Search found 2 matches
- Thu Mar 22, 2018 5:20 pm
- Forum: UWVD (Ultra Wide Viewing Display)
- Topic: Can the LED backlight on a LCD be dimmable?
- Replies: 4
- Views: 55960
Re: Can the LED backlight on a LCD be dimmable?
Yes. A resistor inline with BL+ or BL- will give a fixed intensity; a trim pot will provide manual control; a computer with a PWM port to a transistor switch will provide program control (use a large capacitor and a resistor as a low-pass filter to avoid rapid switching of the LED.) The transistor w...
- Thu Mar 22, 2018 4:45 pm
- Forum: Character LCD
- Topic: Which pin on a character LCD is for contrast?
- Replies: 2
- Views: 3566
Re: Which pin on a character LCD is for contrast?
Typically, pin 3 for 20x4 or smaller, or pin 12 for 40x4 displays, but, as always, READ THE MANUAL for your device!