CFAH1602A-RGB-JP backlight questions


New member
what size limiting resistor should i use for the backlight. im a newb to this.....what size resistor for the backlight and for the contrast adjustment.

i have a CFAH1602A-RGB-JP

thanks in advance
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CF Tech

In short:

Rlimit = (+5v - 4.2v)/(130mA maximum) = 6.15 ohms minimum

Add a 5W wirewound 100 ohm in series if you want to dim it.

Use a 10K linear taper pot for the contrast.

Please see this thread for a detailed explanation.