Light Intensity Meter Arduino

The output from the sensor is in lux lx and does not require advanced calculations in the sketch.

Light intensity meter arduino.

The bh1750 ambient light intensity sensor breakout board has a 16 bit a2d converter built in that can directly output a digital signal. Lux meter with arduino. It is often used by photographers to determine the proper exposure for a photograph. Arduino diy light meter with bh1750 sensor.

Ldr s light dependent resistors have a low resistance in bright light and a. Today we are going to build a simple light meter using an arduino board and a bh1750 digital light sensor. V2 is what the arduino senses. On the right of.

We need to compute r1 which will give us the light intensity in terms of v2. Building a light meter is a great learning experience. 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. 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.

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 computation is an exercise in ohm s law v ir. 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. When you finish building this project you will have a better understanding.

The design that i have chosen for the light meter is built from an arduino and associated parts. 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. 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. Since the ldr gives out an analog voltage it is connected to the analog input pin on the arduino.

Light measurement the easiest way to measure light with an arduino is with an ldr. Lx is the si derived unit of illuminance and luminous emittance measuring luminous flux per unit area in lame men s ter. The measured lighting level or intensity is displayed on eight seven segment led displays in both lux and foot candle units. It is equal to one lumen per square meter.

That is the greater the intensity of light the greater the corresponding voltage from the ldr will be.