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led cube 5*5*5

BONJOUR.. je suis un etudiant de la faculté de science de monastir .. j'ai un probléme avec la carte myrio.. s'il vous plait je veut realiser un cube a leds 5*5*5 le problème c'est que le courant de sortie des pins A et B sont trés faible de tels façon  que la luminosité est trés faible ... comment je peut augmenter le courant de la carte ou bien une autre facon pour augmenter la luminosité? ...  

merci d'avance
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Use a digital buffer like this one: 74LVC2G34GW,125


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And remember that LEDs are current driven devices. In other words, their brightness is a function of their drive current. Voltage is a secondary matter, as long as it isn't so low the things can't operate, or so high they fry, voltage really doesn't matter.

Also since you have 125 LEDs that could all be on at once, make sure your power supply is studly enough.

Mike...

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