Digital slate-an innovative slate for easy and fast learning process


Abstract:

Now a day’s so many useful technologies are coming out to make our life style more comfort, luxurious and secure. With advancements in technologies now we are able to design more user friendly systems with low cost. Previously technologies are used and understandable by literate people only but now technology is reaching children also for making their learning process more fun, understandable and creating curiosity in them to study.
Now a day’s users expecting smart products with more innovation, creativity, user friendly and security, etc. So in this project we are designing a digital slate system for children to learn alphabets and to practice drawing. TFT LCD is used as digital slate.
  
The major components used in the project are capacitive based touch screen module, TFT LCD and ARM7 based LPC2148 32 bit micro controller. TFT LCD (Thin film transistor liquid crystal display) is a variant of liquid crystal display (LCD) which uses thin-film transistor (TFT) technology to improve image qualities such as addressability and contrast. TFT LCD is an active matrix LCD, in contrast to passive matrix LCDs or simple, direct-driven LCDs with a few segments.
The communication between touch screen module and micro controller is done through UART protocol and we will store the images binary data in micro controller memory and send this data to TFT LCD through TFT LCD data lines and control lines.
The NXP (founded by Philips) LPC2148 is an ARM7TDMI-S based high-performance 32-bit RISC Microcontroller with Thumb extensions 512KB on-chip Flash ROM with In-System Programming (ISP), 32KB RAM, Two UARTs, Two I2C serial interfaces, Two SPI serial interfaces Two 32-bit timers,  Real Time Clock with optional battery backup.
This is very attractive and easy learning method we can reduce dust pollution also by avoiding chalk peace and we can easily erase images or letters.

BLOCK DIAGRAM:


Software Tools:
  • KEIL IDE for developing micro controller code
  • ORCAD for designing schematics
  • FLASH MAGIC for dumping the hex file into controller

Hardware Tools:
  • ARM7 based LPC2148 Micro controller.
  • Touch screen  module
  • TFT LCD.
  • Regulated +3.3v and +5v Power supply.

Advantages:
  • No need of chalk peace
  • Fast learning
  • We can erase and create many letters and images

Applications:
  • Digital learning
  • Self learning kit
  • Useful for all languages alphabets
  • Useful for disabled persons