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Originally Posted by Al Skierkiewicz
Does the pot have 500 ohms on it or just 500? 500 indicates a 50 ohm pot, 50 times 10^0. 50 ohms on a 5 volt supply is 100 ma or a power dissipation of 1/2 watt. Add to that the current you are supplying to the LCD and for most pots you have exceeded the power rating. Generally, once a pot has been stressed, it longer remains at the value it began with. Take your multimeter and set it to read resistance and place it across the pot to see what the value is now. Let us know shat you find.
Al
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The exact writing is " b500Ω".
And how exactly do I check the resistance?
This is the multimeter I have:
http://www.tenmars.com.tw/ezfiles/te...3_S_YF3503.jpg