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Arduino Lcd Keypad Shield For Arduino

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Arduino Lcd Keypad Shield For Arduino

I am a Seller

PRs. 600

City: Peshawar

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Posted:08-05-2015 2 Years Ago

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"This DFRobot LCD Keypad Shield male pin connector for Arduino comprises a 16x2 blue LCD display and 6 momentary pushbuttons‚ from left to right‚ SELECT‚ LEFT‚ UP‚ DOWN‚ RIGHT and RESET The shield can be directly plugged onto an Arduino Duemilanove board‚ making soldering or fly-wiring for connection unnecessary Pins 5‚ 6‚ 7‚ 8 and 9 are used as the interface to the LCD The shield operates at 5V

Main features include: A 16x2 blue LCD

Adjustable contrast

Laminated design and easy to expand

Using modified LCD4Bit Interface

Modified LCD4Bit Interface:

In order to preserve the SPI port for future use‚ the Digital IO pins DB7-10 and pin11& pin 12 used in the original LCD4Bit library have been moved to DB4-7 and pin 8 & pin 9 respectively

Keypad:

The keypad consists of 5 pushbuttons — SELECT‚ LEFT‚ UP‚ DOWN and RIGHT plus a RESET button To save the digital IO pin resource‚ the keypad interface only uses one ADC channel The key value is read through a 5 stage resistor voltage divider When a key is pressed‚ the ADC reads the voltage value through the voltage divider; then the voltage value is compared to the voltage value threshold stored in an array to identify which key has been pressed "

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