LM7805: zonse zokhudzana ndi woyang'anira magetsi

LM7805

El LM7805 ndi woyang'anira magetsi, koma osasokonezedwa ndi ogawa magetsi zomwe tidakambirana kale m'nkhani ina yapita. Kuphatikiza apo, sikuti ndiwowongolera zamagetsi zilizonse, koma ndi imodzi mwazomwe zimagwiritsidwa ntchito kwambiri ndi opanga komanso mapulojekiti a DIY amitundu yonse. Ntchito yake, monga dzina lake likusonyezera, ndikuwongolera mayendedwe amagetsi oyendetsa dera lomwe limaphatikizidwa.

Gawo lomwe silimayamikiridwa nthawi zonse komanso lomwe, nthawi zina, limagawidwa pazinthu zambiri. Koma ndizotheka Ndikofunikira ngati mukufuna siginecha yamagetsi. Chofunika kwambiri ndi LM7805 popanga magetsi oyendetsa madera athu. Mwachitsanzo, kuti mupange magetsi omwe amadzipangira okha okhala ndi mawonekedwe ena, imodzi mwazoyang'anira izi sikuyenera kusowa.

Kodi woyang'anira magetsi ndi chiyani?

Dera lamkati la LM7805

Un voteji kapena woyang'anira pamagetsi ngati LM7805 ndichida chomwe chimatha kusintha chizindikiro chamagetsi imafika pakulowetsa kwake ndikupereka siginecha yamagetsi panjira yake. Pomwe zimatuluka, ma voliyumu nthawi zambiri amakhala otsika komanso amakhala ndi mawonekedwe ena omwe amafunika kupewa zoopsa kapena dera lomwe limadyetsedwa kuti lizigwira bwino ntchito, ngati likugwirizana ndi kusiyanasiyana kwamagetsi.

Kuti izi zitheke, woyang'anira magetsi ali nawo dera lamkati lokhala ndi ma resistor angapo ndi ma transistors oipidwa mozungulira yolumikizidwa kotero kuti imalola kuti ikwaniritse bwino chizindikiro cha magetsi m'njira yoyenera. Mutha kuwona dera lamkati lomwe limaphatikizidwa ndi phukusi la chipangizochi pamwambapa.

Msika pali mitundu yosiyanasiyana yamagetsiinde, ambiri a iwo ndi otchipa kwambiri. Kupatula LM7805 mupezanso 7809, 7806, 7812, ndi zina zambiri, kuchokera kubanja la 78xx. Ngakhale m'nkhaniyi tikambirana za 7805, pokhala m'modzi wotchuka kwambiri.

La kusiyana pakati pamagetsi owongolera ndi ogawa mavuto ndi omveka. Wopatulirawo amagawa magetsi olowera m'magawo angapo otsika kuposa omwe amatulutsa, koma samakonza chizindikirocho. Kumbali inayi, pamagetsi oyendetsa magetsi, pamafunika mphamvu yamagetsi yofananira, koma ndi chizindikirocho molondola kuposa momwe zimapezidwira.

Ntchito zamagetsi zamagetsi

Chizindikiro kuchokera pamagetsi

Monga momwe mungaganizire, IC ngati LM7805 itha kugwiritsidwa ntchito pazinthu zambiri. Mwachitsanzo, magetsi nthawi zambiri amaphatikiza imodzi mwa mndandanda wa 78xx. M'malo mwake, magetsi, monga tidafotokozera m'nkhani yapita, amapangidwa ndi magawo angapo:

  • Kusintha: ndizotheka kusintha magetsi olowera 220v kuti akhale abwino 12, 6, 5, 3, 3.3 kapena phindu lililonse.
  • Wokonza Bridge: ndiye chizindikirocho chidzakhala ndi magetsi oyenera, koma chidzapitilizabe kukhala chizindikiritso china, mutadutsa pa mlathowu chizindikirocho chimapewa.
  • Otsatira: tsopano chizindikirocho chimakhala ndi mawonekedwe a milu, ndiye kuti, zamagetsi zina zomwe zimati zikudutsa mu capacitor zidzasalala, kukhala pafupifupi mzere wowongoka.
  • Woyang'anira mavuto: pomaliza pake, woyang'anira adzawongolera chizindikirocho kuti chikhale chokhazikika komanso chokhazikika, ndiye kuti, kuti chizikhala chizindikiro chamakono.

Zina chitsanzo cha ntchito woyang'anira mphamvu zamagetsi akhoza kukhala kudyetsa maseketi ena ophatikizika omwe sangadyetsedwe ndi chizindikiritso choposa chiwerengero china. Mwachitsanzo, taganizirani kachipangizo kapena chip chomwe sichingadutse 3.3v mphamvu. Pachifukwa ichi, wowongolera amatha kugwiritsidwa ntchito popewa zoopsa zopitilira cholepheretsacho. Mphamvu zonse zimawonongedwa ngati kutentha ndi 78xx.

Nkhani yowonjezera:
LM317: zonse zokhudzana ndi kusintha kwamagetsi kwamagetsi

7805: pinout ndi datasheet

Pepala la 7805

Pali opanga osiyanasiyana a LM7805, monga STMicroelectronics, TI, Sparkfun, ndi zina. Kuphatikiza apo, mutha kuzipeza phukusi lachikhalidwe komanso gawo kuti zisakhale zosavuta kuphatikizira muzinthu zanu ndi Arduino. Kutengera mtundu womwe mwagula, ndikukulangizani kuti mupeze tsamba lovomerezeka la wopanga kuti muwone momwe zilili ma datasheets apadera kwa mtunduwo. Kumbukirani kuti ngakhale onse ali ofanana, pakhoza kukhala zosintha kuchokera pakupanga wina kupita ku wina.

Ngati mugula mu phukusi la TO-220, mupeza pini ya pini 3. Zili ndi manambala ndipo imodzi ikufanana ndi kulowetsa kwamagetsi komwe mukufuna kusintha, awiri apakati ndi GND kapena nthaka (wamba), chikhomo chachitatu ndichopanga mphamvu yoyendetsedwa kale, ndiye kuti chizindikiro chokhazikika tidzagwiritsa ntchito popereka dera lovuta lomwe tikufuna kupanga ntchito. Koma muyenera kuwonjezera zina zowonjezera monga ma capacitors monga akuvomerezera ndi wopanga kuti zotulutsa zikhale zokwanira.

LM7805 Module ya Arduino

Pankhani ya gawoli, ndiokwera mtengo pang'ono, koma zitha kupangitsa kuti zinthu zisakuvutireni. Mulinso chida cha 7805 komanso zinthu zina zomwe inu apangitsa kuti zikhale zosavuta kugwiritsa ntchito ndi Arduino. Simusowa ma capacitors owonjezera kapena china chilichonse. Kuphatikiza apo, imaphatikizaponso heatsink kuti isunge kutentha koyenera pochotsa kutentha komwe kumapangidwa ndi 78xx ndi makhadi awiri olumikizirana kuti athandizire ndi kutulutsa (Vcc ndi GND kumapeto kulikonse), kuthandizira kukhazikitsa kwake.

Mitundu ina

ndi Kusiyana pakati pa mitundu yosiyanasiyana yomwe ikupezeka mndandanda wa 78xx yamagetsi yamagetsi ndiosavuta. Chiwerengero chomwe chimatsagana ndi banjali chikuwonetsa kuchuluka kwamagetsi omwe amathandizidwa ndi woyang'anira aliyense. Mwachitsanzo:

  • LM7805: 5v ndi 1A kapena 1,5A nthawi zina.
  • LM7806: 6v
  • LM7809: 9v
  • LM7812: 12v

Kumene angagule

Ngati mukufuna kugula, muli nayo pa Amazon, kuphatikiza pama sitolo ena apadera a zamagetsi. Mitundu iwiri yomwe mungagule ndi:

  • Palibe zogulitsa. Mu phukusi TO-220 la € 4 mutha kugula 10 yazida izi.
  • LM7805 mu module ya pansi pa € ​​6 pa unit.

Monga mukuwonera, ali zipangizo zotsika mtengo...

Kuphatikiza ndi Arduino

Ngati mungaganize phatikizani ndi projekiti ndi Arduino kapena Raspberry Pi kapena mtundu wina wa bolodi, Palibe vuto. Simusowa kugwiritsa ntchito malaibulale ena monga ma module ena, komanso simufunika kuwonjezera ma code ena mu Arduino IDE yanu, popeza 78xx iyi imadzilamulira yokha ndipo imangodzipereka kuti isinthe mayendedwe amagetsi. Muyenera kukhala ndi chidziwitso chamagetsi chokhacho kuti muchiyike pamalo oyenera m'dera lanu ...


Zomwe zili m'nkhaniyi zikutsatira mfundo zathu za malamulo okonzekera. Kuti mufotokoze cholakwika dinani Apa.

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