4 Microphones Tov Khoom Preamplifier: 6 Cov Kauj Ruam (nrog Duab)

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:24

Qee lub sij hawm dhau los kuv tau thov kom daws cov teeb meem hauv qab no: hu nkauj me me ua tus lej ntawm plaub lub microphone ruaj khov. Lub suab cim los ntawm plaub lub microphones yuav tsum tau ua kom nrov dua, sib xyaw thiab cov txiaj ntsig tau tshwm sim yuav tsum tau siv rau lub tshuab hluav taws xob ua suab nrov vim tias kuv tsis pom lub cuab yeej los ua qhov no, Kuv tau tsim ib qho. Qhov ntawd yog txhua yam hais txog.

Khoom siv

Tus kheej, Kuv muaj tag nrho cov khoom siv thiab cov khoom siv hauv kuv tus kheej lub rooj cob qhia, los ntawm kev rov zoo.

Cov khoom siv hluav taws xob tuaj yeem pom ntawm AliExpress ntawm tus nqi qis. Muaj khoom siv (hlau thiab yas) raug pom zoo kom rov zoo li qub los ntawm LED qub lossis LCD TVs.

Kuj tseem muaj qee cov ntaub ntawv xws li: ntsia hlau, txiv ntseej, spacers, ntawv nplaum rau tus kheej uas tuaj yeem yuav los ntawm DIY khw muag khoom.

Kauj Ruam 1: Daim duab qhia chaw

Cov qib qis (1-10mV) los ntawm 4 lub microphones tau thov rau cov tswv yim In1…

Ua raws 4 lub teeb liab qis thiab lub suab nrov nrov qis, ib ntawm txhua lub channel, ua nrog Q101 … Q402.

Txhua lub transistors muaj suab nrov qis (piv txwv li BC413) thiab tiv nrog cov yeeb yaj kiab hlau.

Muaj qhov kev tawm tswv yim zoo (C106, C107, R107 ntawm thawj channel) uas ua rau kom muaj suab nrov ntau ntxiv.

Kuj tseem muaj cov tshuaj tiv thaiv tsis zoo hauv cc. nrog R106, R101 uas ua kom sov cov theem ruaj khov.

Tom ntej no, kev hloov pauv ntim tau ua rau txhua lub channel nrog P100 … P400.

Tom ntej ntawm txhua cov channel yog lub tshuab ua kom nrov nrog 10, ua nrog U1-TL074 ua haujlwm ua haujlwm nrog Tz JFET ntawm qhov nkag thiab suab nrov.

Kev sib xyaw ntawm cov cim qhia tau ua tiav ntawm R412, uas cuam tshuam qhov ua kom me me ntawm cov cim ntawm 4 ceg ntoo.

Ntawm qhov tso tawm koj tuaj yeem tau txais 1 Vef yooj yim. txaus kom txaus siab zaum kawg lub hwj chim amplifier.

Lub zog fais fab pib los ntawm Tr. transformer uas muaj ob qhov sib cais thib ob.

Thawj muab 16V / 50mA thiab thib ob 24V / 100mA.

Qhov hluav taws xob ntawm 16Vca. yog kho nrog D502, lim nrog C504 thiab ruaj khov nrog D505. Qhov voltage ntawm -9V yog li tau txais.

24Vac qhov hluav taws xob tau kho nrog D501, lim nrog C501. Qhov ntsuas hluav taws xob tsis ruaj khov ntawm + 33V tau txais.

Qhov hluav taws xob no tau qis dua thiab ruaj khov ntawm + 20V los ntawm U501 LM317.

D504 muab qhov hluav taws xob ntawm + 9V.

Voltages ntawm +/- 9V yuav tsum tau muab U1.

Lub xub ntiag ntawm qhov khoom siv hluav taws xob tau qhia los ntawm LED teeb pom kev zoo.

Kauj Ruam 2: Sau Cov Khoom, Cov Khoom, Cov Cuab Yeej

Txhua tus tiv thaiv yog 0.125W lossis 0.5W, zaj duab xis hlau.

• 120-1pc.
• 470-2 hli
• 680-4pcs.
• 1K-9pcs.
• 2 k2-1pc.
• 10K-5pcs.
• 39K-4 daim.
• 47K-4 daim.
• 220k-8pcs.
• 390K-4pcs.
• 470K-4pcs.
• Potentiometer 10K-4pcs.
• Pob qhov rooj rau lub zog loj -4 pcs.

Radial electrolytic capacitors

• 2.2uF/16V-4pcs.
• 4.7uF/25V-8pcs.
• 10uF/16V-2pcs.
• 47uF/16V10pcs.
• 100uF/16V-4pcs.
• 1000uF/25V-1pc.
• 1000uF/35V-1pc.

Cov Capacitors 330pF/35V-4pcs.

Semiconductors:

• Hom transistors: BC413, BC173C, BC109C, 2N930- NPN qis suab nrov -8pcs.
• IC: TL074-1pc.

IC: LM317-1pc

• Rectifier choj: 1PM1 (100v/1A) -2pcs.
• Zener diodes: PL9V1-2pcs.
• LED 5 hli xiav-1 pc.

Lwm tus:

PCB rau cov khoom siv hluav taws xob (qhov project ExpressPCB) -1 pcs

• PCB rau tov khoom preamplifier module (ExpressPCB project) -1 pcs.
• Tr: tug. nrog 2 theem nrab: 16V/50mA thiab 22..24V/100mA.-1pc.
• Network txuas cable.
• Jack poj niam 6mm-5pcs.

Tus pin headers 25pcs

Hlau

Cov kab laug sab

Cov cuab yeej rau cov laug

• Pliers rau txiav cov khoom sib txuas
• Thaum tshav kub kub shrinkable kua roj vanish 2.5mm txoj kab uas hla -50cm.
• Digital multimeter (txhua yam).
• Aluminium phaj 165X235 hli thiab tuab 1.5 hli. rau hauv qab ntawm lub cuab yeej (daim duab 1)
• Txhuas phaj 190X20 hli thiab tuab 1.5 hli. rau kev txhawb nqa ntawm potentiometers.

• Ib nrab pob tshab yas phaj 165X235 hli thiab tuab 3 hli. rau sab saum toj vaj huam sib luag ntawm lub cuab yeej

  (duab 1)

• Screws, txiv ntseej, spacers (duab 1).
• Ntsia Hlau.
• Cov cuab yeej ntsuas ntsuas qhov ntev.
• Cov cuab yeej rau hlau thiab yas drilling, ua ntawv, hlau thiab yas txiav rau kev ua haujlwm ntawm lub cuab yeej (koj yuav tsum yog phooj ywg nrog lawv ua txoj haujlwm).
• Cov ntawv nplaum rau tus kheej rau cov ntawv lo thiab cov khoom zoo nkauj.
• Mob siab rau ua haujlwm.

Kauj Ruam 3: Ua thiab Sib Sau PCBs

Rau tov khoom, PCB yog ua los ntawm 1.5 hli tuab FR4, ob tog. Tsis muaj xim hlau qhov. Qhov kev hla hla yog ua los ntawm cov hlau tsis huv.

Rau lub zog xa khoom, PCB tau ua los ntawm 1.5 hli tuab FR4, ib sab.

Tom qab echting thiab drilling, npog nrog tin, manually. Peb tshuaj xyuas nrog digital multimeter qhov txuas ntawm txoj hauv kev thiab qhov ua tau luv luv ntawm lawv. PCB tau tsim los hauv ExpressPCB, ib txoj haujlwm uas tuaj yeem siv tau dawb. Nws tuaj yeem rub tawm dawb los ntawm Is Taws Nem.

Cov duab 2, 3, 4, 5 qhia txog PCBs sib dhos.

Ntawm qhov chaw nyob:

github.com/StoicaT/4-Microphones-Mixer-Pre…

muaj qhov tsim ntawm PCBs cov cuab yeej thiab lwm yam ntsiab lus ntawm qhov project. Koj tuaj yeem rub tawm PCB tsim uas muaj txhua lub ntsiab lus tsim nyog rau kev ua tiav, tau kawg yog tias koj muaj ExpressPCB teeb tsa ntawm PC / laptop.

Kauj Ruam 4: Rooj Sab Laj

Pib los ntawm cov khoom siv hauv daim duab 1, cov khoom siv sib dhos yuav ua tiav raws li cov duab 6, 7, 8, 9, 10, 11.

Aluminium phaj yuav muaj qhov ntev ntawm 165X235 mm thiab tuab ntawm 1.5 mm.

Cov yas yas ib nrab pob tshab muaj qhov ntev tib yam thiab tuab ntawm 3 hli.

Thaum koj ua haujlwm rau lub rooj tsavxwm no, nws yuav tsum nco ntsoov tias cov yas yaj ntawm cov cuab yeej qis.

Nws raug nquahu kom siv cov cuab yeej siv tes, tsis yog hluav taws xob.

Kauj Ruam 5: Kev thaiv thiab tso ua haujlwm

Kev txuas hluav taws xob tau ua tiav raws li daim duab qhia chaw thiab daim duab 12.

Thaum tshav kub kub-shrinkable varnishes yuav siv tom qab soldering cov xov hlau rau tus pin.

Kev ua haujlwm yog ua tiav los ntawm kev ntsuas cov ntsuas hluav taws xob raws li daim duab qhia duab nrog cov digital multimeter. Txheeb xyuas tias lawv raug.

Kauj Ruam 6: Kev Sib Duav Kawg thiab Siv

Yog tias txhua yam zoo, teeb lub phaj yas, siv lub ntsaws ntsaws ntsaws ntsaws, tom qab ntawd lub pob qhov rooj muaj zog, saib daim duab 13.

Cov ntawv nplaum rau tus kheej yuav raug siv thiab rau qhov laj thawj zoo nkauj, tus kheej-nplaum foils ornaments tuaj yeem muab ntxiv, saib cov duab 14, 15. Ntawm no, tus kws kos duab hauv peb tuaj yeem nthuav tawm nws tus kheej dawb.

Cov ntawv sau tau tsim nrog Inkskape program thiab tuaj yeem pom ua ke nrog PCBs.

Yog lawm, Inkscape program yuav tsum tau teeb tsa ntawm koj lub PC / laptop. Nws yog qhov program uas tuaj yeem rub tawm thiab siv tau dawb.

Lub microphones tau tso rau hauv MIC1.. MIC4 jack. Qhov kev hloov kho ntim tau ua tiav cais rau txhua lub microphone, ntawm qib uas xav tau.

Cov zis ntawm cov khoom sib txuas tau txuas nrog cov tswv yim ntawm lub zog siv hluav taws xob nrog 6mm jack-jack cable.

Txuas lub cuab yeej rau AC network.

Thiab qhov ntawd yog nws!