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hantto said:Hello!
Is it possible to use the PWM output of a PIC to controll the contrast of an LCD? (into pin 3 of lcd)
hantto said:Your thoughts? (nigel? )
hantto said:100% is 100% PWM and 0% is 0% PWM, so actually it should say 'PWM' instead of 'Contrast'
I did some experimenting. Used a 330ohm and 10µF as a lowpass filter. It showed some distortion on higher PWMs. After increasing the capacitor to 100µF the distortion dissapeared. So a capacitor between 10µ and 100µ would be optimal.
checkmate said:That's a pretty cool enhancement you made. Never thought of using PWM for the contrast before.