Need some advice:
I am using 3.3V PIC with 5V LCD.
Currently backlight is powered by 5V PS via 100 Ohm resistor (~10mA).
LCD backlight forward voltage ~4V
I need to turn backlight off when PIC goes to sleep mode.
What would be easiest and cheap way to control?
PIC output is 3.3V that I can turn off before PIC goes to "sleep".
I tried few differnt ways with transistors, but like none of them.
Any ideas?
I am using 3.3V PIC with 5V LCD.
Currently backlight is powered by 5V PS via 100 Ohm resistor (~10mA).
LCD backlight forward voltage ~4V
I need to turn backlight off when PIC goes to sleep mode.
What would be easiest and cheap way to control?
PIC output is 3.3V that I can turn off before PIC goes to "sleep".
I tried few differnt ways with transistors, but like none of them.
Any ideas?