SKU_BOS0008_Boson_Touch_Sensor

Introduction

This capacitive sensing-based touch switch detects direct pysical touch on metal surface or touch through a certain thickness of plastic, glass and other materials. The sensitivity is related to the size of the metal surface and the thickness of the covering material. Please note that the module needs to be at a certain height from the desktop in use(related to the desktop material).

With the copper foil self-adhesive, it can be easily pasted to the door or glass. Users can combine it with the Arduino sensor expansion board to make interesting touch interactive works.

Note: This touch sensor requires users to connect and solder the copper foil sensor plate and the sensor board according to their own needs.

Specification

Working Voltage: 3V-5V
Interface Mode: PH2.0-3P
Product Size: 22×26(mm)/0.87×1.02 inch
Signal Type: 0 or 1

Board Overview

Pinout

Num	Label	Description
1	GND	Power -
2	VCC	Power +
3	Signal	Signal Line(Digital)

Usage Description

The components on the touch sensor can sense whether the object is in contact with the sensor, and can be used to make human touch-based interactive project. It can be used with maincontroller like Arduino, micro:bit, etc. And more possibilities can be found in both non-programming or programming(MakeCode or Mind+) projects.

When a finger touches the metal surface on the touch sensor, the touch sensor outputs a high level, otherwise, it outputs low level.

Principle

This is a capacitive sensing-based touch sensor. When the human body directly touches the metal surface on the sensor, the electric field of the human body forms a coupling capacitor between the human finger and the working surface, and the coupling capacitance can be sensed. It can detect the touch of a finger through insulating masterial (glass, plastic, etc.) shell with thickness above 20mm.

Application

Touch-controlled Fan

Description: The fan starts to rotate when the touch sensor detects a touch.

Components:


BOS0008 Touch Sensor	BOS0021 Fan Module	BOS0035 Mainboard-3IO

MBT0039 micro:bit	BOS0040 micro:bit BOSON Expansion Board

Tip: micro:bit and the expansion board will be used in programming projects.

Non-programming Project

Connection Diagram：

Connection 1

Programming Project

Connection Diagram：

Connection 2

Program Flowchart:

Flowchart 1

Mind+ Sample Code:

MakeCode Sample Code:

Video Demo

Non-programming	Programming

Burglar Alarm for Art Gallery

Description: When someone touches the exhibit or the exhibit is tilted, it makes sound to alarm.

Components:


BOS0005 Tilt Sensor	Buzzer Module	Touch Sensor

BOS0035 Mainboard-3IO	BOS0028 Logic OR module	BOS0040 micro:bit BOSON Expansion Board

MBT0039 micro:bit

Tip: micro:bit and its expansion board will be used in programming projects.

Non-programming Project

Connection Diagram:

Connection 3

Programming Project

Connection Diagram:

Connection 2

Program Flowchart:

Flowchart 2

Mind+ Sample Code:

MakeCode Sample Code:

Shy micro:bit

Description: micro:bit is very shy. He only smiles when no one touches the touch sensor. Otherwise, he shows a crying face on his LED array and makes a "crying sound".

Components:


BOS0008 Touch Sensor	BOS0020 Buzzer Module	MBT0039 micro:bit

BOS0040 micro:bit Boson Expansion board

Connection Diagram:

Connection 4

Program Flowchart:

Flowchart 3

Mind+ Sample Code:

MakeCode Sample Code:

Video Demo

Programming

Colorful Lights

Description: When the touch sensor detects a touch, the micro:bit displays a "heart" pattern, and the red, blue and green LEDs blink in order to present a water flow lighting effect. When no touch is detected, all LEDs turn off and the micro:bit display a "square" pattern.

Components: