togarha
Member level 4
lcd contrast pwm
Hi!!!
What is the frequency (through Low Pass Filter) recomended for the contrast of a LCD?
I want to control the contrast of a LCD with the PWM of a PIC microcontroller, but I don't know what is the best frequency for it.
I want to use a Low Pass Filter (with a resistor and a capacitor) to convert to DC the output of the PWM, but if it is possible I want to use a smd capacitor, then the capacitor may be as long as 470nF (personal stock). It is enough value for the LPF or I must to put a larger electrolitic capacitor? In theory it is possible, but I want to know the practical experience of people...
Thanks in advance...
Regards,
Hi!!!
What is the frequency (through Low Pass Filter) recomended for the contrast of a LCD?
I want to control the contrast of a LCD with the PWM of a PIC microcontroller, but I don't know what is the best frequency for it.
I want to use a Low Pass Filter (with a resistor and a capacitor) to convert to DC the output of the PWM, but if it is possible I want to use a smd capacitor, then the capacitor may be as long as 470nF (personal stock). It is enough value for the LPF or I must to put a larger electrolitic capacitor? In theory it is possible, but I want to know the practical experience of people...
Thanks in advance...
Regards,