Cov txheej txheem:
- Kauj ruam 1: Disassembly ntawm lub teeb
- Kauj Ruam 2: Xeem Tus Tsav Tsheb Tso Tawm Voltage
- Kauj Ruam 3: Hloov kho Boost Converter - Theory
- Kauj Ruam 4: Hloov kho Boost Converter - Siv Tau
- Kauj ruam 5: Reassembly ntawm lub teeb
Video: Hloov 230V AC Qij rau USB Lub Hwj Chim!: 6 Kauj Ruam (nrog Duab)
2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:24
Los ntawm Seán WalshFollow Ntxiv los ntawm tus sau:
Hais txog: Khoom siv hluav taws xob, kev siv hlau, kev ua haujlwm thiab tinkering Ntau Ntxiv Txog Seán Walsh »
Kuv tau hla cov teeb ci zoo li lub teeb ntawm eBay, uas flicker thiab muaj qhov hloov pauv me me ua nyob rau hauv. Lawv feem ntau siv los ntawm 85-265V AC lub ntsiab lus nkag, tab sis rau cov ntawv thov nqa tau zoo li lub nplaim taws taws lossis lub teeb no tsis zoo.
Kuv hloov lub teeb kom tsis txhob siv lub zog qub, cov qij no tuaj yeem siv tau los ntawm 5V cov khoom, ncaj los ntawm ib lub roj teeb li-ion, lossis txawm tias los ntawm 2-3 AA roj teeb.
Kauj ruam 1: Disassembly ntawm lub teeb
Cov tsev nyob saum toj kawg nkaus tsuas yog kaw rau, nrog me ntsis ntawm prying nws popped tawm los qhia AC-DC tus tsav tsheb, thiab nyob rau lwm sab ntawm lub rooj tsavxwm, yooj ywm PCB tau muab tso rau nws.
Cov PCB uas hloov pauv tau muaj lub microcontroller thiab LED array soldered rau nws ua ntej nws tau muab dov thiab muab tso rau hauv qhov chaw. Ua tib zoo saib ntawm PCB no, tsuas muaj ob txoj kev txuas hluav taws xob mus rau lub rooj tsav tsheb los ntawm DC qhov tso tawm sab. Yog tias qhov hluav taws xob tau siv rau cov kev sib txuas uas zoo ib yam li AC-DC tsav tsheb tso tawm qhov hluav taws xob, tom qab ntawd lub teeb yuav tsum ua haujlwm zoo.
Cov hlau kawg ntawm lub qhov muag tuaj yeem pried tawm, nthuav tawm AC Live kev sib txuas tsuas yog pinched nyob rau hauv qhov chaw tiv thaiv cov yas.
Kauj Ruam 2: Xeem Tus Tsav Tsheb Tso Tawm Voltage
Txhawm rau ntsuas qhov hluav taws xob tso tawm kom nyab xeeb, Kuv tau siv ob lub xov hlau mus rau DC tso tawm thiab qhwv lawv ib ncig ntawm kuv DMM ua raws li daim duab. Tom qab ntawd kuv tau siv lub teeb thiab tshawb xyuas DMM kom pom tias qhov hluav taws xob nyob ib puag ncig 6.3V.
Kuv cia siab tias nws yuav yog 5V, tab sis qhov siab dua me ntsis ua rau muaj kev nkag siab zoo li khub ntawm LEDs tuaj yeem tsav ua ntu nrog ~ 6V. Qhov no ua rau hloov lub teeb me ntsis kom yooj yim txawm li cas los xij vim kuv tsis muaj qhov hloov pauv hloov pauv ntawm tes uas yuav haum rau hauv paus ntawm lub teeb.
Kauj Ruam 3: Hloov kho Boost Converter - Theory
Kuv muaj qhov kev hloov pauv hloov pauv no tso ib puag ncig thiab tom qab saib cov ntaub ntawv ntawm IC, Kuv paub tias kuv tuaj yeem hloov kho nws rau kuv cov kev xav tau.
Qhov kev hloov pauv ntxiv no muab qhov ruaj khov 5V tso tawm los ntawm txhua qhov hluav taws xob hauv 2.5V txog 4.5V ntau. Txij li thaum kuv xav tau ~ 6.3V ntawm qhov tso tawm thiab tsis yog 5V qhov qauv no yuav tsis ua haujlwm zoo ib yam.
Hauv daim duab saum toj no ntawm Circuit koj tuaj yeem pom tias IC tswj hwm qhov hluav taws xob los ntawm kev tawm tswv yim ncaj qha los ntawm cov zis (kab tuab). Yog tias qhov faib hluav taws xob tau muab tso nruab nrab ntawm hauv av thiab qhov hluav taws xob tso tawm, thiab lub node ntawm qhov faib hluav taws xob tau txuas nrog "VOUT" tus pin ntawm IC, tom qab ntawd peb yuav tsum tuaj yeem dag IC hauv kev tswj hwm saum nws cov teeb tsa.
Rau qhov kev hloov pauv loj rau qhov tso tawm qhov hluav taws xob, lwm yam khoom siv xws li cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob yuav tsum tau hloov pauv, tab sis raws li kuv tab tom nce qhov hluav taws xob tsuas yog me ntsis, tsis tas yuav hloov dab tsi ntxiv.
Kauj Ruam 4: Hloov kho Boost Converter - Siv Tau
Tom qab tshem lub USB jack, Kuv desoldered IC kom ua tib zoo saib ntawm kev teeb tsa ntawm kev txhawb nqa PCB.
Tus pin nruab nrab "VOUT" txuas nrog lub tab ntawm IC, yog li kuv txiav cov tooj liab cais qhov kev sib txuas no los ntawm lwm lub rooj tsavxwm. Kuv xam qhov muaj nuj nqis resistor thiab xaiv cov resistors ze kuv muaj ntawm tes; 220kOhm thiab 50kOhm los tsim qhov faib hluav taws xob.
Cov resistors no tom qab ntawd tau muab sib dhos ua ke hla cov txiaj ntsig ntawm lub zog hloov pauv, thiab cov node nruab nrab tau muab txuas rau VOUT tab ntawm IC raws li qhia.
Kuv thov 5V rau lub rooj tsavxwm los ntawm lub zog hluav taws xob thiab ntsuas qhov tso tawm hluav taws xob ntawm 6.56V. Qhov kev nyeem ntawv no siab dua qhov kuv xav tau, tab sis raws li muaj tus tswj zener rau lub microcontroller qhov no yog qib uas siv tau.
Kauj ruam 5: Reassembly ntawm lub teeb
Nrog cov hlau kawg hau tshem tawm, xaim tuaj yeem hla dhau lub qhov me hauv lub hauv paus. Hauv qhov no kuv qhia luv USB cable uas tau siv, tab sis koj kuj tseem tuaj yeem siv lwm hom cable rau txuas ncaj qha rau roj teeb.
Kuv tau khi ib txoj hlua hauv USB cable rau nyem nyem, txoj hlua khi yuav ua haujlwm ib yam nkaus. Qhov kawg ntawm USB cable tau muab txuas rau qhov hloov pauv hloov pauv uas tom qab ntawd txuas ncaj qha mus rau lub teeb DC sab.
Nco ntsoov tias kuv tawm ntawm AC-DC cov khoom siv hluav taws xob hauv lub teeb vim nws tuav PCB yooj ywm ua ke, nws tsis ua haujlwm lwm lub hom phiaj thiab tuaj yeem raug tshem tawm tag nrho hauv kev teeb tsa no.
Nyem txhua yam rov qab rau hauv qhov chaw, koj tau tshuav nrog lub teeb pom kev zoo nrog lub xov tooj cua ntsaws tawm qhov kawg. Kuv kuj tau tsim ib qho nrog 2 tus pin JST txuas uas tuaj yeem txuas nrog lub roj teeb uas koj xaiv - qhov no kuv tau mus nrog kev tiv thaiv 18650 ntawm tes uas muaj qhov sib txuas JST txuas.
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