Impela ufisa ukwazi ukuthi yini a imitha noma isebenza kanjani. Kungabonakala njengokungajwayelekile, kepha ngiyaqiniseka ukuthi ezikhathini ezingaphezu kwesisodwa uke wabona noma wasebenzisa eyodwa cishe ngaphandle kokuqaphela ukuthi ngempela yayingenye yalezi zinsiza. Futhi bakhona ngobuningi bamadivayisi omculo, kufaka phakathi ukuxubana kwama-consoles, okusetshenziswe yisoftware kwamanye amadivayisi womsindo njengama-MP3 players, ama-equalizer, njll.
Kulesi sihloko uzokwazi yazi konke okudingayo funda ngemitha leleveli, ukusetshenziswa kwayo, ukuthi isebenza kanjani, ungayithenga kuphi, nokuthi ungayakha kanjani usebenzisa Izingxenye ze-elekthronikhi elula ...
Yini imitha ye-VU?
El imitha Kuyinto ekwazi ukukala izinga levolumu ngamayunithi akhethekile engizokhuluma ngawo ngokuhamba kwesikhathi. Lawa madivayisi angaba yidijithali kanye ne-analog, lena yokugcina ibe yiyona evame kakhulu namuhla.
Imitha yezinga elijwayelekile ngokuyisisekelo yenziwe ngekhoyili ehambayo noma i-galvanometer enokuthambisa okuthile. Lokhu kuzonikwa amandla yi-wave rectifier ephelele exhunywe kulayini okulalelwayo ngokusebenzisa i-Resistor yochungechunge. Ngaleyo ndlela awudingi noma yimuphi umthombo wamandla owengeziwe, kuphela amandla esignali yomsindo uqobo.
Ngaleyo ndlela, unga khombisa ukwehluka kwamandla wesiginali yomsindo, evumela umsebenzisi ukuthi abone ileveli yevolumu ngaso sonke isikhathi. Bazokwenza ngenaliti ekudayeleni uma kungu-analog, noma ngama-LED uma kungu-digital.
Awudingi ukudida imitha leleveli nge ukulinganisa umsindo (imitha ezingeni lomsindo). Awafani, futhi awokugcina asebenzisa iyunithi ye-decibel noma i-dB ukukala ukweqa kwe-algorithm ezingeni lomsindo abalithwebulayo ...
I-VU: iyunithi
La ivolumu iyunithi VU (IVolumu Unit) ichazwa njenge- «Isibonisi sevolumu sikhombisa i-0 VU lapho okuxhunywayo okunokumelana kwangaphakathi kwama-ohms angama-600 kuxhumene nesiginali sine wave esingu-1000 Hz kanye ne-amplitude engu- + 4 dBu.".
Igama elamukelwe elithi izilinganiso zevolumu okuhlobene nokubona komuntu ukuqina kwesiginali yomsindo.
Aplicaciones
Ukuba ithuluzi lokulinganisa ivolumu, imitha yezinga inayo ubuningi bezicelo kumadivayisi womsindo. Isibonelo, ungayithola kwabanye abahlanganisi, izilinganisi, izidlali zomsindo, imishini yomculo, izinhlelo zomsindo, nokunye okude. Ngakho-ke ngezikhathi ezingaphezu kwesisodwa uke waba neyodwa phambi kwakho futhi ubungazi nokuthi ibizwa nge-vumeter.
Ungase yisebenzise ukuthola ngendlela ebonakalayo ngaphezulu ileveli yomsindo wesilinganisi esizenzele wena, ukuyixhuma kokukhiphayo komsindo kwedivayisi oyifakile, njll. Abanye baze bakhe izingoma eziyinkimbinkimbi ze-LED njengezinto ezilula zokuhlobisa, ukuze zikhanyise "kusigqi" somculo. Amathuba abanzi impela, unquma ...
Ukuthenga kuphi
Uma ufuna ukuthenga imitha ezingeni, lapho-ke kufanele wazi ukuthi akutholakali kalula kwezinye izitolo, kepha ungathola eyodwa yazo ezitolo ezithile ezikhethekile noma ezisekelweni zokuthengisa eziku-inthanethi. Isibonelo, nayi eminye imibono yokuthenga:
- I-Nobsound, isikrini esiyinkimbinkimbi ukukhombisa amazinga womsindo lapho uyixhuma kokukhipha umsindo. Isikrini sinokulungiswa kwezinto ezikhanyayo ze-15x15.
- I-Kongnijiwa, imitha yezinga eliphezulu lokunemba kwe-analog.
- 2 amamitha ne-PCB ukuxhuma kokukhipha i-amplifier kumaphrojekthi wakho.
- Imitha yezinga le-Stereo enama-LED angama-2x15.
- IVelleman MiniKits elula imitha yezinga le-LED
- Enye indlela efana neyangaphambilini enama-LED aluhlaza, nephuzi nokubomvu ukumaka imiqulu ephezulu.
- I-Tiamu, imitha yezinga elilula ene-LM3915 chip nama-LED.
Yakha imitha yezinga lokuzenzela
Unayo izindlela ezahlukahlukene zokwakha imitha elilinganiselwe ngendlela elula kakhulu. Enye yazo nge-IC LM3914, i-LM3915, noma i-LM3916. Ama-chips amabili athandwa kakhulu emhlabeni we-electronics. Ngokungeziwe kuleyo chip, njengoba ubona esithombeni esedlule, uzodinga futhi ama-LED emibala oyikhethayo ukukhombisa izinga levolumu ngokubonakalayo, nezinye izinto ezingeziwe ezinjenge-resistors, potentiometer, ne-capacitor.
Ukuqonda kangcono umhlangano wayo, ungasebenzisa eyodwa yalezi amavidiyo wokufundisa lapho bechaza khona igxathu negxathu:
Unezinye izinketho, njengalezi ezinye ezilula ezisebenzisayo iziteshi ezimbili ze-LED kwesitiriyo:
Kulokhu okunye akuqashile ama-IC amathathu engikucaphune ngenhla ukubheka umphumela kulowo nalowo kubo: