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Petzy

[microfon] Let's make one!

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Microfoanele folosite la aceste "scule" sunt cu electreti. Ai nevoie de un microfon (se gaseste in casetofoanele cu inregistrare), un preamplificator sensibil si o pereche de casti.

Pentru preamplificator, poti face ceva standard cu cativa tranzistori sau poti "apela" la un circuit integrat specializat. Microfonul respectiv are nevoie de alimentare, el fiind facut dintr-un mosfet.

Parabolica la ala este pentru captarea sunetului dintr-o anumita directie, ajuta mult.

http://www.freeinfosociety.com/electronics/schemview.php?id=377

Tranzistorul poate fi orice NPN din seria BC* (ale noastre romanesti)

Circuitul integrat este BA741 (echivalent)

Edited by aelius
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