Cov txheej txheem:
- Khoom siv
- Kauj Ruam 1: Op-Amp Raws Li Tus Sib Piv
- Kauj Ruam 2: Txoj Kev Npaj
- Kauj Ruam 3: Tsim Bandpass Lim
- Kauj Ruam 4: PCB Tsim thiab Ua Ke
- Kauj Ruam 5: Muab Tej Yam Ua Ke
- Kauj ruam 6: Txaus siab rau
Video: Suab Spectrum Analyzer (VU Meter): 6 Kauj Ruam
2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:26
Music yog dab tsi? Los ntawm cov txheej txheem kev pom, suab paj nruag yog qhov pib nrog lub zog sib txawv thiab qhov sib txawv. Audio Spectrum Analyzer yog ib lub cuab yeej uas qhia txog qib hluav taws xob ntawm qhov tshwj xeeb. Nws yog ib qho cuab yeej siv feem ntau hauv cov chaw xws li kaw cov suab paj nruag los tshuaj xyuas lub suab.
Txawm hais tias nws yog ib qho cuab yeej, nws yog kev lom zem los saib ntawm lub teeb ua las voos thiab txoj hauv kev zoo kom pom cov nkauj. Ob peb xyoos dhau los, Kuv tau ua qhov hloov pauv me me nrog ob kab lus ntawm pawg thawj coj ua qauv. Ntau ntau ntawm kev sib tsoo thiab ua tiav qhov tsis meej pem! Lub sijhawm no kuv xav kom nws ua kom huv thiab huv si thiab kho qhov muag.
Cia peb pib
Khoom siv
Rau ib kem:
5x LM324 Quad Op-Amp IC
20x Ntsuab LEDs
20 x 100 ohm Resistor
20 x 10k Resistor
1x59k ua
1x 270k Kuj
1 x 2N2222 NPN Transistor
1 x 10 uF Capacitor
Kauj Ruam 1: Op-Amp Raws Li Tus Sib Piv
Kuv yuav tsis piav qhia txog kev ua haujlwm ntawm Op-Amp es peb yuav pom ib qho ntawm nws daim ntawv thov. Muaj ntau cov yeeb yaj kiab zoo hauv YouTube piav qhia txog kev ua haujlwm ntawm Op-Amp.
Op-Amp yog 3 lub davhlau ya nyob twg.
- Tus pin tsis hloov pauv (+)
- Inverting tus pin (-)
- Tso zis
Peb yuav siv op-amp los sib piv ob qhov hluav taws xob. Qhov hluav taws xob Vin ntawm tus pin hloov pauv (-) yog piv nrog qhov hluav taws xob Vref ntawm tus pin tsis hloov pauv (+).
Cia peb tsim ib lub voj voog los qhia nws. LM324 IC uas yog quad op-amp tau siv rau qhov piv txwv no. Qhov ntsuas hluav taws xob Vref ntawm 2.5V tau muab ntawm (+) tus pin siv qhov faib hluav taws xob faib hluav taws xob thiab qhov hluav taws xob Vin ntawm (-) tus pin tau sib txawv siv lub hwj chim ntsuas. Ib qho LED txuas nrog ntawm qhov tso tawm. Thaum Vin 2.5V, cov zis tawm siab thiab LED tig ON.
Cia peb ntsuas qhov Circuit no siv plaub op-amps. Ib qho hluav taws xob faib hluav taws xob tau siv los muab qhov ntsuas hluav taws xob siv (1V, 2V, 3V thiab 4V) rau txhua qhov op-amp. (-) tus pin ntawm txhua qhov op-amps tau txuas ua ke. Raws li qhov hluav taws xob ntawm (-) tus pin dhau los ntau dua 1V, qhov tso tawm ntawm thawj op-amp dhau los ua siab. Txij li 1V tsawg dua qhov ntsuas hluav taws xob ntawm lwm cov op-amps, lawv cov txiaj ntsig tseem nyob qis. Raws li qhov hluav taws xob ntxiv ntxiv, LEDs tig rau ib qho tom qab ib qho.
Siv tib lub hauv paus ntsiab lus tab sis nrog ntau op-amps, peb tuaj yeem tsim Lub Suab Spectrum Analyzer vim tias suab paj nruag tsis muaj dab tsi tab sis lub teeb liab nrog sib txawv voltage.
Kauj Ruam 2: Txoj Kev Npaj
Lub teeb liab ncaj tawm ntawm koj lub xov tooj yog qhov zoo txaus tsuas yog tsav koj lub mloog pob ntseg. Peb yuav tsum tau nce qhov dav siv lub Suab Amplifier. Kuv yuav siv tus hais lus bluetooth vim nws muaj lub tshuab ua suab nrov built-in.
Suab paj nruag yog sib xyaw ntawm ntau zaus. Kuv tsis yog tus kws tshaj lij los ntawm txhua txoj hauv kev. Kev tshawb nrhiav google sai tau muab cov txiaj ntsig hauv qab no:
20 txog 60 Hz Sub-bass
60 txog 250 Hz Bass
500 Hz txog 2 kHz Midrange
4 txog 6 kHz Muaj
6 txog 20 kHz Brilliance
Txhawm rau cais cov zaus no, cov lim lim dej yuav siv. Lub lim lim bandpass yog lub cuab yeej uas hla qhov tshwj xeeb thiab tsis lees paub lwm qhov zaus. Ib kem ntawm cov zaub qhia pom qhov dav lossis qib theem ntawm qhov zaus ntawd.
Kauj Ruam 3: Tsim Bandpass Lim
Siv cov qauv qhia hauv qab no, koj tuaj yeem suav qhov tseem ceeb ntawm R thiab C rau qhov muab zaus.
Faj seeb: Tsis txhob siv electrolytic capacitors
Kauj Ruam 4: PCB Tsim thiab Ua Ke
Siv EasyEDA, kuv xub ua cov txheej txheem thiab tom qab ntawd hloov nws mus rau PCB. EasyEDA yog qhov zoo tshaj rau cov pib zoo li kuv. Muaj tsawg yam uas yuav txhawj xeeb txog thiab yog li peb tuaj yeem tsom mus rau tsim PCB xwb. Koj tuaj yeem xaj ncaj qha koj cov PCBs los ntawm JLCPCB. Txhua kab lus ntawm cov zaub zoo ib yam thiab yog li 10 PCBs uas peb tau txais tuaj yeem siv tau. Kuv tau siv tsib rau tsib qhov sib txawv. Koj tuaj yeem ntsuas qhov Circuit Court raws li koj qib kev vwm!
Tom qab xaj khoom, Kuv tau txais kuv cov PCBs hauv 5 hnub. Tam sim no tau tawm koj cov hlau, sib sau ua ke tag nrho cov khoom thiab pib soldering! Tom qab ntau qhov kev sib tsoo, 5 kab tau ua tiav.
Kauj Ruam 5: Muab Tej Yam Ua Ke
Kuv tsim rooj plaub hauv Fusion 360 rau cov khoom siv hluav taws xob thiab tuav tsib lub lus. Kuv luam tawm nws siv Creality Ender 3. Tsuas yog tus pib ua qauv 3D, tab sis nws ua haujlwm.
Kuv siv tus hais lus bluetooth qub los ua lub suab vim nws muaj lub tshuab ua suab nrov uas twb tau tsim hauv nws. Kuv yuav tsis piav qhia qhov kev sib txuas zoo li koj yuav txawv. Tsuas yog ua raws daim duab kab lus uas tau hais ua ntej hauv Kauj Ruam 2. Kuv txuas lub Audio Input ntawm bandpass lim mus rau qhov tso tawm (hais lus sib txuas) ntawm lub suab nrov.
Muab cov teeb liab tso rau thiab cov xov hluav taws xob los ntawm cov lus qhia rau lub rooj tsav tsheb bandpass.
Cov khoom seem yog nyob ntawm koj. Muaj qhov taw qhia LED ntawm bluetooth tus hais lus lub rooj sib tham Circuit Board uas kuv desoldered thiab txuas nws ntawm sab xub ntiag. Muaj tswv yim!
Kauj ruam 6: Txaus siab rau
Qhov ntawd yog nws! Hwj chim nws thiab txaus siab rau koj cov nkauj nyiam!
Ua tsaug rau koj lo rau qhov kawg. Vam tias koj txhua tus nyiam txoj haujlwm no thiab kawm paub qee yam tshiab hnub no. Qhia rau kuv paub yog tias koj ua ib qho rau koj tus kheej. Sau npe yuav ua rau kuv tus YouTube channel rau ntau qhov haujlwm yav tom ntej. Ua tsaug ntau ntau!
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