU pin LED 3 3V OUT GPIOA 0 S3 GPIOA 4 S2 GPIOA 3 S1 NC SO NC GND GND VCC 3 3V Table 5 Connection between STM32 development board and the module Port Arduino pin LED 3 3V OUT D2 3 D3 S2 D4 S1 D5 So D6 GND GND VCC 5V Table 6 Connection between Arduino and the module The configuration of the serial port is listed in Table 7 Baud rate 115200 Data bits 8 Stop bit 1 Parity bit None Table 7 Serial port configuration 2 Place a white paper at the top of the sensor in a distance of 1cm 8 Power up the development board and input a High level to LED port to light up 4 bright white LED indicators Color Sensor User Manual Waveshare 4 Wait for 2 seconds or more after power up automatic white adjustment is conducted during this period After the adjustment completed place an objective to be measured at the front side of the sensor Then you can see relative data of RGB are outputted A color check list is helpful for finding out what the measured color it is 5 Considerations Light interference from outside should be avoided which may af
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