LM7805: txhua yam hais txog qhov ntsuas hluav taws xob

LM7805

El LM7805 yog qhov ntsuas hluav taws xob, tab sis kom tsis txhob tso siab rau lub ntsuas hluav taws xob uas peb twb tau tham txog hauv lwm cov ntawm peb cov ntawv dhau los. Tsis tas li ntawd, nws tsis yog txhua tus neeg tswj hwm qhov voltage, tab sis nws yog ib qho siv ntau tshaj plaws los ntawm kev tsim khoom thiab hauv DIY cov phiaj xwm ntawm txhua yam. Nws txoj haujlwm, raws li nws lub npe hais tawm, yog kom tswj lub teeb liab voltage ntawm lub Circuit Court uas nws sib koom ua ke.

Kev tivthaiv uas tsis yog ib txwm muaj txiaj ntsig zoo thiab qhov ntawd, muaj qee zaum, tau faib rau ntau yam haujlwm. Tab sis hais tias yog heev tseem ceeb yog tias koj xav tau lub teeb liab hluav taws xob ruaj khovCov. Qhov tshwj xeeb tseem ceeb yog LM7805 thaum tsim kom muaj lub zog hluav taws xob rau peb lub voj voog. Piv txwv li, txhawm rau tsim cov hluav taws xob tsis muaj hluav taws xob nrog qee cov yam ntxwv, ib qho ntawm cov neeg tswj hwm no yuav tsum tsis txhob ploj mus.

Dab tsi yog qhov ntsuas hluav taws xob?

LM7805 sab hauv Circuit Court

Un qhov hloov hluav taws xob lossis qhov ntsuas hluav taws xob zoo ib yam li LM7805 yog ib qho khoom siv uas muaj peev xwm hloov qhov ntsuas hluav taws xob nws tau ntawm nws cov tswv yim thiab xa cov hluav taws xob hluav taws xob sib txawv ntawm nws cov zis. Ntawm cov zis ntawd, qhov hluav taws xob feem ntau yuav qis dua thiab nrog qee yam ntxwv uas yuav tsum tau ua kom tsis txhob muaj kev pheej hmoo lossis rau qhov Circuit Court uas nws tau pub kom ua haujlwm kom raug, yog tias nws nkag siab txog hluav taws xob hloov.

Yuav ua kom qhov no ua tau, qhov ntsuas hluav taws xob muaj sab hauv hluav taws xob sab hauv nrog cov ntsuas tiv thaiv thiab transistors bipolar txuas nrog rau hauv txoj hauv kev uas nws tso cai ntsuas lub teeb liab voltage nyob rau hauv txoj kev haum. Koj tuaj yeem pom cov hluav taws xob sab hauv uas tau muab sib xyaw rau pob ntawm cov khoom no hauv daim duab saum toj no.

Movilideas 10 Chav Nyob ...
Movilideas 10 Chav Nyob ...
Tsis muaj kev txheeb xyuas

Hauv khw muaj ntau txoj cai sib txawv voltagetau, feem ntau ntawm lawv cov khoom pheej yig heev. Sib nrug ntawm LM7805 koj tseem yuav pom 7809, 7806, 7812, thiab lwm yam, los ntawm 78xx tsev neeg. Txawm hais tias hauv tsab xov xwm no peb yuav tsom rau 7805, ua ib tus nyiam tshaj plaws.

La qhov txawv ntawm qhov ntsuas hluav taws xob thiab qhov sib faib nro yog tseeb. Cov zauv faib tau faib cov xaim hluav taws xob mus rau ntau lub ntsuas hluav taws xob qis dua nws cov zis, tab sis tsis kho cov teeb liab rau qhov voltage. Ntawm qhov tod tes, nyob rau hauv qhov ntsuas hluav taws xob, qhov ntsuas hluav taws xob zoo ib yam ntawm qhov tsim tawm, tab sis nrog cov teeb liab muaj tseeb ntau dua li uas tau txais ntawm nws cov inputs.

Kev siv lub tshuab hluav taws xob ntsuas kub

Daim phiajcim los ntawm kev ntsuas hluav taws xob

Raws li koj tuaj yeem xav, IC zoo li LM7805 tuaj yeem siv rau ntau yam. Piv txwv li, cov khoom siv fais fab lawv feem ntau ua ke ib qho ntawm 78xx series. Qhov tseeb, lub hwj huam hluav taws xob, raws li peb tau piav qhia hauv tsab xov xwm dhau los, yog ua los ntawm ntau theem:

  • Hloov pauv: nws muaj peev xwm hloov pauv qhov input voltage ntawm 220v mus rau ib qho haum ntawm 12, 6, 5, 3, 3.3 lossis txhua tus nqi.
  • Choj rectifier: tom qab ntawd lub teeb liab yuav muaj qhov tsim nyog voltage, tab sis nws yuav txuas ntxiv ua ib qho teeb liab txuas ntxiv, tom qab dhau ntawm tus choj no lub teeb liab tsis zoo yog zam.
  • Peev Xwm: tam sim no cov teeb liab muaj cov duab ntawm mounds, uas yog hais, ntawm qee qhov voltage impulses uas thaum dhau ntawm tus capacitor yuav tau du, ua yuav luag ib txoj kab ncaj nraim.
  • Kev tswj qhov nruj: Thaum kawg, tus tswj hwm yuav kho qhov teeb liab ntawd kom ua rau nws tiaj tus thiab ruaj khov, uas yog, kom nws ua lub teeb liab ncaj qha tam sim no.

Lwm yam piv txwv daim ntawv thov ntawm qhov ntsuas hluav taws xob yuav yog kev pub rau qee cov kev sib xyaw ua ke uas tsis tuaj yeem noj nrog lub teeb liab uas tshaj li ib daim duab tshwj xeeb. Piv txwv li, xav txog qhov tsis pom lub zog lossis cov nti uas tsis pub dhau 3.3v ntawm lub zog. Zoo, qhov no, tus neeg tswj hwm tuaj yeem siv los ua kom tsis txhob muaj kev pheej hmoo ntawm qhov dhau qhov teeb meem ntawd. Tag nrho cov kev siv hluav taws xob ntau yog dissipated raws li cua sov los ntawm 78xx.

Tshooj lej:
LM317: txhua yam hais txog lub tshuab hluav taws xob tsim hluav taws xob hloov kho

7805: pinout thiab datasheet

Pinout ntawm 7805

Muaj ntau ntau cov tuam ntxhab ntawm LM7805, xws li STMicroelectronics, TI, Sparkfun, thiab lwm yam. Ib qho ntxiv, koj tuaj yeem nrhiav nws ob qho tib si hauv nws cov pob ib txwm thiab hauv ib qho qauv coj los ua kom yooj yim rau kev sib sau ua ke rau koj cov dej num nrog Arduino. Nyob ntawm cov qauv uas koj tau yuav, Kuv qhia koj kom nkag mus rau lub vev xaib ntawm lub khw tsim kom kuaj cov yam ntxwv hauv ntaub ntawv pov thawj tshwj xeeb rau tus qauv. Nco ntsoov tias txawm hais tias lawv txhua tus zoo sib xws, tej zaum yuav muaj qee qhov kev hloov ntawm ib lub chaw tsim khoom mus rau lwm qhov.

Yog tias koj yuav nws hauv TO-220 pob, koj yuav pom ib tus 3-nawj nawjCov. Lawv tau suav thiab ib qho sib thooj rau qhov ntsuas hluav taws xob koj xav tau kev hloov kho, qhov nruab nrab ob yog GND lossis hauv av (ib qho sib koom ua ke), tus lej thib peb yog rau kev tsim tawm ntawm qhov kev tswj hluav taws xob, uas yog, lub teeb liab ruaj khov uas peb yuav siv ua khoom siv ntawm cov hluav taws xob rhiab uas peb xav ua haujlwm. Tab sis koj yuav tsum tau ntxiv qee qhov ntxiv xws li capacitors raws li kev pom zoo los ntawm cov kws tsim khoom kom cov khoom tsim tawm txaus.

LM7805 Arduino Module

Nyob rau hauv cov qauv ntawm cov qauv, nws yog me ntsis kim kim, tab sis nws yuav ua rau tej yam yooj yim dua rau koj. Nws suav nrog cov khoom 7805 thiab kuj tseem muaj lwm yam khoom uas koj lawv yuav ua kom yooj yim rau siv nrog Arduino. Koj tsis tas yuav muaj lub zog tshwj xeeb lossis lwm yam. Tsis tas li ntawd, nws suav nrog lub heatsink los tswj lub ntsuas kub kom zoo los ntawm dissipating lub tshav kub tsim los ntawm 78xx thiab ob daim npav sib txuas rau cov tswv yim thiab tawm (Vcc thiab GND ntawm txhua qhov kawg), yooj yim rau nws siv.

Lwm cov qauv

lub qhov sib txawv ntawm cov qauv sib txawv muaj nyob rau hauv 78xx series ntawm voltage regulators yog yooj yim heev. Daim duab uas sib xyaw nrog tsev neeg no qhia txog qhov ntau tshaj plaws voltage txhawb los ntawm txhua tus tswj hwm. Piv txwv li:

  • LM7805: 5v thiab 1A lossis 1,5A qee kis.
  • L7806: wb
  • L7809: wb
  • L7812: wb

Qhov twg yuav

Movilideas 10 Chav Nyob ...
Movilideas 10 Chav Nyob ...
Tsis muaj kev txheeb xyuas

Yog koj xav yuav nws, koj tau muaj nws ntawm Amazon, ntxiv rau lwm lub khw muag khoom hluav taws xob tshwj xeeb. Ob qho sib txawv uas koj tuaj yeem yuav yog:

  • Cov khoom lag luam tsis pom. Hauv pob TO-220 rau € 4 koj tuaj yeem yuav 10 ntawm cov khoom siv no.
  • LM7805 hauv module rau tsuas yog qis dua € 6 ib chav tsev.

Raws li koj pom, lawv yog zoo nkauj pheej yig dua...

Kev sib xyaw nrog Arduino

Yog tias koj xav txog nws sib xyaw nrog ib qhov project nrog Arduino lossis Raspberry Pi lossis lwm hom board, Tsis muaj teeb meem dab tsi. Koj yuav tsis tau siv cov ntawv tshwj xeeb zoo ib yam li nrog lwm cov qauv, thiab koj yuav tsis ntxiv cov lej ntxiv hauv koj Arduino IDE, vim tias qhov no 78xx yog tus kheej thiab tsuas mob siab rau kev hloov kho cov ntsuas hluav taws xob. Koj yuav tsum tsuas yog muaj cov txuj ci tsim hluav taws xob uas tsim nyog los tso nws rau hauv qhov chaw raug rau hauv koj lub Circuit Court ...


Cov ntsiab lus ntawm tsab xov xwm ua raws li peb cov ntsiab cai ntawm kev tswj hwm kev ncaj nceesCov. Tshaj tawm ib qho yuam kev nyem no.

Yog thawj tus tuaj tawm tswv yim

Tso koj saib

Koj email chaw nyob yuav tsis tsum luam tawm. Yuav tsum tau teb cov cim nrog *

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  1. Lub luag haujlwm rau cov ntaub ntawv: Miguel Ángel Gatón
  2. Lub hom phiaj ntawm cov ntaub ntawv: Tswj SPAM, kev tswj xyuas tawm tswv yim.
  3. Sau raws cai: Koj kev tso cai
  4. Kev sib txuas lus ntawm cov ntaub ntawv: Cov ntaub ntawv yuav tsis raug xa mus rau lwm tus neeg thib peb tsuas yog los ntawm kev txiav txim siab raug cai.
  5. Cov ntaub ntawv khaws cia: Cov Ntaub Ntawv khaws tseg los ntawm Occentus Networks (EU)
  6. Txoj Cai: Txhua lub sijhawm koj tuaj yeem txwv, rov qab thiab tshem tawm koj cov ntaub ntawv.