Light Sensor Unit with Photo-resistance

This Light Sensor is a light-intensity sensor unit with an adjustable photo-resistor.

A photo-resistor is a light-controlled variable resistor. The resistance of a photo-resistor decreases with increasing incident light intensity and vice versa. The sensor exhibits photoconductivity which makes it possible to detect the light varies based on voltage and use an AD (Analog to digital converter) to convert the digital data.

We added some extra work to strengthen the circuit, a Dual Differential Comparators LM393, compares the differential voltage between the photo-resistor and the varistor. It could offer a larger and more accurate range of light intensity.

Features

• 10K adjustable resistor
• Software Development Platform: Arduino, UIFlow (Blocky,Python)
• Two Lego-compatible holes

Specifications

Resources	Parameter
Adjustable resistance	10K
Net weight	4g
Gross weight	17g
Product Size	32x24x8xmm
Package Size	67x53x12mm

Resources

• Product Wiki

Package Contents

• 1x Light Sensor Unit
• 1x Grove Cable