The LTR390 is one of the few low-cost UV sensors available, and it’s a pretty nice one! With both ambient light and UVA sensing with a peak spectral response between 300 and 350nm. You can use it for measuring how much sun you can get before needing to covering up.

Unlike the Si1145, this sensor will not give you UV Index readings. However, the Si1145 does UV Index approximations based on a light level, not true UV sensing. The LTR-390, in contrast, does have a real light sensor in the UV spectrum. It’s also got a much much simpler I2C interface so you can run it on the Arduino or Python microcontrollers/microcomputers with ease. Unlike the GUVA analog sensor, the biasing and ADC is all internal so you don’t need an ADC.

To make using it as easy as possible, we’ve put the LTR390 on a breakout PCB  in our Stemma QT form factor with a sprinkle of support circuitry to give you options when testing. You can either use a breadboard or the SparkFun qwiic compatible STEMMA QT connectors, and compatibility with 5V voltage levels as commonly found on Arduinos, as well as 3.3V logic used by many other boards like the Raspberry Pi or our Feathers.

Package Includes:

1 x Adafruit LTR390 UV Light Sensor – STEMMA QT/Qwiic

This is a color sensor module based on TCS34725, will output RGB data and light intensity through the I2C interface. Its advantages include high sensitivity, wide dynamic range, accurate measuring, etc.

Waveshare sensor allowing to detect the colours of light. It is based on the sensor TCS34725. It has the LED backlight and a built-in IR filter. It can work with any microcontroller equipped with I2C interface. It runs with the voltage from 3.3 V to 5 V.

Sensor, enabling the detection of colors from the RGB palette, equipped with a built-in IR filter that blocks unwanted components in the range of infrared radiation. To work with the sensor, applied was controlled through the transistor LED indicator, whose task is to illuminate the detected surface.

TCS34725 is used for color sensing. TCS34725 is an I2C bus-based color light-todigital converter with IR filter, provides a digital return of red, green , blue (RGB) and clear light sensing values. The high sensitivity, wide dynamic range and IR blocking filter make the TCS34725 an ideal color sensor solution for use under varying lighting conditions and through attenuating materials.

Application:

1. Sorting by color
2. Ambient light sensing and calibration
3. Products color identification and classification

Features: 

1. Onboard TCS34725FN, embedded ADC, high sensitivity, wide dynamic range
2. I2C communication uses a few pins
3. Integrates IR blocking filter, minimizes the IR spectral component of the incoming light
4. Outputs RGB data without white balance
5. Outputs light intensity, feel the light like human eyes
6. Supports light intensity interrupt output, programmable upper and lower thresholds
7. Supports fill-light by onboard LED, adjustable brightness by PWM
8. Onboard voltage level translator, compatible with 3.3V/5V operating voltage
9. Comes with development resources and manual (examples for Raspberry Pi/Arduino/STM32)

Specification:

1. Sensor: TCS34725FN
2. Communication interface: I2C
3. Operating voltage: 3.3V/5V
4. Dimension: 27mm × 20mm
5. Resolution: 4-ch RGBC, 16-bit per ch
6. Recommended measuring distance: 2mm

Package Includes:

1 x TCS34725 Color Sensor
1 x PH2.0 6PIN wire 20cm

COLOR is color recognition unit integrated with TCS3472 chipset. As the name says, COLOR is able to detect color value and return RGB data as response.

Identify color principle: The TCS3472 chipset integrated with 3 x 4 array of filtered photodiodes and a 16 bit analog-to-digital embedded converters. Out of the 12 photodiodes, 3 have red filters, 3 have green filters, 3 have blue filters and 3 have no filter (clear), which gives a total range of RGBA (RGB + Transparency)

Application:

1. Product Color Verification
2. Color tracking robot

Arduino:

To get the complete code, please click here

Features:

1. Detection range: -40℃~85℃
2. GROVE interface, support UI Flow and Arduino
3. Two Lego-compatible holes
4. This Unit communicates with the M5Core via the GROVE A interface(I2C). Address is 0x29

Packages Includes:

1 x M5Stack Color Sensor RGB Unit (TCS3472)

BH1745NUC is digital color sensor IC with I2C bus interface. This IC senses Red, Green and Blue light (RGB) and converts them to digital values. The high sensitivity, wide dynamic range and excellent Ircut characteristics makes this IC the most suitable to obtain the illuminance and color temperature of ambient light for adjusting LCD backlight of TV, mobile phone and
tablet PC. It is possible to detect very wide range light intensity. (0.005 – 40k lx)

Applications:

1. LCD TV
2. Mobile phone
3. NOTE PC
4. Tablet PC
5. Portable
6. game machine
7. Digital camera
8. Digital video camera
9. PDA
10. LCD display

Features: 

1. The Excellent Ircut Characteristics with an Ircut Filter
2. The High Sensitivity and Wide Dynamic Range (0.005 – 40k lx)
3.  Supports Low Transmittance (Dark) Window
4. Correspond to I2C Bus Interface ( f/s mode support )
5. Low Current by Power Down Function
6. Rejecting 50Hz/60Hz Light Noise
7. Correspond to 1.8V Logic Interface
8. Programmable Interrupt Function
9. It is possible to select 2 type of I2C bus slave address (ADDR =’L’: “0111000”, ADDR =’H’: “0111001”)

Packages Includes:

1 x PIMORONI BH1745 Luminance and Colour Sensor Breakout

V Sensor (C) is an I2C digital UV sensor expansion board equipped with LTR390-UV-01, which can be used to measure UV and human visible light and can output light intensity data. UV Sensor (C) has the characteristics of sensitive sensing, fast response and small size. Its core sensor LTR390-UV-01 is integrated on a 27 × 20mm expansion board, which can be easily integrated into the device.

Features: 

1. Using LTR390-UV-01, can measure ultraviolet and visible light of human eye
2. Built-in ADC, can directly output light intensity through I2C interface, not easy to be disturbed by noise
3. With interrupt output and programmable upper and lower thresholds
4. On-board level conversion circuit, compatible with 3.3V/5V working level
5. Provide complete supporting information manual (Raspberry/Arduino/STM32 sample program and user manual, etc.)

Application:

1. Ultraviolet tester
2. Outdoor ultraviolet detector
3. Germicidal lamp

Package Includes:

1 x UV Sensor (C)
1 x PH2.0 5PIN wire