mikee Posted October 11, 2009 Report Posted October 11, 2009 Hi allref attatched diagrams:The first (original) is original circuit (schematic) of the LCD backlight brightness control.Second (modified) looks better to me, and works very well too ;)regards alllcd bright.JPGlcd bright.JPG Quote
nILS Posted October 11, 2009 Report Posted October 11, 2009 Difference is your circuit does not only limit current (which is the point of th BL circuit) but also drops the voltage if the trimpot is set to <5k between ground and the wiper. Quote
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