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ionut90

Doua tensiuni, o singura iesire?

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Am doua tensiuni care variaza in limita 0...5V de la niste traductoare de temperatura. Tensiunile astea ma gandeam sa le bag intr-un circuit astfel incat sa rezulte:

- ori media celor doua tensiuni de intrare;

- ori cea mai mare dintre cele doua tensiuni.

Care credeti ca este cel mai potrivit circuit ca sa faca asta.

 

mersi anticipat :ball:

Edited by ionut90

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O solutie eleganta ar fi sa apelati la un microcontroler care are canale ADC incluse si un circuit CAN. Variatia tensiunii la iesirea CAN-ului va fi mult mai aproape de tinta propusa, indiferent daca doriti la iesire media, presupun aritimetica a celor doua marimi, sau cea mai mare valoare dintre ele.

 

Numai bine

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pentru medie - faci un sumator cu AO si divizezi tensiune de iesire cu doi (cu un divizor rezistiv)

 

pentru max - un circuit comparator care comanda un mux. (comparator cu AO in bucla deschisa)

 

RR

post-1482-0-21083500-1371152725_thumb.png

Edited by roadrunner

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