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ELFORUM - Forumul electronistilor

Vu-meter cu led


Guest crisangel33

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Guest crisangel33

Salut am un Vu-meter facut de mine cel cu ac , 4 diode 1 rezistenta de 3k si un condensator merge ok , l-am legat la iesirea din placa de sunet adica este asezat pe unitate , dar mar interesa sai pun un led , avand in vedere ca este dioda Nu inteleg dece nu se aprinde si as avea o intrebare cum as putea sal fac sa functioneze , Ma refer la bass etc...

http://www.google.ro/imgres?start=98&um ... ,s:98,i:20

 

 

Multumesc anticipat !

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Guest crisangel33

deci am vu-meter cu ac si vreu sa ii fac 1 led sau 2 sa faca dupa inalte sau medii adica dupa sunet si am incercat cu un led pe acea schema da nu merge ...

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Guest crisangel33

am vro solutie sai maresc tensiunea...? sau las sa alimentez cu o sursa si sa nu mai faca dupa melodie..desi pe mine mar fi incantat solutia sai pot mari voltajul

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tensiune poate ai. dar ai vazut ce scrie pe "ac"50-100uA nu o sa apinzi ledul in veci :da calculeaza si tu ce curent ai la 1V prin 3K. si la un led ii trebuie o medie de 20mAincearca cu o dioda si o rezistenta la vreo 10 ohm inainte de rezistenta, direct pe iesirea de la sunet.

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