Lub Hwj Huam Kho Kom Haum Xeeb: 7 Kauj Ruam (nrog Duab)

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:28

CEEB TOOM: Txoj haujlwm no suav nrog qhov hluav taws xob siab, yog li koj yuav tsum tau ceev faj

Kuv tau hloov pauv lub hwj chim los siv hauv tsev. Nws tuaj yeem muab 17V txog 3A. Koj tuaj yeem ua koj tus kheej lub hwj chim los ntawm ua raws cov kauj ruam, siv hauv tsev.

Kauj Ruam 1: Daim duab Circuit Court

• Firstly inputs txuas rau lub transformer. Kuv siv kwv yees li 65W hloov pauv. Yog tias peb suav qhov yooj yim (Lub zog = Tam sim no*Voltage) peb tuaj yeem kwv yees pes tsawg watts peb xav tau.
• Tom qab ntawd kuv tsim tus choj rectifier nrog diodes. Txoj kev no peb tuaj yeem tau txais ncaj qha tam sim no.
• Cov kauj ruam tom ntej yog kev lim dej. Kuv siv 3300 uf capacitor rau lim dej. Yog koj siv 2*2200 uf (sib npaug) nws tuaj yeem zoo dua.
• Kuv siv lm350 hauv kuv qhov Circuit. LM350 tsim qhov sib txawv 1.25v ntawm cov tswv yim thiab cov zis. Yog li peb yuav tsum suav R1 thiab Rv1 kom kho tau peb cov Vout = 1.25 V (1+Rv1/R1)+Iadj*Rv1. Peb lub zog ntsuas yog P = Tam sim no*(Vin-Vout).
• D5, D6 thiab D7 yog kev tiv thaiv diodes. Lawv tiv thaiv cov capacitors los ntawm kev tso tawm los ntawm cov ntsiab lus qis tam sim no rau hauv tus tswj hwm.
• C1 yog qhov nkag hla hla nws tuaj yeem yog 0.1 F disc lossis 1 F tantalum.
• C7 lim lub suab nrov ntawm lub lauj kaub. Koj yuav tsum tsis txhob xaiv siab dua 20uF.
• Rau LDO cov tswj hwm lawv yuav tsum siv lub zog nruab nrab ntawm ib puag ncig. Nws yog 10ma rau kuv lm350 vim yog vim li no kuv siv 5w pob zeb tiv thaiv. Yog tias koj xaiv 10w nws yuav zoo dua.

Kuv siv qhov thib ob Circuit Court rau dc kiv cua nrog cov zis ntxiv.

Kauj Ruam 2: QHIA QHOV TSEEB

Lub ntsiab PCB

1. Transformer (65 W)
2. Lwv 350
3. 1n5401 diodes*4
4. 3300 uf 50v capacitor
5. 0.1uf zaj duab xis capacitor
6. 1 n4007 diodes *3
7. 2.5k kub
8. 2.2uf electrolytic cap
9. 120r1 wb
10. 22uf electrolytic 50v cap
11. 100uf electrolytic 50v cap
12. 4u7 tantalum 35v cap
13. 150r 5w pob zeb tiv thaiv (koj yuav tsum suav rau koj tus kheej Circuit)
14. Iav fuse (3A-3.3A)

Thib ob pcb

1. coj
2. kiv cua
3. 1 n4007 diodes*f
4. 470 uf 35v electrolitic cap

Kauj Ruam 3: Ua PCB

Tom qab kuv kos lub PCB kuv tau luam tawm ntawm lub tshuab luam ntawv ces kuv luam tawm ntawm cov quav hniav tooj liab. Tom qab ntawd, kuv hloov qee txoj hauv kev. Koj yuav tsum paub tseeb tias txoj hauv kev ntawm PCB tuaj yeem nqa 3A. Tom qab ntawd, kuv muab cov kua qaub.

Kauj Ruam 4: Daim npog ntsej muag (Xaiv tau)

Tom qab kuv yaj cov tooj liab hauv cov kua qaub, kuv tau ua daim npog qhov ncauj ntawm kuv tus PCB. Kev ua daim npog qhov ncauj yog qhov nyuaj me ntsis tab sis nws muaj ntau yam txiaj ntsig. Ua ntej koj tuaj yeem tiv thaiv los ntawm kev xeb thiab koj tuaj yeem tiv thaiv qee qhov xwm txheej luv. Tom qab daim npog qhov ncauj, kuv tho qhov ntawm PCB.

Kauj ruam 5: Soldering

Soldering yog ib qho tseem ceeb tshaj plaws ntawm txoj haujlwm no. Koj yuav tsum tau muab cov khoom sib txuas nrog cov ntaub ntawv hauv cov ntawv teev npe. Hauv kuv lub tswv yim, koj yuav tsum tau muab lub lm350 tso rau thaum kawg. Tom qab siv cov laug koj yuav tsum txheeb xyuas nws tsis muaj qhov luv Circuit Court.

Kauj Ruam 6: Sib dhos

Thaum sib dhos koj lub Circuit Court koj qw tau cov kab hluav taws xob raug. Kuv siv ib qho tseem ceeb thiab iav fuse Kuv txuas lawv ib leeg nyob rau hauv ib txoj hauv kev thiab txuas rau ntawm kev hloov pauv tab sis lawv tsis nyob hauv cov phiaj xwm phiaj xwm. Koj yuav tsum tau ceev faj txog luv Circuit Court txwv tsis pub koj tuaj yeem tshuab koj li PSU.

Kauj ruam 7: Hwj chim On

Yog tias koj ua raws cov lus koj tuaj yeem tsim koj tus kheej PSU los siv koj cov phiaj xwm.