USB Audio DAC: 12 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:25

• Siv tus qauv tsav tsheb, ua haujlwm nrog Windows, Macs thiab ntau Linux kev faib tawm, tab sis txwv kev ua haujlwm rau 16 ntsis, 48 kHz
• Sib npaug (pro) kab theem tso tawm sab nraum qab (XLR / 6.35 mm)
• Ib leeg tas (pro) kab theem tso tawm rau sab xub ntiag (RCA)
• Tsis muaj cov tso tawm series capacitors
• Capacitive SMPS
• USB powered
• Connector rau sab nrauv teeb liab ua board (xws li ntim tswj)

Ameslikas tsim los tiv thaiv lub suab nrov nrov nrov nrov (50 Hz hum) los ntawm kev ua kom nrov nrov los ntawm lub studio saib hom hais lus nquag siv los ntawm kev rov tsim cov khoom siv hluav taws xob. Qee qhov kev lag luam ua ntej amps khaws lub suab nrov zoo ib yam los ntawm lub zog hloov pauv lossis USB lossis spdif cuam tshuam, yog li kuv tsis muaj kev xaiv tab sis tsim kuv tus kheej.

Khoom siv

- Cov ntaub ntawv: Cov ntaub thaiv npog

fi.farnell.com/box-enclosures/b3-080bk/cas…

Kauj Ruam 1: Schematic - Cov Khoom Siv Hluav Taws Xob

Capacitive SMPS tau siv (ua piv txwv ntawm cov khoom siv hluav taws xob) kom tshem tawm 50 Hz suab nrov. Kev lim dej RC ntxiv txo cov suab nrov ntau. Lub suab nrov nrov tsis hnov, tab sis qhov xwm txheej phem tshaj tuaj yeem cuam tshuam rau kev ua haujlwm ntawm lub zog hluav taws xob thiab lwm yam.

Kauj ruam 2: Schematic - USB Interface

PCM2707 muab qhov zoo ntsaws thiab ua si -txhawb rau ntau lub tshuab ua haujlwm thiab yuav tsum tsis muaj ntawv tso cai, thaum cov yam ntxwv tau txwv. Lub teeb liab tau hloov pauv mus rau I2S. Kev ua kom zoo dua qub yuav tsum pib nrog cov khoom siv hluav taws xob no.

Kauj Ruam 3: Schematic - DAC

PCM1794A hloov cov teeb liab digital mus rau analog nrog cov zis tam sim no. Tawm ntawm cov yam ntxwv ntxiv tsuas yog siv lub ntsej muag ntsiag to.

Kauj Ruam 4: Schematic - Analog

Ob lub LME49724 lub tshuab ua hluav taws xob ua qhov sib txawv tam sim no rau kev hloov pauv hluav taws xob, ib qho ntawm ib qho channel. Kev lim dej ntau ntxiv tuaj yeem muab ntxiv.

Kauj Ruam 5: Schematic - Txuas

Lub teeb liab tau xa mus rau tus pin header, qhov twg txhua kab tuaj yeem sib cais ua tiav nrog cov pawg sab nrauv ntawm xaiv. Kuv siv nws rau kev tswj hwm kev txiav txim siab tsis sib xws resistor attenuator board (qee qhov hu nws ua lub zog loj). Tsis tas li ntawd lub suab-teeb liab tau khiav ntawm no. Muting ua haujlwm zoo xwb, tab sis tsis muaj lus tawm tswv yim xa mus rau lub operating system.

Kauj Ruam 6: Schematic - Ib Leeg Teeb Meem

Lub suab teeb liab tseem hloov pauv mus rau qhov kawg, vim qee yam khoom siv yuav tsis txhawb nqa lub teeb liab sib npaug.

Kauj Ruam 7: Kev Tsim Kho Tshuab

Aluminium extrude enclosure tau xaiv nrog aluminium kawg panels uas tuaj yeem milled nrog CNC tshuab. Lwm qhov kev xaiv yuav yog siv PCBs los ua cov ntawv kawg. Fusion 360 tau siv los tsim tus qauv thiab PCB tus qauv.

Kauj Ruam 8: PCB Txheej Txheem

SMPS thiab cov kab hluav taws xob digital yuav tsum raug cais los ntawm cov qib sib piv. Tib yam siv rau kev txhawb nqa cov cuab yeej thiab qib hauv av. Cov kab yuav khaws suab nrov thiab USB cable yuav ua rau muaj suab nrov ntau.

Tiav kov tau ntxiv nrog cov ntxaij vab tshaus artwork:)

Kauj Ruam 9: PCB Los Ua Ke

Rov ua haujlwm lub qhov cub lossis cua sov qhov chaw nres tsheb xav tau rau qee yam ntawm cov khoom siv los txhawm rau txhawm rau txhawm rau txhawm rau hauv qab cov khoom siv. Tawm hauv lub ncoo uas tsis tau muab tshem tawm cuam tshuam rau kev ua haujlwm cua sov lossis tuaj yeem ua rau qhov tsis zoo hauv av txuas rau lub nti.

Txoj cai sib txuas ntawm lub rooj ntug yuav tsum tau ua tib zoo, tshwj xeeb tshaj yog lub rooj tsavxwm tau tsau los ntawm cov ntsia hlau los ntawm ob sab thiab muaj qhov yuam kev ntau dua 2 hli yuav ua rau muaj kev ntxhov siab ntau dhau rau RCA txuas.

Kauj ruam 10: Xaus Panels

Cov vaj huam sib luag kawg tuaj yeem tsim los ntawm CNC milling, txiav laser lossis tsim kom haum PCB. Fusion 360 tau siv rau txoj hauv kev cuab yeej.

Kauj ruam 11: Thiab Muaj Koj Muaj Nws

Txuas nws rau hauv PC thiab nws yuav raug lees paub yam tsis muaj kev teeb tsa lossis teeb tsa.

Kauj Ruam 12: Cov Nyiaj Tau Los: Pawg Thawj Coj

Relays thiab discrete resistors tau siv los tsim tus ntaiv nrog 64 logarithmic cov kauj ruam rau kev tswj ntim. Ib lub rooj tsav xwm zoo sib xws yuav haum rau lwm qhov kev ua haujlwm teeb liab.