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Problema con el teclado 4x4
Posted: Thu Dec 10, 2009 9:48 am
by pibepru
Hola, tengo un problema con el teclado 4x4 y no logro saber lo que pasa. He puesto las resisencias como en el EB014 y y sin apretar ninguna tecla me carga distintos valores en la variable ΒΏme podrias dar alguna pista? gracias.
Re: Problema con el teclado 4x4
Posted: Tue Jan 05, 2010 5:18 pm
by Benj
Hello
Roughly translated...
Hello, I have a problem with the keyboard 4x4 and profit not to know what happens. I have put the resisencias like in the EB014 and without tightening no key it loads different values to me in the variable podrias to give some track me? thanks.
It sounds like the input pins are still floating.
What resistance values did you use?
Do you have a schematic of your keypad circuit you could share with the forum?
Do you have a multimeter you can use to ensure that the input pins are being pulled high by the resistors?