i have a 4x20 character LCD with 16 pinouts. well, i already have the pinouts for pins 1 - 14. its pretty obvious that pins15 and 16 are for the backlight. i don't know which is for the VCC and GND, and how i should connect them. but i alreay have the switching circuit for backlight to turn it on and off. its just composed of a trasistor.
VCC (5V)
|_____
_____ > TO LCD
|
< Resistor (470 ohm)
>
|
/
to MCU --v^v^---| the transistor used is 2N2222A (NPN)
R \
|
|
GND
is that circuit alright?
TIA.
-jay
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LCD backlight
2004-04-11 by jay marante
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