AVT732 B. Whisper - Whisper Hunter

Ukusebenza kwesistimu kwenza umbono omangalisayo kumsebenzisi. Ukunyenyeza okuthule kakhulu nomsindo ovamise ukungezwakali kuyakhuliswa ukuze uthole umuzwa wokulalela ongasoze wawukhohlwa.

Umjikelezo ulungele ukuhlolwa okuhlukahlukene okuhlobene nokukhulisa imisindo ehlukene. Lokhu kungaba wusizo kubantu abanenkinga yokungezwa kahle, futhi kuwuhlelo olukahle lokuqapha ukulala okuzolile kwezingane ezincane. Izokwaziswa futhi abantu abathanda ukuxhumana nemvelo.

Incazelo yesakhiwo

Isignali evela kumakrofoni ye-electret ye-M1 iya esigabeni sokuqala - i-amplifier engaguquki ene-IS1A. Inzuzo ayiguquki futhi ifinyelela ku-23x (27 dB) - kunqunywa ngabaphikisi u-R5, R6. Isignali ethuthukisiwe ngaphambili inikezwa i-amplifier eguquguqukayo nge-cube IC1B - lapha ukuzuza, noma kunalokho ukuncipha, kunqunywa isilinganiso sokumelana okusebenzayo kwama-potentiometers R11 no-R9 futhi angahluka phakathi kuka-0... 1. Uhlelo inikwa amandla kagesi owodwa, futhi izakhi u-R7, R8, C5 zakha isekethe yomhlabathi yokwenziwa. Ukuhlunga amasekhethi i-C9, i-R2, i-C6 ne-R1, i-C4 iyadingeka ohlelweni lokuzuza okuphezulu kakhulu futhi inhloso yabo ukuvimbela ukuzithokozisa okubangelwa ukungena kwesignali ngamasekhethi amandla.

Ekupheleni kwethrekhi, kusetshenziswe isikhulisi samandla se-TDA2 IC7050 esidumile. Kuhlelo lokusebenza olujwayelekile, lusebenza njenge-amplifier eneziteshi ezimbili enenzuzo engu-20 × (26 dB).

Umfanekiso 1. Umdwebo wohlelo

Ukufakwa nokulungiswa

Umdwebo wesifunda nokubukeka kwe-PCB kukhonjiswe kuMfanekiso 1 no-2. Izingxenye kufanele zidayiselwe i-PCB, okungcono kakhulu ngendlela eboniswe ohlwini lwezingxenye. Lapho uhlanganisa, udinga ukunaka ngokukhethekile indlela yokunamathisela izakhi zesigxobo: ama-electrolytic capacitors, transistor, diode. I-cutout esimweni sokuma kanye nesifunda esihlanganisiwe kufanele sihambisane nomdwebo ebhodini lesifunda eliphrintiwe.

Imakrofoni ye-electret ingaxhunywa ngezintambo ezimfushane (ngisho neziphetho ze-resistors zinqanyuliwe), noma ngocingo olude. Kunoma yikuphi, qaphela i-polarity ephawulwe kumjikelezo kanye nebhodi - kumakrofoni, ukuphela okungalungile kuxhunywe ecaleni lensimbi.

Ngemuva kokuhlanganisa uhlelo, kuyadingeka ukuthi uhlole ngokucophelela ukuthi izakhi zithengiswe ngendlela engafanele noma ezindaweni ezingalungile, kungakhathaliseki ukuthi iphoyinti le-solder livaliwe ngesikhathi sokuthengisa.

Ngemva kokuhlola umhlangano olungile, ungakwazi ukuxhuma ama-headphone kanye nokunikezwa kwamandla. I-amplifier ehlanganiswe ngokungenasici ezingxenyeni ezisebenzayo izosebenza kahle ngokushesha. Okokuqala vula i-potentiometer ibe yincane, i.e. kwesokunxele, bese kancane kancane ukwandisa ivolumu. Ukuzuza okuningi kuzodala ukuzivusa (ama-headphones kanye nemakrofoni endleleni) kanye nokukhala okungathandeki kakhulu, okukhulu.

Uhlelo kumele futhi lunikezwe amandla yiminwe emine ye-AA noma ye-AAA. Ingase futhi inikwe amandla amandla kagesi we-plug-in we-4,5V kuya ku-6V.