Yooj Yim 20 LED Vu Meter Siv LM3915: 6 Cov Kauj Ruam

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

Lub tswv yim ntawm kev ua VU meter tau nyob hauv kuv daim ntawv teev npe ntev. Thiab thaum kawg kuv tuaj yeem ua tam sim no.

VU 'meter' yog qhov ntsuas hluav taws xob rau qhov ntsuas ntawm lub teeb liab lub zog. VU lub ntsuas hluav taws xob feem ntau yog siv rau lub tshuab hluav taws xob kom lub zog ntawm lub suab tuaj yeem txiav txim siab los ntawm qee qhov ntsuas ntsuas uas yuav tshwm nyob rau hauv daim ntawv ntawm lub teeb los ntawm LED.

Tus lej ntawm LEDs siv rau qhov ntsuas sib txawv nyob ntawm tus tsim khoom. Rau VU 'meter' uas kuv tau ua, kuv siv 20 LEDs. Txhawm rau kom nws nthuav dua, Kuv faib kuv cov xim coj mus rau 3, uas yog 12 ntsuab, 5 txiv kab ntxwv, 3 liab.

Kauj ruam 1: Saib Video

Daim vis dis aus muab txhua yam ntaub ntawv koj xav tau los tsim txoj haujlwm no. Tab sis hauv cov kauj ruam tom ntej koj tuaj yeem pom cov npe khoom, cov duab thiab cov duab siv rau koj kom yooj yim.

Video:

Kauj ruam 2: Koj Xav Tau Dab Tsi ??

Tau kawg, yam xav tau los ua txoj haujlwm no yog ib qho khoom siv hluav taws xob. Thiab hauv qab no yog cov khoom xav tau nrog rau kev piav qhia me ntsis:

2* IC LM3915

LM3915 yog ib qho kev sib txuas ua ke uas ua rau pom qhov sib txawv ntawm qhov sib npaug thiab ua rau kaum lub LEDs, LCDs lossis lub tshuab nqus tsev nqus cov lus qhia, muab logarithmic 3 dB/qib analog tso saib. Ib tus pin hloov cov zaub los ntawm kab duab kab mus rau qhov pom teev txav. LED tsav tam sim no tau tswj hwm thiab ua haujlwm tau zoo, tshem tawm qhov xav tau rau kev txwv tam sim no. Tag nrho cov kab ke tso tawm tuaj yeem ua haujlwm los ntawm cov khoom siv qis li 3V lossis siab txog 25V.

1*IC LM358

LM358 yog dual op-amp IC ua ke nrog ob lub op-amps siv los ntawm cov khoom siv hluav taws xob ib txwm muaj. Nws tuaj yeem suav tias yog ib nrab ntawm LM324 Quad op-amp uas muaj plaub op-amps nrog cov khoom siv hluav taws xob ntau. Qhov sib txawv ntawm qhov hluav taws xob ntau qhov sib txawv tuaj yeem sib npaug ntawm cov khoom siv hluav taws xob. Lub hauv paus input offset voltage tsawg heev uas yog qhov loj 2mV. Cov khoom siv tam sim no yog 500uA ywj siab ntawm cov khoom siv hluav taws xob ntau thiab qhov siab tshaj tam sim no ntawm 700uA. Kev ua haujlwm kub ntawm 0˚C txog 70˚C ntawm qhov chaw qhov kub siab tshaj plaws tuaj yeem ua tau txog 150˚C. hauv Circuit no, Kuv siv LM358 op-amp txhawm rau nce qib teeb liab.

20*LED

Hauv cov lus yooj yim, LEDs yog cov khoom siv hluav taws xob uas tuaj yeem tso tawm lub teeb. hauv Circuit no kuv siv LED los tso saib lub suab teeb liab lub zog.

1*Mic

muaj ob lub suab los rau VU meter uas kuv tau ua. Thawj qhov los ntawm kev tso suab paj nruag thiab qhov thib ob los ntawm Microphone. los ntawm kev siv lub microphone vu meter tuaj yeem ntsuas lub suab lub suab uas los ntawm ib puag ncig, piv txwv li, tib neeg lub suab thiab lwm yam

1*Trimpot

trimpot suav nrog hom sib txawv resistor. hauv Circuit no kuv siv nws los tswj lub suab ntawm lub microphone mus rau LM3915 IC input

1*PCB

PCB muaj lub luag haujlwm tseem ceeb hauv txoj haujlwm no. PCB tau siv ua qhov chaw rau cov khoom siv thiab cov kab hluav taws xob. Yog li ntawd lub VU meter tuaj yeem ua haujlwm raws li xav tau. Txog cov txheej txheem ntawm kev ua PCB Kuv yuav piav qhia hauv kauj ruam tom ntej

Pasif Kev

Ib qho IC qee zaum xav tau kev txhawb nqa cov khoom tsis xws luag xws li cov tiv thaiv thiab cov khoom siv. Xws li IC LM3915 thiab LM358 uas xav tau cov khoom tiv thaiv passive. Cov hauv qab no yog cov npe ntawm cov khoom siv passive siv: - 2*100n, - 5*2k7, - 2*0R. 2*470uF

Cable

yuav tsum muaj ob peb txoj hlua txuas los txuas lub suab tawm tswv yim thiab VU meter module

Kauj Ruam 3: PCB Schematic thiab Layout

Ntawm no koj tuaj yeem pom PCB cov duab thiab txheej txheem. Schematic thiab teeb tsa tuaj yeem pom hauv daim duab saum toj no. Dhau li ntawm cov duab, Kuv tseem muab lawv hauv PDF daim ntawv uas tuaj yeem rub tawm hauv qab no:

Kauj Ruam 4: Hais kom PCB ntawm PCBWay

Ua kom PCB 2 txheej PCB nrog qhov ua tau zoo. Kuv siv PCBWay cov kev pabcuam los ua 2 txheej PCB rau qhov project VU meter no. Koj tuaj yeem pom qhov ua tiav 2 txheej PCB hauv daim duab saum toj no.

Siv qhov txuas:

• Zoo Siab 10 PCs PCBs rau tsuas yog $ 5 & tus tswv cuab tshiab xaj ua ntej dawb: www.pcbway.com.
• Kev Ua Christmas, koj tuaj yeem tau txais daim npav pub dawb thiab khoom plig ntxiv:

Cov ntaub ntawv gerber los ua VU meter PCB tuaj yeem rub tawm hauv qab no

Kauj Ruam 5: Tso Cov Khoom Siv

Qhov ntsuas VU meter no muaj ntau hom uas tuaj yeem siv tau.

• 20 LED Mono Vu meter.
• Streo VU meter (10 LED / ch).
• Suab paj nruag VU meter.
• Mic VU ntsuas.

Hauv txhua hom, nws yog qhov yuav tsum tau hloov kho cov khoom siv uas tau teeb tsa.

Hauv kab lus no kuv yuav ua VU meter nrog 20 LED Mono VU Meter hom nrog lub suab tso suab nkauj. Rau kev teeb tsa kev teeb tsa saib schematic. Rau cov phiaj xwm uas tau cim nrog tus ntoo khaub lig txhais tau tias lawv tsis tas yuav tsum tau teeb tsa

Kauj Ruam 6: Cov txiaj ntsig thiab Xeem

Cov duab saum toj no yog ib daim qauv ntawm VU meter module uas kuv tau ua.

Txog cov piv txwv ntawm lwm koob koj tuaj yeem mus ntsib kuv tus youtube channel ntawm no:

lossis kuv lwm lub platform ntawm no: