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Backlight 16x2 LCD screen View larger

Backlight 16x2 LCD screen

Un produit Pololu

A-000000-00734

4 products

Your mobile robot will be easier to program if it includes this 16x2 characters LCD screen.

11,04€ tax incl.

Including 0,01€ for ecotax

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The backlight 16x2 LCD screen is a liquid crystal screen allowing you to display numerous characters. It uses the very common HD44780 interface. You will find usage example in the Pololu ARV library.

Here is a list of the pins of the backlight 16x2 LCD screen:

PinSymbolFunction
1Vssmasse (0 V)
2Vdd5V logic supply voltage
3VoContrast adjustment
4RSH/L register selection
5R/WH/L read/write signal
6EH/L enable signal
7-14DB0 – DB7H/L data bus for 4 or 8 bits mode
15A (LED+)backlight anode
16K (LED-)backlight cathode

The address of the first character of the top line is 0x00, the one of the last character of the top line is 0x0F. The address of the first character of the bottom line is 0x40, the one of the last character of the bottom line is 0x4F.

adjusting the backlight of the 16x2 lcd screen pololu id=

A potentiometer with output connected to Vo will allow you to adjsut contrast.

The backlight is composed by leds in series. You can therefore adjust the backlight intensity by modifying the voltage between A and K (but stay above the 4.2V needed to activate the leds. Advised current is 120mA) by adding a Rlimit resistor corresponding to the under calculation or with a PWM created by a microcontroller.

Rlimit = (Vbacklight - 4.2V)/(0.12A)