Ngokuqinisekileyo unomdla wokwazi ukuba yintoni a imitha yeemitha okanye isebenza njani. Ingabonakala ingaqhelekanga, kodwa ndiqinisekile ukuba ngaphezulu kwesihlandlo esinye ubonile okanye wasebenzisa enye phantse ngaphandle kokuqonda ukuba yayiyenye yezi zixhobo. Kwaye zikhona ngobuninzi bezixhobo zomculo, kubandakanya nokuxuba ii-consoles, eziphunyezwe yisoftware kwizixhobo ezithile ezinesandi njengabadlali beMP3, iialinders, njl
Kweli nqaku uza yazi yonke into oyifunayo funda ngemitha yenqanaba, usetyenziso lwayo, ukuba isebenza njani, ungayithenga phi, kunye nendlela yokwakha enye usebenzisa Izinto zombane elula ...
Yintoni imitha yeVU?
El imitha yeemitha Sisixhobo esikwaziyo ukulinganisa inqanaba levolumu kwiiyunithi ezizodwa endiza kuthetha ngazo kamva. Ezi zixhobo zinokuba zidijithali kunye ne-analog, eyokugqibela iyeyona ixhaphakileyo namhlanje.
Imitha yenqanaba eliqhelekileyo yenziwe ngokusesikweni ngekhoyili eshukumayo okanye i-galvanometer enesithambisi esithile. Oku kuya kunikwa amandla ngumlungisi opheleleyo woqhakamshelwano odityaniswe kumgca audio ngokusebenzisa uthintelo kuthotho. Ngale ndlela, awudingi nawuphi na umthombo wamandla ongezelelweyo, kuphela ngamandla wesandi sesandi uqobo.
Ngale ndlela, unako bonisa ukwahluka kwamandla ombane wesandi esimanyelwayo, Ukuvumela umsebenzisi ukuba abone inqanaba levolumu ngalo lonke ixesha. Baza kuyenza ngenaliti kucofa ukuba zi-analog, okanye ngee-LEDs ukuba zidijithali.
Awunyanzelekanga ukuba udideke imitha yenqanaba nge imilinganiselo yengxolo (Imitha yenqanaba lesandi). Azifani, kwaye ezokugqibela zisebenzisa iyunithi ye-decibel okanye i-dB ukulinganisa ukutsiba kwe-algorithmic kwinqanaba lesandi abasibambayo ...
VU: iyunithi
La iyunithi yevolumu VU (Icandelo leVolumu) ichazwa njenge «Isibonisi sevolumu sibonisa i-0 VU xa imveliso inonxibelelwano lwangaphakathi lwama-ohms angama-600 iqhagamshelwe, kumqondiso wesine wave we-1000 Hz kunye ne-amplitude ye -4 dBu.«.
Ixesha elamkelweyo imilinganiselo yevolumu inxulumene nembono yomntu ngamandla esandi somqondiso.
Izicelo
Ukuba sisixhobo sokulinganisa ivolumu, imitha yenqanaba inayo ubuninzi bezicelo kwizixhobo ezinesandi. Umzekelo, ungayifumana kwabanye abaxube, abalinganisi, abadlali beaudiyo, izixhobo zomculo, iinkqubo zomsindo, kunye nexesha elide njl. Ngokuqinisekileyo ngaphezulu kwesihlandlo esinye ubenayo phambi kwakho kwaye ubungazi nokuba ibizwa ngokuba yivumeter.
Unga yisebenzise ukufumana ngendlela ebonakalayo ngakumbi inqanaba lesandi lesilinganisi esenziwe ekhaya, ukuze usidibanise nesiphumo sesandi sesixhobo osifakileyo, njl. Abanye bade benze uyilo oluntsonkothileyo lwe-LED njengezinto ezilula zokuhombisa, ukuze zikhanyise ziye 'kumculo' womculo. Amathuba abanzi kakhulu, uthatha isigqibo ...
Ukuthenga phi
Ukuba ufuna thenga imitha yomgangatho, ke kuya kufuneka uyazi ukuba akukho lula kakhulu ukuzifumana kwezinye iivenkile, kodwa ungafumana enye yazo kwiivenkile ezithile ezikhethekileyo okanye kumaqonga entengiso akwi-Intanethi. Umzekelo, nazi izimvo zokuthenga:
- Nobsound, isikrini esintsonkothileyo ukubonisa amanqanaba esandi xa usidibanisa nesiphumo sesandi. Isikrini sinesisombululo sezinto ezikhanyayo ze-15x15.
- Kongnijiwa, analog kwinqanaba eliphezulu imitha.
- 2 yeemitha kunye nePCB ukuqhagamshela kwimveliso yokukhulisa iiprojekthi zakho.
- Imitha yenqanaba le-stereo ene-2x15 LEDs.
- Velleman MiniKits elula kwinqanaba lemitha ye-LED
- Enye enye into efana naleyo yangaphambili inee-LED eziluhlaza, kunye nomthubi nobomvu ukumakisha imiqulu ephezulu.
- I-Tiamu, inqanaba lemitha elilula kunye ne-LM3915 chip kunye nee-LED.
Yakha imitha yomgangatho owenziweyo
Unayo iindlela ezahlukeneyo zokwakha imitha yomgangatho ngendlela elula kakhulu. Enye yazo nge-IC LM3914, i-LM3915, okanye i-LM3916. Iichips ezimbini ezithandwayo kwihlabathi le-elektroniki. Ukongeza kule chip, njengoko ubona kumfanekiso ongaphambili, uya kudinga ii-LEDs zemibala oyikhethileyo ukubonisa inqanaba levolumu ngokubonakalayo, kunye nezinye izinto ezongezelelekileyo ezinje ngee-resistors, i-potentiometer kunye ne-capacitor.
Ukuyiqonda ngcono indibano yayo, ungasebenzisa enye yezi iividiyo zokufundisa apho bayichaza inyathelo ngenyathelo:
Ukwanazo nezinye iindlela onokukhetha kuzo, njengale enye elula oyisebenzisayo iindlela ezimbini ze-LED yestereo:
Kulesi enye ayisebenzileyo ii-ICs ezintathu endikhe ndacaphula apha ngasentla ukujonga iziphumo kuyo nganye: