Light Intensity Meter Circuit Diagram

This diagram illustrates wiring for one switch to control 2 or more lights.

Light intensity meter circuit diagram. Figure 3 the full circuit diagram. It is equal to one lumen per square meter. When you finish building this project you will have a better understanding. The circuit is using a 0 to 10 volt analog meter.

The circuit uses a p n photodiode as the light sensor and a display driver ic lm3915 ic1 to give a logarithmic current scale linearly with the incident light energy. Night sensing light block diagram. Ldr s light dependent resistors have a low resistance in bright light and a. The hot and neutral terminals on each fixture are spliced with a pigtail to the circuit wires which then continue on to the next light.

Arduino diy light meter with bh1750 sensor. The light dependent resistor ldr is used as a light sensor in the circuit which automatically turn on off the light without any support of human. The circuit will show visual indication of light intensity with leds. Complete light meter circuit idea using a diode.

If single power supply can use voltage 6 30v but dual types is 3 15v. The source is at sw1 and 2 wire cable runs from there to the fixtures. The night sensing light circuit will operate the light based on the light intensity falling on the sensor used in the circuit. If need to measure a lower brightness may add offset adjusting of op amp and change the power supply is positive negative types.

Circuit for light intensity measurement circuit for light intensity measurement. The circuit can be used for many other varieties of light intensity measurement purposes like solar experiments etc. 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 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 next diagram shows how the drawback could be tackled through a sensitive precision light activated circuit that would work without getting affected from voltage or temperature variations. This is an essential project for electronics lab to measure the light intensity of different leds lasers and other light bulbs. The circuit is very simple and handy using only few components which are an ldr variable resistor transistor and meter. Multiple light wiring diagram.