Light Intensity Meter Arduino

Lux meter with arduino.

Light intensity meter arduino.

The output from the sensor is in lux lx and does not require advanced calculations in the sketch. The ldr gives out an analog voltage when connected to vcc 5v which varies in magnitude in direct proportion to the input light intensity on it. The computation is an exercise in ohm s law v ir. When you finish building this project you will have a better understanding of how light meters work and you are going to see in action how powerful the arduino platform can be.

That is the greater the intensity of light the greater the corresponding voltage from the ldr will be. Arduino diy light meter with bh1750 sensor. Building a light meter is a great learning experience. Ldr s light dependent resistors have a low resistance in bright light and a.

It is equal to one lumen per square meter. In this instructable i am going to show you how to build a light meter with a big nokia 5110 lcd display using arduino building a light meter is a great learning experience. Today we are going to build a simple light meter using an arduino board and a bh1750 digital light sensor. The bh1750 ambient light intensity sensor breakout board has a 16 bit a2d converter built in that can directly output a digital signal.

When you finish building this project you will have a better understanding. It is often used by photographers to determine the proper exposure for a photograph. In this tutorial i am going to show you how to build a light meter with a big nokia 5110 lcd display using arduino. The bh1750 communicates using i2c protocol.

Lx is the si derived unit of illuminance and luminous emittance measuring luminous flux per unit area in lame men s ter. The design that i have chosen for the light meter is built from an arduino and associated parts. Project design a luxmeter using a light dependent resistor december 13 2015 by david williams take a few minutes to characterize a light dependent resistor ldr and you can build a simple and reasonably accurate light meter can be built using an ldr and an arduino. We need to compute r1 which will give us the light intensity in terms of v2.

Since the ldr gives out an analog voltage it is connected to the analog input pin on the arduino. On the right of. In photometry this is used as a measure of the intensity as perceived by the human eye of light that hits or passes through a surface. V2 is what the arduino senses.

A lux meter also known as a light meter a light meter is a device used tomeasure the amount of light lux the lux symbol.