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ELFORUM - Forumul electronistilor
bogdanovich

Potentiometru

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De pe un PLC vreau sa citesc un potentiometru (o rezistenta variabila intre 0-3Kohmi).PLC-ul are porturi analogice ce citesc tensiuni intre 0-10V. Ma intereseaza astfel un circuit alimentat fie in 24V cc fie 12Vcc astfel incat sa citesc o cadere de tensiune intre 0-10V (poate si mai mica de 10V) pe rezistenta variabila a potentiometrului. Tensiunea citita vreau sa fie in functie de rezistenta dar sa fie si functie liniara.O alta intrebare este cum pot face un driver simplu pentru un motor de cc din relee. Ma intereseaza ca motorul sa mearga la turatia lui maxima dar sa-l pot comanda in timp in ambele sensuri ?Va multumesc frumos pentru eventualele raspunsuri.

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