Touch Pad Based Home Appliances Control

The main objective of this project is to develop a low cost home automation system with a touch pad based control panel .

Step 1: Touch Pad Connections

Cheap touch pads are available at any mobile accessories shop.

A touch pad consist of 4 terminals. T1, T2, T3, T4 as show in image.

T1 & T3 are connected with +3.3V & gnd of arduino atmega8 board.

T2 & T4 are connected with analog pin A2 & A3 of controller.

Step 2: How Touch Pad Works

Touch pad gives analog value X & Y axis's value.

so we need to convert analog signal into digital signal. Arduino board have built in A to D converter.

We can segment the touch pad by observing the analog value with programming the controller.

Step 3: Arduino Atmega8

here we will use arduino atmega8.

Step 4: Programing

By simple if else condition we can segment the touch pad in 4 parts.

i have attached my program file.

Step 5: Relay Circuit

We are using relay circuit to control high power AC load with controller

I have attached circuit diagram of relay circuit.

Step 6: Connections

Now you can touch on any button and you will be able to turn on or off any appliances.

Step 7: Video



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    3 years ago on Introduction

    Looks cool! Great job on your first Instructable. I hope to see more from you in the future.