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O schema f.simpla de VU-Metre analogice

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Salutare colegi forumisti.Dupa cum spune si titlul as dori daca se poate o schema f.simpla de vu-metre analogice.Inainte de a posta am cautat pe aici dar cea mai simpla schema era cu un tranzistor si componentele aferented.Eu as dori ceva cat mai simplu cu ceva rezistente si cateva diode care cred ca se vor pune la instrument.Rezistenta interna a celor doua vu-metre este de 1247ohm si 1256ohm.

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Nu e nici o problema ! La incercari vei incepe cu semireglabilul dat spre rezistenta maxima si vei regla in asa fel ca atunci cind amplificatorul elibereaza maximul de putere fara distorsiuni (deci NU puterea maxima eliberata) VU-metrele sa indice "0db".

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Tinind cont ca aplici semnal de la iesirea de difuzor nu prea conteaza. Diodele cu germaniu (seria EFD, seria OA) au o cadere de tensiune de aproximativ 0,25V iar cele cu siliciu de aproximativ 0,6V. Eventual pune ceva diode in comutatie (1N4148); daca nu, poti pune linistit chiar 1N-uri.

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