5 posts • Page 1 of 1
Yes, that is the great thing about LEDs is that they are DC (Direct Current) driven and are adjustable without any complex circuitry like what is required for a AC driven backlight such as an EL or CCFL.
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 will introduce some voltage drop, hence the maximum brightness is reduced somewhat.