Arduino NANO - Level shifter

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il mio goal e' quello di collegare un arduino nano due sensori via spi. entrambi dovrebbero lavorare 3.3 v, quindi ho pensato di utilizzare un logic shifter.

l'unico dubbio che ho sono pull-up resistors. per ora ho messo 3 pull-up (10k) in sck, sdi, , cs e un pull-down (10k) nell'sdo. dopo varie combinazioni l'unica che sembra funzionare e' quando li metto sia nel level shifter 5v che in uno dei sue sensori e 3.3v esattamente con questa configurazione.

tuttavia il  programma non va e mi da numeri decisamente sbagliati. qualcuno saprebbe dirmi quale potrebbe essere il problema e se ho messo resistors nel modo corretto?

sulla spi non servono pullup o pulldown.
ciao uwe


Arduino Forum > International > Italiano > Hardware (Moderator: leo72) > Arduino NANO - Level shifter


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