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Control 2 channel relay module using TTP224B- 4 channel keypad module interfacing with arduino nano - KT923

Control 2 channel relay module using TTP224B- 4 channel keypad module interfacing with arduino nano - KT923

SKU:KT923

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KIT CONTENT


Introduction

In this project we are making a home automation project in which we are using 2 channel relay modules using TTP223B touchpad Module interfacing with Arduino Uno. Here we will press the keys on touchpad to control the Relay 1 and Relay 2. If you are looking for applications like control AC lamp or High voltage DC device you need a relay, so let's do something simple to control 2 channel relay modules.

HARDWARE REQUIRED

SOFTWARE REQUIRED

Arduino IDE 1.8.5 (programmable platform for Arduino)

Click To Download:https://www.arduino.cc/en/Main/Software

SPECIFICATIONS

TTP224B 4-CHANNEL CAPACITIVE TOUCH MODULE

  • On-board TTP224 capacitive touch 4 key induction IC
  • On-board 4 road level indicator.
  • Working voltage: 2 V to 5.5 V DC
  • Adjustable output mode, key output mode, longest time and fast/low power output
  • PCB board size: 35(mm) x29 (mm).

ARDUINO NANO

NANO

Microcontroller

ATmega168

Operating Voltage

3.3V or 5V

Input Voltage

3.35 -12 V (3.3V model) or 5 - 12 V (5V model)

Digital I/O Pins

14 (of which 6 provide PWM output)

Analog Input Pins

8

DC Current per I/O Pin

40 mA

Flash Memory

16 KB (of which 2 KB used by bootloader)

SRAM

1 KB

EEPROM

512 bytes

Clock Speed

8 MHz (3.3V model) or 16 MHz (5V model)

2-channel 5V 10A relay Module

This is a 5V, 10A 2-Channel Relay interface board. It can be used to control various appliances, and other equipment’s with large current. It can be controlled directly with 3.3V or 5V logic signals from a microcontroller (Arduino, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic).

It has a 1x4 (2.54mm pitch) pin header for connecting power (5V and 0V), and for controlling the 2 relays. The pins are marked on the PCB:

  • GND - Connect 0V to this pin.
  • IN1 - Controls relay 1, active Low! The relay will turn on when this input goes below about 2.0V
  • IN2 - Controls relay 2, active Low! The relay will turn on when this input goes below about 2.0V
  • VCC - Connect 5V to this pin. Is used to power the optocouplers

PIN DESCRIPTION

TTP224B 4-CHANNEL CAPACITIVE TOUCH MODULE

VCC: 2V to 5.5V DC

GND: ground

OUT4: high/low output

OUT3: high/low output

OUT2: high/low output

OUT1: high/low output

ARDUINO NANO

RAW

For supplying a raw (regulated) voltage to the board

VCC

The regulated 3.3 or 5 volt supply

GND

Ground pins

RX

Used to receive TTL serial data

TX

Used to transmit TTL serial data

2 and 3

Digital I/O pins. These pins can also be configured to trigger an interrupt on a low value, a rising or falling edge, or a change in value

3, 5, 6, 9, 10, and 11

Digital I/O pins. They can also be configured to provide 8-bit PWM output

10, 11, 12 and 13

Digital I/O pins. They can also be configured as SPI pins;

10 - (SS), 11 - (MOSI), 12 - (MISO) and 13 - (SCK)

A0 to A3

Analog input pins

A4 and A5.

Analog input pins. They can also be used as IIC pins;

A4 - (SDA) and A5 – (SCL).

A6 and A7

Analog input pins

Reset

The microcontroller can be reset by bringing this pin low

2 channel 5v 10A relay Module

  • COM- Common pin
  • NC- Normally Closed, in which case NC is connected with COM when INT1 is set low and disconnected when INT1 is high;
  • NO- Normally Open, in which case NO is disconnected with COM1 when INT1 is set low and connected when INT1 is high.
  • Terminal 2 is similar to terminal 1, except that the control port is INT2
  • INT 1- Relay 1 control port
  • INT 2- Relay 2 control port

CIRCUIT CONNECTION

Connections are as follows :

  • Out1 of TTP224 to the Nano D11
  • Out2 of TTP224 to the Nano D10
  • Out3 of TTP224 to the Nano D9
  • Out4 of TTP224 to the Nano D8
  • Ground to the negative rail and Vcc to the positive rail
  • I2C module Vcc to positive rail and ground to the negative rail
  • I2C module SDA pin to Nano A4 and SCL to A5 Nano
  • Nano 5v pin to the positive rail
  • IN1 of relay module goes to D4
  • IN2 of relay module goes to D5
  • Vcc of relay module to positive rail and ground to the negative rail

CODE

Click to see the code or copy the link:

https://drive.google.com/open?id=1zgu_BTbgCzaSqHQe0o0rDVSx10Y3XdPv

WORKING

Upload the code and see the output.

If you are looking for applications like control AC lamp or High voltage DC device you need a relay, so let's do something simple to control Relay 2 channel

Touch Pad 1 and 2 to control Relay #1

Touch Pad 3 and 4 to control Relay #2