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Divizor de tensiune(help)

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M-ar interesa si pe mine, cum se poate face un divizor de tensiune ,pt a reduce tesiunea de 12 volti, de la o baterie auto,la 3 volti.

Va multumesc!!

Daca consumul nu depaseste 1A cu un LM317 se poate obtine orice tensiune in limita 0,1v-12v daca se alimenteaza la 12V mai trebuiesc pe langa el o rezistenta si un semireglabil sau in loc de semireglabil un zenner(sau chiar o rezistenta fixa)

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Nu se merita...sub nicio forma !

Normal ca nu! Pe sarccina vei avea 3V si pe regulatorul serie va "cadea" 9V... deci regulatorul va disipa o putere de trei ori mai mare decit cea utila in sarccina! Cel mai bun randament, in cazul alimentarii de la acumulatorul de 12V, il vei avea realizind un invertor.Atentie! Daca este vorba de un acumulator auto de 12V / 65Ah, acela nu este curentul nominal debitat de ascumulator - reprezinta capacitatea sa exprimata in amperi x ora.
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