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Topic: OUTPUT not ouputting 5v (Read 542 times) previous topic - next topic

James C4S

Are you trying to power the LCD with the pin?
Capacitor Expert By Day, Enginerd by night.  ||  Personal Blog: www.baldengineer.com  || Electronics Tutorials for Beginners:  www.addohms.com

mginster

Nope, it is an unused pin from the LCD shield.  Its just a pass through hole on the shield.

MarkT

An unloaded pin that's set HIGH should be millivolts away from the 5V supply - its being pulled high by a FET
with an on resistance of around 50 to 100 ohms.   If its reading 2.8V it suggests its either not set as an OUTPUT
(ruled out by the code snippet) or there is too heavy a load on it or the pin is burnt out.
[ I won't respond to messages, use the forum please ]

fungus


Nope, it is an unused pin from the LCD shield.  Its just a pass through hole on the shield.


Either something is connected to it that you don't know about or it's damaged (from a previous overload).

Try removing the shield and test it again.
No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

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