Cov txheej txheem:
- Kauj Ruam 1: Rov Qab Engineering
- Kauj Ruam 2: Xeem Qhov Chaw Tshiab thiab Hloov Kho Cov Ntaus
- Kauj Ruam 3: Cov txiaj ntsig
Video: Hloov Cov Khoom Siv Hluav Taws Xob ntawm Cov Khoom Siv Hluav Taws Xob Pheej Yig: 3 Cov Kauj Ruam
2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:30
Cov lus qhia no qhia yuav hloov pauv li cas hauv lub zog hluav taws xob me me kom chnage qhov hluav taws xob tso tawm kom haum rau koj cov kev xav tau.
Rau DIY qhov project kuv xav tau qhov ruaj khov ntawm qhov tseeb 7V dc thiab txog 100 mA. Saib ib ncig ntawm kuv cov khoom sau Kuv pom lub dc lub zog me me los ntawm lub xov tooj txawb qub uas tsis tau siv. Lub hwj chim tau sau 5, 2V thiab 150mA sau rau nws. Qhov ntawd saib zoo tsuas yog qhov hluav taws xob xav tau los thawb me ntsis kom txog thaum nws yog 7V.
Kauj Ruam 1: Rov Qab Engineering
Ceev faj! Cov HAUJ LWM HAUJ LWM tseem muaj qhov siab tshaj yog tias kev qhia tawm sab nrauv tom qab siv! Nws tsuas muaj ib lub hau ntswj uas khaws cov ntaub ntawv ua ke. Tom qab qhib rooj plaub lub rooj sib tham me me tau ntog tawm … muaj ob peb qhov xwb. Nws yog qhov hloov pauv hluav taws xob yooj yim. Kev ruaj ntseg ntawm qhov hluav taws xob tso tawm yog ua tiav siv TL431. Nov yog tus tswj hwm shunt nrog qhov ntsuas hluav taws xob rov qab thiab tus pin nkag los kho qhov hluav taws xob tso tawm. Cov ntaub ntawv ntawm cov cuab yeej no tuaj yeem pom hauv is taws nem. Kuv nyob ntawm cov resistors uas yog lub luag haujlwm los teeb qhov hluav taws xob. Lawv muaj npe R10 thiab R14 ntawm pcb. Kuv coj qhov tseem ceeb ntawm lawv thiab muab tso rau hauv cov lej suav uas tau sau rau hauv cov ntawv xov xwm. Vo = Vref*(1+R10/R14). Siv R10 = 5.1kOhm thiab R14 = 4.7kOhm Cov txiaj ntsig tau raws nraim 5.2V raws li nws tau sau rau ntawm lub hwj chim.
Kauj Ruam 2: Xeem Qhov Chaw Tshiab thiab Hloov Kho Cov Ntaus
Kuv xav khaws qhov sib npaug ntawm R10 thiab R14 txog qhov zoo ib yam li nws tau nyob hauv thawj kab ntawv. Qhov ntawd yog puag ncig 10kOhm. Txhawm rau kom tau txais txiaj ntsig txiaj ntsig siab dua Kuv yuav tsum tau hloov kho cov resistors raws li cov ntaub ntawv. Kuv kuj xav tau los hloov qhov tiv thaiv zener diode.
Txog kev tiv thaiv zener Kuv xaiv hom 10V vim tias kuv pom nws hauv kuv cov khoom sau. Qhov hluav taws xob no tiv thaiv cov zis hluav taws xob. Xam tus nqi tiv thaiv tshiab kuv pib nrog R10 siv cov qauv ntawm TL431 cov ntaub ntawv thiab khaws 10kOhm hauv siab. Qhov ntsuas qhov ntsuas yuav yog 6.5kOhm. Qhov ntawd tsis yog tus nqi tiv thaiv uas ib txwm muaj. Kuv xaiv tus nqi ze ntawm 6.8kOhm. Tam sim no kuv suav tus nqi R14 siv tus nqi xaiv rau R10. Kev suav ua rau tus nqi ntawm 3.777kOhm rau R14. Kuv xaiv tus nqi ntawm 3.3kOhm thiab ntxiv 500Ohm trimmer potentiometer. Vim tias kev ua siab ntev ntawm cov kab hluav taws xob nws zoo li yog lub tswv yim zoo los ntxig lub tshuab txiav kom kho qhov hluav taws xob tso tawm. Tom qab tshem cov khoom qub los ntawm sab laug ntawm lub pcb Kuv ntxiv qhov tshiab ntawm cov khoom sab vim kuv tsis siv smd qhov chaw.
Kauj Ruam 3: Cov txiaj ntsig
Qhov ntsuas hluav taws xob qhia tau tseeb 7V (ok.. nws yog 7.02V). Nov yog qhov kuv xav tau:-)
Tam sim no kuv tuaj yeem siv lub zog xa khoom rau kuv qhov kab mob beetle bot … yuav los sai sai no …
Pom zoo:
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