Nce Tam Sim No ntawm 78xx Cov Cai Tswj: 7 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:30

Feem ntau 78xx series cov tswj hwm muaj peev xwm tshaj plaws tam sim no muaj peev xwm ntawm 1 txog 1.5 Amperes. Siv qhov kev tsim qauv no koj tuaj yeem ua ob zaug qhov siab tshaj tam sim no ntawm koj li 78xx tus tswj hwm. Qhov kev tsim no tau tshaj tawm hauv Net los ntawm I Hakki Cavdar ntawm Karadeniz Technical University, Trabzon, Qaib Cov Txwv. Kuv tau tshuaj xyuas qee qhov ntawm cov khoom muaj txiaj ntsig vim muaj kev txhawj xeeb txog cua sov thiab kom haum rau kuv daim ntawv thov. Daim duab #2 yog daim duab qhia chaw.

Kauj Ruam 1: Npaj Cov Cheeb Tsam & Circuit Board

Cov Ntawv Teev Npe: IC1 thiab IC2 - 78xx series tus tswj hwm IC (7805 rau 5V, 7812 rau 12V thiab lwm yam) D1, D2 & D3- 1N4003 (3 Amp Diodes) D4 & D5 - Lub Teeb Emitting Diodes (LED) ** R1 & R2 - 4.7 K, 1/2 watt resistor ** C1 & C2 - 4700 uF / 16V electrolytic capacitorC3 - 47, 000 uF / 35V electrolytic capacitorPrinted Circuit Board (PCB) Etching SolutionWaterProof marker ** - Cov khoom siv xaiv tau txiav tawm Circuit Board Board siv hacksaw, nyem daim duab kom pom zoo dua. Siv cov cim dej tsis sib haum, kos qhov no mus rau sab tooj ntawm daim phiaj hluav taws xob- luam daim duab RED. Nco tseg ntawm tus pin nyob deb ntawm cov khoom siv kom tso lawv tom qab ntawd yuav yog cua. Muab cov PCB tso rau hauv Etching tov thiab tos kom txog thaum koj pom daim hlau tsis muaj tooj liab (ncig 20 feeb). Yaug PCB nrog dej. Ntxuav Cov Cim Cim Nrog Acetone kom nthuav tawm tooj liab. Laum lub qhov rau cov khoom siv thiab koj lub PCB npaj txhij mus.

Kauj Ruam 2: Teeb duab hauv Copper Clad Board

Kos tus qauv txheej txheem ntawm sab tooj liab siv tus cim dej tsis sib haum. Lwm daim duab yog nws zoo li nyob rau lwm sab.

Kauj ruam 3: Etching

Tom qab ntawv pov thawj nyeem koj daim duab, tsau nws hauv Etching Solution. Kuv siv Ferric Chloride ua nws.

Kauj ruam 4: Tom qab Etching

Cov tooj liab kos nrog tus cim tseem tshuav. Ntxuav nws nrog Acetone kom tshem tau tus cim cim tus lej thiab nthuav tawm tooj liab.

Kauj ruam 5: Drilling

Laum cov khoom tiv thaiv thiab koj ua tiav nrog PCB.

Kauj Ruam 6: Muab thiab Muab Tshuaj Txhuam Txhuam

Hauv kev tso cov khoom, Kuv ib txwm tso cov resistors ua ntej, qhov no R1 thiab R2. Tom ntej no yog lub capacitors C1, C2 thiab C3, thov nco ntsoov txheeb xyuas qhov tsis sib xws ntawm lawv tus pin (koj tuaj yeem tshawb xyuas qhov no los ntawm kev nyeem cov yas npog ntawm lub capacitor, feem ntau nws nyob ntawd) kom zam koj lub tshuab hluav taws xob tshuab. Koj yuav tsis xav tau cov kua kub thiab ntau daim ntawv shreds hauv koj lub ntsej muag. Tom ntej no, yog txhawm rau txhawm rau LEDs D4 thiab D5, rov ua qhov nco ntawm lawv tus pin polarities (anode thiab cathode), qhov no yuav tsis tshuab yog hais tias polarities tsis raug, tsuas yog nws yuav tsis pom kev. Thaum kawg ntxig diodes D1, D2, D3 thiab 2 tus tswj hwm.

Thaum tag nrho cov khoom siv nyob rau hauv qhov chaw, ob zaug xyuas lawv cov polarities dua thiab koj npaj tau. Muab PCB tso rau sab nraud nthuav tawm sab tooj nrog cov pins tivthaiv. Hauv kuv qhov kev paub, nws zoo dua los txhawm rau ua cov khoom ua ntej ua ntej txiav cov pins ntau dhau tab sis qee tus neeg kuv paub yog qhov yooj yim dua txiav cov pins thawj zaug ua ntej yuav laug, yog li qhov no yog nyob ntawm koj nyiam. Ntxuav tag nrho cov pins tshaj tawm los ntawm thaj chaw soldered thiab koj npaj txhij rau kev sim koj txoj haujlwm.

Kauj Ruam 7: Kev Xeem thiab Lwm Yam Qauv

Qhov kev sib tw no yooj yim heev rau kev sim, tsuas yog txuas lub hwj chim rau cov tswv yim ntawm C1. Nco ntsoov tias cov tswv yim hluav taws xob yuav tsum siab dua qhov koj xav tau. Piv txwv li, yog tias koj xav tau 12V cov zis, koj qhov hluav taws xob yuav tsum zoo ib yam li 16 Volts lossis siab dua - 78xx tus tswj hwm tuaj yeem tswj cov hluav taws xob nkag mus txog 35V. Yog tias txhua yam mus zoo, koj 2 LEDs yuav ci. Yog tias nws tsis yog, txheeb xyuas seb puas muaj qhov hluav taws xob los ntawm koj cov zis nrog Multimeter tom qab ntawd txheeb xyuas LED tus pin. Cov txiaj ntsig ntawm qhov kev sib tw no yog nyob ntawm koj li 78xx tus tswj hwm, hais tias koj txuas nrog 7812 tus tswj hwm, cov zis yuav tsum yog nyob ntawm thaj tsam ntawm 11.3 txog 11.5 Volts. Kuv tau ntxiv cov rhaub kom txaus kom tiv thaiv kev ua kom sov ntawm tus tswj hwm. Kuv txuas qhov no rau kuv lub wireless router thiab nyob ruaj khov tom qab txhawb nws li 2 hnub ncaj. Kuv pom lub kiv cua CPU me me thiab ntxiv nws kom txo tau cua sov ntxiv, txawm hais tias nws tsis tsim nyog, kuj tseem yuav siv tau nws.