Kev ua ntawm silk screen hauv PCB tsim yog ib qhov txuas uas yooj yim overlooked los ntawm engineers. Feem ntau, txhua tus neeg tsis tau them nyiaj ntau rau nws thiab ua haujlwm ntawm nws lub siab nyiam, tab sis random ntawm theem no tuaj yeem yooj yim ua rau muaj teeb meem hauv kev teeb tsa thiab kev debugging ntawm pawg thawj coj saib yav tom ntej, lossis txawm tias ua tiav kev puas tsuaj. Tso koj tus qauv tag nrho.

1. Daim ntawv lo ntaus ntawv muab tso rau ntawm lub ncoo los yog ntawm
Nyob rau hauv qhov chaw ntawm tus lej xov tooj R1 hauv daim duab hauv qab no, “1” muab tso rau ntawm lub ncoo ntawm lub cuab yeej. Qhov xwm txheej no tshwm sim heev. Yuav luag txhua tus engineer tau ua qhov yuam kev no thaum pib tsim PCB, vim nws tsis yooj yim pom qhov teeb meem hauv software tsim. Thaum lub rooj tsavxwm tau txais, nws pom tias tus lej feem raug cim los ntawm lub ncoo lossis khoob dhau lawm. Tsis meej pem, tsis muaj peev xwm qhia tau.

2. Daim ntawv lo ntaus ntawv muab tso rau hauv qab pob

Rau U1 hauv daim duab hauv qab no, tej zaum koj lossis cov chaw tsim khoom tsis muaj teeb meem thaum txhim kho lub cuab yeej thawj zaug, tab sis yog tias koj xav tau debug lossis hloov lub cuab yeej, koj yuav nyuaj siab heev thiab nrhiav tsis tau U1 nyob qhov twg. U2 yog qhov tseeb heev thiab yog txoj hauv kev kom raug.

3. Cov khoom siv daim ntawv lo tsis meej meej rau cov khoom siv sib xws

Rau R1 thiab R2 hauv daim duab hauv qab no, yog tias koj tsis txheeb xyuas cov ntaub ntawv tsim PCB, koj tuaj yeem qhia qhov twg yog R1 thiab qhov twg yog R2? Yuav ua li cas rau nruab thiab debug nws? Yog li ntawd, daim ntawv lo ntaus ntawv yuav tsum tau muab tso rau kom tus nyeem ntawv paub txog nws cov attribution ntawm ib nrais muag, thiab tsis muaj ambiguity.

4. Ntaus ntawv cim font me dhau

Vim muaj qhov txwv ntawm qhov chaw ntawm lub rooj tsavxwm thiab cov khoom siv ntom ntom, peb feem ntau yuav tsum siv cov ntawv me me los sau cov khoom siv, tab sis nyob rau hauv txhua rooj plaub, peb yuav tsum xyuas kom meej tias daim ntawv lo yog “nyeem tau”, txwv tsis pub lub ntsiab lus ntawm daim ntawv lo yuav ploj. . Tsis tas li ntawd, cov txheej txheem PCB sib txawv muaj cov txheej txheem sib txawv. Txawm hais tias muaj tib lub font loj, qhov cuam tshuam ntawm cov nroj tsuag sib txawv txawv heev. Qee lub sij hawm, tshwj xeeb tshaj yog thaum ua cov khoom lag luam, txhawm rau kom ntseeg tau cov txiaj ntsig ntawm cov khoom, koj yuav tsum nrhiav kev ua haujlwm raug. High manufacturers rau txheej txheem.

Tib font loj, cov fonts sib txawv muaj cov teebmeem luam ntawv sib txawv. Piv txwv li, lub neej ntawd font ntawm Altium Designer, txawm tias qhov font loj loj, nws nyuaj rau nyeem ntawm PCB board. Yog tias koj hloov mus rau ib qho ntawm “Tswj Hom” fonts, Txawm hais tias qhov loj me me yog ob qhov me me, nws tuaj yeem nyeem tau meej heev.

5. Cov khoom siv uas nyob ib sab muaj cov ntawv cim tsis meej
Saib ob lub resistors hauv daim duab hauv qab no. Lub tsev qiv ntawv pob ntawm cov cuab yeej tsis muaj cov qauv. Nrog rau 4 lub ncoo no, koj tsis tuaj yeem txiav txim siab seb ob lub ncoo twg yog tus resistor, cia nyob ib leeg uas yog R1 thiab qhov twg yog R2. NS. Qhov chaw ntawm cov resistors tuaj yeem yog kab rov tav lossis ntsug. Tsis yog soldering yuav ua rau Circuit Court yuam kev, los yog luv luv Circuit Court, thiab lwm yam yuav tshwm sim loj heev.

6. Kev taw qhia kev tso kawm ntawm daim ntawv lo yog random
Cov kev taw qhia ntawm cov cuab yeej daim ntawv lo rau ntawm PCB yuav tsum nyob rau hauv ib qho kev taw qhia kom ntau li ntau tau, thiab nyob rau hauv feem ntau ob txoj kev. Random kev tso kawm yuav ua rau koj lub installation thiab debugging nyuaj heev, vim hais tias koj yuav tsum tau ua hauj lwm nyuaj kom nrhiav tau cov cuab yeej koj yuav tsum nrhiav. Cov ntawv sau rau ntawm sab laug hauv daim duab hauv qab no tau muab tso kom raug, thiab ib qho ntawm sab xis yog qhov phem heev.

7. Tsis muaj Pin1 tus lej cim ntawm lub cuab yeej IC
IC (Integrated Circuit) cov cuab yeej pob muaj lub cim pib tus pin ze ze Pin 1, xws li “dot” lossis “hnub qub” los xyuas kom meej qhov kev taw qhia raug thaum IC raug teeb tsa. Yog tias nws raug ntsia rov qab, lub cuab yeej yuav raug puas tsuaj thiab lub rooj tsavxwm yuav raug muab pov tseg. Nws yuav tsum raug sau tseg tias lub cim no tsis tuaj yeem muab tso rau hauv IC kom them, txwv tsis pub nws yuav teeb meem heev rau kev debug lub voj voog. Raws li pom hauv daim duab hauv qab no, nws nyuaj rau U1 los txiav txim qhov kev taw qhia rau qhov chaw, thaum U2 yooj yim rau kev txiav txim, vim tias thawj tus pin yog square thiab lwm tus pins yog puag ncig.

8. Tsis muaj qhov cim polarity rau cov khoom siv polarized
Ntau ob txhais ceg, xws li LEDs, electrolytic capacitors, thiab lwm yam, muaj polarity (kev taw qhia). Yog tias lawv tau nruab rau hauv qhov tsis ncaj ncees lawm, lub Circuit Court yuav tsis ua haujlwm lossis txawm tias lub cuab yeej yuav puas. Yog hais tias qhov kev taw qhia ntawm LED tsis yog lawm, nws yuav twv yuav raug hu tsis teeb, thiab cov cuab yeej LED yuav puas vim qhov hluav taws xob tawg, thiab electrolytic capacitor yuav tawg. Yog li ntawd, thaum tsim lub tsev qiv ntawv pob ntawm cov khoom siv no, lub polarity yuav tsum tau muab cim kom meej, thiab lub cim polarity tsis tuaj yeem muab tso rau hauv qab ntawm cov khoom siv, txwv tsis pub lub cim polarity yuav raug thaiv tom qab lub cuab yeej raug teeb tsa, ua rau muaj teeb meem hauv kev debugging. . C1 hauv daim duab hauv qab no tsis yog lawm, vim hais tias ib zaug lub capacitor raug ntsia rau ntawm lub rooj tsavxwm, nws tsis tuaj yeem txiav txim siab seb nws qhov polarity puas yog, thiab txoj hauv kev ntawm C2 yog qhov tseeb.

9. Tsis muaj cua sov tso tawm
Siv cov cua sov tso rau ntawm cov khoom siv pins tuaj yeem ua kom yooj yim dua. Tej zaum koj yuav tsis xav siv thermal relief los txo cov hluav taws xob tiv thaiv thiab thermal tsis kam, tab sis tsis siv thermal nyem tuaj yeem ua rau soldering nyuaj heev, tshwj xeeb tshaj yog thaum cov cuab yeej siv txuas nrog cov kab loj lossis tooj liab. Yog tias tsis siv cov cua sov kom raug, cov kab loj loj thiab cov khoom siv tooj liab zoo li cov dab dej kub yuav ua rau muaj teeb meem hauv cov cua sov. Nyob rau hauv daim duab hauv qab no, lub hauv paus pin ntawm Q1 tsis muaj cua sov tso tawm, thiab MOSFET tej zaum yuav nyuaj rau solder thiab desolder. Lub hauv paus pin ntawm Q2 muaj qhov tso tawm cua sov, thiab MOSFET yooj yim rau solder thiab desolder. Cov neeg tsim qauv PCB tuaj yeem hloov pauv qhov tso tawm cua sov kom tswj tau qhov tsis kam thiab thermal tsis kam ntawm kev sib txuas. Piv txwv li, PCB cov neeg tsim khoom tuaj yeem tso cov cim rau ntawm Q2 qhov chaw tus pin kom nce tus nqi ntawm cov tooj liab txuas rau qhov chaw rau hauv av.