For today s tutorial we ll be using the grove light sensor v1 2 module and an led bar to build a simple circuit that changes based on light.
Light spectrum sensor arduino.
It is most suited for arduino open source development boards.
Isl29125 sensor breakout board from sparkfun it contains few pins for biasing and communication.
Adafruit industries unique fun diy electronics and kits adafruit tsl2561 digital luminosity lux light sensor breakout id.
Otherwise you can interface with any controllers having i2c lines.
The sens 43uv analog ultraviolet light sensor module is typical of uv sensor modules.
Arduino light sensor.
This module is based on the i2c light to digital converter tsl2561 to transform light intensity to a digital signal.
With this range you can also examine very dark light sources.
By connecting a pin of the photoresistor to an analog input pin we can read the analog value from the pin and then we can know the light levels relatively.
439 the tsl2561 luminosity sensor is an advanced digital light sensor ideal for use in a wide range of light situations.
Sens 43uv analog ultraviolet light sensor module.
A buzzer is connected to pin 11 of arduino.
Different from traditional analog light sensor as grove light sensor this digital module features a selectable light spectrum range due to its dual light sensitive diodes.
The device is sensitive in the 200 370 nm range which cover most of the uva and uvb spectrum.
How to use a light sensor with arduino.
Working of arduino light sensor.
A light sensor measures the radiant energy present in the wide range of frequencies in the light spectrum.
Here s what you need.
Some of the common frequencies are infrared visible and ultraviolet.
The intensities of the pixels within the sensor values are interpolated with a straight line linear interpolation.
Grove digital light sensor.
With the 10kohm potentiometer you can change the integration time between 0 and 256 ms.
Infrared and full spectrum.
Rgb light sensor isl29125 breakout board.
Compared to low cost cds cells this sensor is more precise allowing for exact lux calculations and can be configured for different gain timing.
If bias increases than 3 3v it may hurt the sensor.
The analog input pin converts the voltage between 0v and vcc into integer values between 0 and 1023 called adc value or analog value.
An array stores all the needed pwm values to deliver the range of visible light from red to blue.
The data is output in a csv compatible form for capture in either a terminal program to import into excel or simply cut and pasted directly into excel from the arduino serial monitor screen.
It produces an analog output proportional to the amount of uv light it receives.
The arduino sketch is also similarly simple.
