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thanks all for the valuable advice..
i have solved the problem..
normally potentiometer is used to supply reference voltage to pin-3... so we can adjust the voltage value of pin-3 by potentiometer. the voltage range of pin-3 has become 0V-5V..
before i thought we need to give high reference...
what is the max voltage has to be given to pin-3 by potentiometer..?
one of my mate says, the range for contrast adjustment is 0V - 0.7V... it means- 0V for high contrast, and 0.7V for minimum contrast. from the potentio meter we need to set that voltage to pin-3. is it correct? i ddint check it...
my LCD is LMB162ABC
i think i have problem with reference voltage supply..
i set that as 1V-2V by using resistor and variable resistor..
and need to know the range of the reference voltage...
my 16x2 lcd is working in a PIC development board with sample program of MikroC.
but same connection, doesnt work in my circuit. i dont kno whats wrong.
normally if power is supplied to LCD, dark square boxes will appear on screen. but in my case, i cant get that from my circuit. so, i took it...
the letter's ascii value can be checked in the MCU-1 and set 1 of the 4pins in MCU. then from the decoder we can check which pin is set, according to that we can on the LCD.
MCU: pic16f877a
problem:
a LCD display is connected with a MCU. i need to On and Off that using the ST-RX04-ASK module Tx and Rx from PERSONAL COMPUTER. - letter "N" for On, letter "K" for Off- has to be pressed from keyboard.
i think there are 2 kind of solution to connecting that RF module...
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