Light Intensity Meter Arduino

The bh1750 communicates using i2c protocol.

Light intensity meter arduino.

Since the ldr gives out an analog voltage it is connected to the analog input pin on the arduino. It is often used by photographers to determine the proper exposure for a photograph. We need to compute r1 which will give us the light intensity in terms of v2. It is equal to one lumen per square meter.

The measured lighting level or intensity is displayed on eight seven segment led displays in both lux and foot candle units. The output from the sensor is in lux lx and does not require advanced calculations in the sketch. Arduino diy light meter with bh1750 sensor. V2 is what the arduino senses.

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. Building a light meter is a great learning experience. Lx is the si derived unit of illuminance and luminous emittance measuring luminous flux per unit area in lame men s ter.

On the right of. 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. Ldr s light dependent resistors have a low resistance in bright light and a. 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.

In this tutorial i am going to show you how to build a light meter with a big nokia 5110 lcd display using arduino. That is the greater the intensity of light the greater the corresponding voltage from the ldr will be. The computation is an exercise in ohm s law v ir. This year we will investigate light conditions to try to find insight into how light intensity affects not just our plants but also our own lives and those of our communities.

The bh1750 ambient light intensity sensor breakout board has a 16 bit a2d converter built in that can directly output a digital signal. 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. Light measurement the easiest way to measure light with an arduino is with an ldr. 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.