Light Intensity Data

Project Description

Project Subsystems

System Diagram

Size: 60mm * 70mm * 10mm

- Develop a compact light intensity

recording device that takes samples

every minute.

1 Year Field life

User Interface

Product Requirements

- Small Size

- Cost Effective

- Low Power Consumption

- Accurate Data

- Graphical Display of Data

- In order to capture

low angle light, a dome

was used as a

Lambertian surface.

Lambert’s cosine law

states that the luminous

intensity of an object is

proportional to the

incident angle of light.

Microcontroller

- The light sensor is built using a transimpedance

amplifying circuit. The circuit uses three scaled resister

values that correlate to specific lux ranges. The

resistors are scaled to produce a series of gain arrays

that allow the microcontroller the ability to measure the

entire light intensity range of the sun.

&

Cloudy day

Sunny day

Partly cloudy day

Light Trap-404

Memory & Power

Light Sensor Dome

Group Members

Kent Gerber Brown Mattox

Ian McIlrath Alden Theuerl