Spectrum Analyzer: 4 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:27

Txoj haujlwm no yog rau 'Kev Tsim Khoom Siv Hluav Taws Xob', Beng Electronics Engineering xyoo 4 tus qauv ntawm University of Málaga, Tsev Kawm Ntawv Kev Sib Txuas Lus (https://www.uma.es/etsi-de-telecomunicacion/).

Txoj haujlwm no tau tsim thiab teeb tsa los ntawm Carlos Almagro, Diego Jiménez thiab Alejandro Santana, peb tau ua "lub thawv ntaus nkauj" tswj los ntawm Arduino Mega (peb tau xaiv nws vim tias Arduino Leonardo tsis muaj zog txaus rau neopixel matrix), uas qhia los ntawm 8x32 neopixel matrix lub suab paj nruag. Lub tswv yim tseem ceeb yog ua piv txwv lub suab teeb liab hauv 8 kab (ib qho bar txhawm rau sawv cev rau txhua lub sijhawm sib xws, txog 20kHz).

Lub teeb liab nkag los ntawm qhov chaw nres nkoj jack 3.5 thiab mus rau arduino thiab cov hais lus, cov kauj ruam dhau los ntawm kev ua kom nrov nrov.

Kauj Ruam 1: Cov Khoom Siv thiab Cov Khoom

Arduino Mega (homElegoo)

Placa de soldadura a doble cara

4 resistencias ntawm 220

4 leds ib

2 tus neeg hais lus qub

2 kev tawm tsam ntawm 330

2 ntxig khawm khawm

1 tsis kam ntawm 470

1 condenser ntawm 10uF

1 condenser ntawm 220uF

1 tsis kam ntawm 1K

1 tsis kam ntawm 100k

2 ua 741

Insertion Pines txiv neej thiab poj niam

2 amplifiers PAM8403

Kauj ruam 2: Kho vajtse

Raws li peb paub, qhov ntau qhov hluav taws xob uas tuaj yeem nkag mus rau Arduino yog nyob ntawm thaj tsam 0 [V] txog 5 [V], tab sis qhov ntau qhov hluav taws xob ntawm lub suab tso tawm los ntawm lub mloog pob ntseg lub dav hlau ntawm tus kheej lub computer thiab lwm yam yog -0.447 [V] txog 0.447 [V].

Qhov ntawd txhais tau tias qhov hluav taws xob viav vias txawm tias mus rau sab rho tawm thiab qhov dav me me dhau los ncaj qha rau Arduino Suab teeb liab tsis tuaj yeem nkag tau. Yog li ntawd, hauv Circuit Court no, ua ntej, qhov hluav taws xob raug rub los ntawm 2.5 [V], uas yog ib nrab qhov hluav taws xob ntawm 5 [V], tom qab ntawd nkag mus rau tus lej sib piv ntawm Arduino tom qab dhau los ntawm lub tshuab hluav taws xob kom nce qhov dav nws yog teeb tsa. Tom qab ntawd peb yuav tshuaj xyuas daim duab qhia chaw:

1. Qhov nruab nrab ntawm qhov muaj peev xwm tshaj tawm / tsis hloov pauv lub tshuab hluav taws xob X1 thiab X2 yog lub tso suab me me. Txij li nws tau yooj yim txuas nrog ua ke, nws tuaj yeem yog nkag los lossis tso tawm. Peb tuaj yeem pom, tsuas yog ib qho ntawm lub suab tso suab tso tawm. R17 yog txhawm rau kho qhov rhiab heev ntawm cov tshuab ntsuas hluav taws xob. Los ntawm C1, ib sab ntawm R17 txuas nrog lub peev xwm nruab nrab. Los ntawm kev ua li ntawd, nws muaj peev xwm ua kom muaj qhov ntsuas hluav taws xob sib xws rau qhov nruab nrab ntawm qhov muaj peev xwm mus rau lub suab tawm suab. Tom qab ntawd tsis muaj qhov hloov pauv tau ntawm lub tshuab hluav taws xob. Ib qho ntxiv, nws yog qhov yuav tsum tau siv op amp nrog kev tsheb nqaj hlau-rau-kev tsheb nqaj hlau (tag nrho cov viav vias tawm).

2. Qhov nruab nrab nruab nrab qhov muaj peev xwm tsim hluav taws xob (tsheb ciav hlau sib cais) R9, R10, R11 faib lub zog hluav taws xob qhov hluav taws xob ib nrab thiab nkag mus rau nws raws qhov ntsuas hluav taws xob. R11 yog rau kev kho kom raug ntawm qhov nruab nrab qhov peev xwm. Kuv xav tias nws yog qhov zoo los siv ntau-tig ib nrab-tsau resistor ntawm no.

3. Cov khoom siv hluav taws xob sib piv LPF Circuit R6 thiab C3 tsim cov lim qis uas muaj qhov txiav tawm qis heev thiab siv nws los ua lub zog siv rau kev ua haujlwm siab. Los ntawm kev ua qhov no, suab nrov sib xyaw los ntawm lub zog tseem ceeb raug txiav. Txij li qhov hluav taws xob ntawm VCC poob qis dua + 5V vim tias R6 tau ua nyob rau hauv cov khoom siv hluav taws xob, qhov hluav taws xob no tau nkag mus rau qhov sib piv siv hluav taws xob tus pin ntawm Arduino. Qhov kev zov me nyuam teeb tsa qhov siv hluav taws xob qhov hluav taws xob sab nraud.

4. SPI qhov kev faib hluav taws xob faib hluav taws xob rau cov tswj vaj huam sib luag LED Txuas cov tswj vaj huam sib luag LED ntawm no, tab sis txij li qhov hluav taws xob uas tuaj yeem nkag mus rau cov tswj vaj huam sib luag LED yog 3.3 V, qhov hluav taws xob faib tawm qhov hluav taws xob tau tso.

Thaum kawg peb tsuas yog yuav tsum tau txuas lub neopixel vaj huam sib luag rau digital pins I/O ntawm arduino.

Peb tau coj qhov kev tsim kho vajtse no los ntawm no

peb tsis tau pom dua hais txog daim ntawv tso cai hauv nplooj ntawv no, tab sis peb xav tias yuav tsum tau hais txog thiab ua tsaug rau nws.

Peb tau ua ob lub khawm tswj kom hloov pauv qhov sib txawv thiab peb tswj hwm lub suab nrog qhov ua tsis tau.

Kauj ruam 3: Software

Peb tau tsim txoj haujlwm uas siv qhov kev hloov pauv plaub mus rau qhov sib piv ntawm cov teeb liab nkag mus rau hauv FFT lub tsev qiv ntawv (uas koj tuaj yeem rub tawm hauv tus kheej tus lej arduino IDE), thiab nws ua piv txwv lub teeb liab rau qhia 8 zaus sib nrug. Nws tuaj yeem xaiv ntawm 4 hom sib txawv ntawm teeb pom kev zoo.

Kauj ruam 4: Rooj plaub

Cov ntaub ntawv tsim yog tsis pub dawb thiab sib txawv hauv txhua qhov haujlwm, tsuas yog qhov xav tau yog tias txhua yam khoom siv thiab cov khoom sib txuas haum rau sab hauv thiab tuaj yeem qhia cov neopixel matrix.