How do I find out the best resistor value for the sharpest contrast adjust?

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durgan.karolann
Posts: 2
Joined: Sun May 02, 2021 7:07 pm

How do I find out the best resistor value for the sharpest contrast adjust?

Post by durgan.karolann »

How do I find out the best resistor value for the sharpest contrast adjust?
gdooley
Posts: 1
Joined: Sun Jun 27, 2021 2:36 am

Re: How do I find out the best resistor value for the sharpest contrast adjust?

Post by gdooley »

Connect a 10K potentiometer with one end on the plus voltage (5V or 3.3V) and the other end on the 0V (ground). Connect the wiper pen to the contrast pin (Vo). Adjust the potentiometer until you find the sharpest contrast and then replace the variable resistor with that resistance value.
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