Content:

  1. Abstract
  2. Electronics circuit and embedded systems
  3. Mechanical design.
  4. Microcontroller program
  5. Android app

Abstract

Designing and developing an automation process for testing capacitive touch screen of mobile, there will be android app installed in mobile which displays few color blocks on lcd screen when capacitive touch pen touches the particular color blocks on lcd screen with help of automation process with X,Y and Z-axis movement by holding capacitive touch pen on Z-axis, when capacitive touch pen touches color blocks on lcd screen in this process color block on lcd screen will change if its touch sensitivity is good else the block color will remain same and feedback from android mobile is taken for evaluating performance of touch screen and feedback is displayed on LCD screen.

Specifications

• XYZ axis router setup.
• Atmega 2586 Microcontroller board.
• DC motor driver L298.
• 12V/5A regulated supply.
• Hi-tech 645MG Servo motor z-axis movement.
• 2 DC motors for x-y plane axis movement.
• 2 DC motor encoders 16bit.
• Capacitive pen and its holder.
• 20X4 LCD Display.

Electronics circuit and embedded systems

In this Automatic Touch Screen Testing Machine project we are Arduino nano board which consists of Atmega328 microcontroller with 2KB RAM and 64 KB flash memory this board will act as control unit which gives signals to DRV8266 stepper driver motors and 16 X 2 LCD screen, we have 4 input switches to select menu options all these are interfaced with Arduino nano motherboard.

List of components used in this project.

• Arduino nano 1no.
• DRV8266 stepper motor driver 2nos.
• Nima 13 stepper motos 2nos.
• Servo motor 90G 1no.
• 16 X 2 alphanumeric LCD.
• Input switches.
• Connectors and wires.
• 12V / 2A Adaptor.
• Dotted PCB.
In our Automatic Touch Screen Testing Machine project, we have used dotted PCB for interfacing.

Block diagram of electronics parts

Circuit working operation

We are using 12V / 2A adaptor for powering our circuit board Arduino nano and DRV8825, Arduino nano plays a major role in this Automatic Touch Screen Testing Machine project.