Introduction

This light sensor, based on environmentally friendly PT550 photodiode, can be used to detect the intensity of the ambient light by converting optical signals to electrical signals with photodiode. It features analog voltage output that is directly proportional to the ambient light. Besides, the sensor works well with maincontrollers such as micro:bit and Arduino, suitable for not only Mind+ and makecode graphical programming but also non-programming projects.

Specification

Operating Voltage: 3V-5V
Interface Type: PH2.0-3P
Dimension: 26mm×39mm/1.02×1.54"
Signal Type: analog signal

Pinout

NO.	Label	Description
1	GND	Power -
2	VCC	Power +
3	SIGNAL	Analog Signal Line

Usage Description

The light-sensitive components on the light sensor can detect the intensity of ambient light so we can use it to make light interactive applications.

Working Principle

Light sensors are mainly composed of light-sensitive components. This sensor employs environmentally friendly PT550 photodiode, which can detect the ambient light in the environment and output corresponding voltage according to the intensity of light. The voltage is directly proportional to the light intensity.

Application

1.Light Intensity Detector

Description:

Detect light intensity with this light sensor, and display the test result.

Components:


BOS0004 Light Sensor	BOS0035 Mainboard-3IO	BOS0044 OLED Module

MBT0039 Micro:bit	BOS0040 Micro:bit BOSON Expansion Board

Tips: micro:bit and Micro:bit BOSON expansion boards are used in the programming example.

Non-programming Sample

Connection Diagram:

Programming Sample

Connection Diagram:

Flow Chart:

Mind+ Sample Program:

Makecode Sample Program:

Demo Videos:

Non-programming	Programming

2.Music Box

Description:

The light sensor can measure the light intensity. We take the music box to a dark place, when the sensor senses the darkness, the box lights up and the buzzer starts to sing.

Components:


BOS0004 Light Sensor	BOS0020 Buzzer Module	BOS0030 Splitter Module

BOS0019 Multicolor String Light	BOS0035 Mainboard-3IO	MBT0039 Micro:bit

BOS0040 Micro:bit BOSON Expansion Board

Tips: micro:bit and Micro:bit BOSON expansion boards are used in the programming example.

Non-programming Sample

Connection Diagram:

Programming Sample

Connection Diagram:

Flow Chart:

Mind+ Sample Program:

Makecode Sample Program:

Demo Videos:

Non-programming	Programming

3.Smart Streetlights

Description:

After connecting the modules according to the connection diagram below, the setup works in this way: the streetlight will light up only when having detected there are passersby at night. This design greatly saves power resources.

Components:


BOS0004 Light Sensor	BOS0009 Sound Sensor	BOS0017 LED Module

BOS0027 Logic Module-AND	BOS0028 Logic Module-OR	BOS0035 Mainboard-3IO

MBT0039 Micro:bit	BOS0040 Micro:bit BOSON Expansion Board