Imodyuli I-ACS712 yisixazululo sokonga ukwazi ukukala okukhona manje kumasekethe akho e-DIY. Njengomenzi, kungadingeka ukuthi ugcine ithrekhi yamanje kumjikelezo. Kulokhu, uzothanda le ngxenye engikulethela yona. Inzwa izobona inani lamanje bese iletha amandla okukhipha amandla ngokulingana nokudonswa kwamanje. Ngaphezu kwalokho, njengoba isivele ihlanganiswe nemodyuli, yenza ukuxhumana kube lula kakhulu, ngamathebhu wokuxhuma nakho konke okudingayo ukukusebenzisa ngaphandle kokungeza izinto eziningi ezengeziwe.
Izinsizakusebenza zedivayisi ziningi njengoba uzokwazi ukuzihlola, noma ngabe unamandla ahlukile kusifunda, ngoba uzokwazi ukukhetha izinhlobo ezahlukahlukene ze-ACS712 akhona. Isibonelo, i-ACS712-05A, i-ACS712-20A, i-ACS712-30A, njll., Kumabanga wamanje we-5A, 20A no-30A, ngokulandelana.
Umphumela weHholo
Wikipedia
El I-ACS712 isebenza ngenxa yomphumela weHholo. Ngayo ungalinganisa amandla kazibuthe nemisinga, njengoba kunjalo. Lapho i-current igeleza ngenzwa yeHholo, futhi isondela kunkambu kazibuthe egeleza iqonde ngqo enzwa, khona-ke izokwakha i-voltage ephumayo ngokulingana nomkhiqizo wamandla kazibuthe wamanje nowamanje. Ngakho-ke, ngokwazi amandla kazibuthe, inani lamanje kumqhubi noma kwekhoyili lingalinganiswa.
I-Las Izicelo zomphumela weHholo Kuningi, kusuka kumitshina wensimbi, izilinganiso zamanje, izilinganiso zikazibuthe kazibuthe, njenge-emitter yesiginali engeyona yokuxhumana, isilinganiso sobukhulu bensimbi, njll.
Izici ze-ACS712
El Imodyuli ye-ACS712 ilula kakhuluNgokuya ngomphumela weHholo, ine-pinout elula kakhulu. Ngakolunye uhlangothi ubona izikhonkwane ezintathu bese ngakolunye ithebhu yokuxhuma enemigqa emibili ofuna ukukala amandla wamanje wesekethe. Izikhonkwane ezintathu kulapho kuxhunywa khona amandla. Njengoba kukhonjisiwe esithombeni ngenhla, ukusuka kwesobunxele kuye kwesokudla, une-Vcc, okukhiphayo phakathi nendawo lapho kukalwa khona, ne-GND iqhakazile kakhulu kwesokudla.
Ngokuya ngemodeli, ungakala ukukala okukodwa noma okunye kwama-amperes wamanje, nge izinhlobo ezintathu I-ACS712 eyisisekelo:
- Ingxenye #: ACS712ELCTR-05B-T: efinyelela ku -5 no-5A wobukhulu obubekezeleleke kakhulu. Ngokuzwela kuka-185mV / A.
- Ingxenye #: ACS712ELCTR-20A-T: kuleli cala lisukela ku -20 liye ku-20A, ngokuzwela okungu-100mV / A.
- Ingxenye #: ACS712ELCTR-30A-T: inyuka iye ebangeni le-30 kuye ku-30A, ngokuzwela kwe-66mV / A.
Uma lokho sekwaziwa, kufanele ukhumbule ukuthi ekuphumeni kukunikeza i-voltage noma Amandla we-2.5v uma i-current yamanje isetshenziswa ngu-0A. Ukusuka lapho, kuya ngokuthi iyinegethivu noma inhle, izokhuphuka noma yehle kulelo voltage. Umugqa oqondile ungadonselwa kwigrafu ngokubeka i-voltage ne-current ku-ordination ne-abscissa, ukuthambekela kwethambeka kungukuzwela kwalamamojula ngamunye.
Ngakho-ke, uma sazi ukuthi kungama-volts angu-2.5, ungasebenzisa ifomula V = SI + 2.5. Lapho i-S ithambeka elilingana nokuzwela. Ukuxazulula lokhu ukuthi kube nakho njengokuqina, kungashiwo lokho Mina = V-2.5 / Ukuzwela. Okungukuthi, i-voltage isuse u-2.5 futhi ihlukaniswe ngozwela. Lokhu kufanele ukubheke ukuze ulinganisele kamuva i-Arduino microcontroller lapho uyihlela.
I-pinout, i-datasheet nokuthi ungathenga kuphi
para ukuxhumana kwakho ne-Arduino, ilula kakhulu ngenxa ye-pinout, Vele uxhume iphini ye-GND yebhodi lakho Arduino UNO nge-GND yemodyuli ye-ACS712, iphini engu-5v ye-Arduino ene-Vcc yemodyuli, kanye nomaphakathi (okukhiphayo) nokunye kokufakwayo kwe-Arduino, ngokwesibonelo, u-A0. Futhi ngalokho, isifunda besivele siphelele, ngokungabi khona kokuxhuma isekethe elihlinzeka ngamandla ofuna ukuwalinganisa kuthebhu eluhlaza.
Khumbula ukuthi ungayithola kumikhiqizo ehlukene, futhi ngiyakweluleka bona i-datasheet yakho ukuze ufunde kabanzi mayelana nezici ezithile ezingaba nazo le mojule ethile ye-ACS712, yize imvamisa ifana kakhulu kubo bonke abenzi ... Uma ufuna ukubona isibonelo, nayi I-Allegro datasheet.
Yisho futhi ukuthi yini ungathenga kunoma yisiphi isitolo esikhethekile, noma kubathengisi abaningi be-inthanethi abanjenge-Amazon, ngamanani asuka ku- € 2 kuya ku- € 11 kuya ngemodeli, efana:
Isibonelo sohlelo lokusebenza ne-Arduino
Isibonelo esilula futhi esinconywe kakhulu ukuqala ukusebenzisa le nto yile xhuma i-ACS712 ebhodini lakho le-Arduino bese wenza ikhodi elula ye-Arduino IDE ukwenza izilinganiso zamanje. Faka amanye ama-probe, ukuhlolwa okuholela kwimultimeter engasasebenzi noma Ayikho imikhiqizo etholakele., futhi uzoba ne-ammeter elula ongayithinta ngamathiphu isekethe elincane bese unquma ukuthi kusebenza kangakanani ukushuba. Uma ungafuni ukuthenga noma ukuphenywa, ungasebenzisa izintambo ezimbili ezivikelwe nge-insulation enhle futhi ezimelana namandla ohlela ukuwalinganisa.
Thatha izixwayiso ezifanele, uma usebenza ngamandla aphakeme usebenzisa izinto ezivimbayo noma ungathola umonakalo omkhulu uma uhlaselwa ugesi. Ngaso sonke isikhathi sebenza ngokuqapha ... Bheka izici zemojuli yakho futhi ungadluli amanani wokuqina eyenzelwe yona noma izokonakala, futhi awudluli ubukhulu obukhulu lapho amaphenyo noma izintambo ozikhethile ingasebenza.
El ikhodi yomdwebo wakho we-Arduino IDE Kulula kanjalo:
//Ejemplo de código para medir intensidades para un ACS712 de 5A
float Sensibilidad=0.185; //Sensibilidad en Voltios/Amperio para sensor de 5A a 185mV/A
void setup() {
Serial.begin(9600);
}
void loop() {
float voltajeSensor= analogRead(A0)*(5.0 / 1023.0); //Para la lectura del sensor
float I=(voltajeSensor-2.5)/Sensibilidad; //Fórmula para obtener la corriente o intensidad medida con las puntas conectadas al módulo ACS712
Serial.print("La intensidad en Amperios es de: ");
Serial.println(I,3);
delay(200);
}
Ukucabangela
Khumbula Uma uxhume okukhiphayo kwemodyuli ye-ACS712 kokufaka okuhlukile, kufanele ushintshe i-A0 iye kuphini elifanele. Futhi kuyafana uma usebenzise imodyuli engu-20A noma engu-30A, kufanele ushintshe inani lesimemezelo sokuqina kobuzwe kube ngu-100 noma u-66.
Ungakwazi futhi shintsha amafomula ukuze idatha ebuyisiwe kusuka kuzilinganiso ingaphansi kwama-amps, njenge-mA, uma ilungele ukusetshenziswa kwephrojekthi yakho. Futhi ungaguqula ukubambezeleka ukuze kwenze izilinganiso ngokulandelana kakhudlwana noma njalo isikhathi eside, njengoba udinga ukukulawula. Ungafaka izihlungi ngaphakathi kwekhodi ukuthola izilinganiso, uzilinganise, njll.
Izinto eziningi okufanele uzicabangele ukuthi uma ukwazi i-voltage neyamanje, unga khiqiza amafomula Kwikhodi yokudweba ukubala amanye amapharamitha, njengokumelana nomthetho ka-Ohm, ungathola futhi amandla kuma-watts (w) ngokwazi le mingcele, njll. Usuvele uyazi ukuthi umkhawulo umcabango wakho ... kahle, kanye nemikhawulo yobuchwepheshe obusebenzisayo.
Uyakwazi lokho uma ufuna funda kabanzi mayelana nokuthi ungaluhlela kanjani i-Arduino, une ibhukwana lokuqalisa nge-PDF futhi mahhala ukulanda lapha.