Iko kuumbwa kweiyo Pcb bhodhi

Irizvino redunhu bhodhi rinonyanya kuve nezvinotevera:

Denderedzwa uye pateni (Pattern): Dunhu rinoshandiswa sechombo chekuitisa pakati pekutanga. Muchigadziro, nzvimbo yakakura yemhangura ichave yakawedzerwa kugadzirwa seyakadzika uye simba. Nzira uye kudhirowa zvinogadzirwa panguva imwe chete.

Dielectric layer (Dielectric): Inoshandiswa kuchengetedza iyo yekuvharisa pakati pedunhu uye yega yega, inowanzozivikanwa se substrate.

Gomba (Kuburikidza negomba / via): Iyo kuburikidza neburi inogona kuita kuti mitsetse yemazinga anopfuura maviri ibatane kune imwe neimwe, yakakura kuburikidza negomba inoshandiswa sechikamu plug-in, uye iyo isiri-kuburikidza negomba (nPTH) inowanzo shandiswa. segomo repamusoro Inoshandiswa pakugadzirisa screws panguva yegungano.

Solder resistant / Solder Mask: Haisi yese nzvimbo dzemhangura dzinofanirwa kuve tin-pazvikamu, saka iyo isiri-tin nzvimbo ichadhindwa nedhiri rezvinhu zvinodzivirira mhangura kubva pakudya-tin (kazhinji epoxy resin), dzivisa Short circuits. pakati pemasekete asina-tinned. Zvinoenderana nemaitiro akasiyana, yakakamurwa kuita girinhi mafuta, tsvuku mafuta uye bhuruu mafuta.

Silk screen (Legend / Marking / Silk screen): Ichi chimiro chisina kukosha. Basa guru nderekumaka zita uye chinzvimbo chechikamu chega chega pabhodhi redunhu, iyo iri nyore kugadzirisa uye kuzivikanwa mushure megungano.

Surface Finish: Nekuti iyo mhangura yemhangura iri nyore oxidized munzvimbo yakajairika, haigone kusungirirwa (yakashata solderability), saka inozochengetedzwa pamusoro pemhangura inoda kuiswa tini. Nzira dzekudzivirira dzinosanganisira HASL, ENIG, Immersion Silver, Immersion Tin, uye Organic Solder Preservative (OSP). Imwe neimwe nzira ine zvayakanakira nezvayakaipira, izvo zvakabatanidzwa zvinonzi sepamusoro kurapwa.

Mabhenefiti makuru einjiniya, yekutanga PCB yekuongorora software, tinya kuti uiwane mahara

PCB board maitiro anogona kuve akakwira density. Kwemakumi emakore, kuwanda kwepamusoro kwemapuranga akadhindwa kwakakwanisa kuvandudza pamwe nekuvandudzwa kwekubatanidzwa kwedunhu rekubatanidza uye kufambira mberi kwekukwira tekinoroji.

Kuvimbika kwepamusoro. Kuburikidza nenhevedzano yekuongorora, bvunzo uye kuchembera bvunzo, iyo PCB inogona kushanda yakavimbika kwenguva yakareba (kazhinji makore makumi maviri). Inogona kugadzirwa. Kune akasiyana siyana ekuita zvinodiwa nePCB (yemagetsi, yemuviri, makemikari, mechanika, nezvimwewo), yakadhindwa bhodhi dhizaini inogona kuitika kuburikidza nedhizaini yekumisikidza, kumira, nezvimwe, nenguva pfupi uye nekubudirira kwakanyanya.

Producibility. Ne manejimendi azvino, akamisikidzwa, akayerwa (huwandu), otomatiki uye kumwe kugadzirwa kunogona kuitwa kuve nechokwadi chemhando yechigadzirwa.

Testability. Nzira yakakwana yekuyedza, chiyero chekuyedza, midziyo yakasiyana-siyana yekuyedza uye zviridzwa zvakavambwa kuti zvione uye uone kukodzera uye hupenyu hwesevhisi yezvigadzirwa zvePCB. Inogona kuunganidzwa. Zvigadzirwa zvePCB hazvisi nyore chete kuungana kwakamisikidzwa kwezvinhu zvakasiyana-siyana, asiwo kune otomatiki uye hukuru-hukuru kugadzirwa kwehuwandu. Panguva imwecheteyo, PCB uye zvikamu zvakasiyana-siyana zvegungano zvinogona kuunganidzwa kuti zvigadzire zvikamu zvakakura uye zvirongwa, kusvika kumuchina wakakwana.maintainability. Sezvo zvigadzirwa zvePCB uye zvikamu zvakasiyana-siyana zvegungano zvakagadzirwa uye zvinogadzirwa pamwero mukuru, zvikamu izvi zvakamisikidzwa zvakare. Naizvozvo, kana iyo system yakundikana, inogona kutsiviwa nekukurumidza, zviri nyore uye nyore, uye iyo system inogona kukurumidza kudzoserwa kushanda. Chokwadi, panogona kuva nemimwe mienzaniso. Zvakadai se miniaturization uye kuderedzwa kwehuremu kweiyo system, uye yakakwirira-kumhanya chiratidzo chekufambisa.

Ndeupi musiyano uripo pakati pePCB board uye yakabatanidzwa dunhu?

Integrated Circuit Features

Maseketi akabatanidzwa ane zvakanakira saizi diki, huremu huremu, waya shoma dzekutungamira uye mapoinzi ekusodha, hupenyu hurefu, kuvimbika kwepamusoro, uye kuita kwakanaka. Panguva imwecheteyo, vane mutengo wakaderera uye wakanakira kugadzirwa kwakawanda. Haisi kungoshandiswa zvakanyanya muzvigadzirwa zvemagetsi zvemaindasitiri uye zvechivanhu zvakaita sematepi rekodha, terevhizheni, makomputa, nezvimwe, asiwo mumauto, kutaurirana, uye kure kure. Uchishandisa maseketi akabatanidzwa kuunganidza midziyo yemagetsi, kuwanda kwegungano kunogona kuwedzerwa makumi akati wandei kusvika kuzviuru zvenguva pane ye transistors, uye yakagadzikana yekushanda nguva yemidziyo inogona zvakare kuvandudzwa zvakanyanya.

Integrated Circuit Application Mienzaniso

Yakabatanidzwa yedunhu IC1 ndeye 555 nguva yedunhu, iyo yakabatana semonostable dunhu pano. Kazhinji, nekuti hapana induced voltage paP terminal ye touch pad, iyo capacitor C1 inoburitswa kuburikidza ne7th pini ye555, kubuda kwe3 pini kwakadzikira, relay KS inoburitswa, uye mwenje haaiti. vhenekera.

Paunenge uchida kubatidza mwenje, bata chidimbu chesimbi P neruoko rwako, uye clutter signal voltage inokonzerwa nemuviri wemunhu inowedzerwa kubva kuC2 kusvika kune trigger terminal ye555, kuitira kuti kubuda kwe555 kushanduka kubva pasi kusvika kumusoro. . Iyo relay KS inokwevera mukati uye mwenje unobatidzwa. Bright. Panguva imwecheteyo, pini yechinomwe ye7 yakagurwa mukati, uye magetsi ekupa magetsi C555 kuburikidza neR1, iyo inotanga nguva.

Kana iyo voltage pa capacitor C1 ichikwira kusvika 2/3 yemagetsi emagetsi emagetsi, pini yechinomwe ye7 inovhurwa kuti ibudise C555, kuitira kuti kubuda kwepini ye1 kuchinje kubva padanho repamusoro kuenda padanho rakaderera, relay inoburitswa. , chiedza chinodzima, uye nguva inoguma.

Kureba kwenguva kunotsanangurwa neR1 uye C1: T1 = 1.1R1 * C1. Maererano nekukosha kwakaratidzwa mumufananidzo, nguva yenguva inenge maminitsi mana. D4 inogona kusarudza 1N1 kana 4148N1.

Ndeupi musiyano uripo pakati pePCB board uye yakabatanidzwa dunhu?

Mudunhu reiyo nhamba, iyo nguva base dunhu 555 yakabatana seyakagadzika dunhu, uye inobuda frequency yepini 3 ndeye 20KHz, uye basa reshiyo i1: 1 square wave. Kana pini 3 yakakwirira, C4 inobhadharwa; kana yakaderera, C3 inobhadharwa. Nekuda kwekuvapo kweVD1 neVD2, C3 neC4 zvinongobhadhariswa asi hazvina kuburitswa mudunhu, uye iyo yakanyanya kuchaja kukosha ndeye EC. Unganidza B terminal kusvika pasi, uye +/-EC mbiri mbiri yemagetsi inowanikwa kumativi ose eA uye C. Ikozvino inobuda yedunhu iri inodarika 50mA.

Ndeupi musiyano uripo pakati pePCB board uye yakabatanidzwa dunhu?

Musiyano uripo pakati pePCB board uye integrated circuit. Yakabatanidzwa sedunhu kazhinji inoreva kubatanidzwa kwemachipisi, senge Northbridge chip pabhodhi reamai, mukati meCPU inodaidzwa kunzi Integrated circuit, uye zita rekutanga rinonziwo Integrated block. Uye dunhu rakadhindwa rinoreva bhodhi redunhu ratinowanzoona, pamwe nekudhinda solder machipisi pabhodhi redunhu.

Integrated circuit (IC) inotengeswa paPCB board; iyo PCB board ndiyo inotakura yedunhu rakasanganiswa (IC). Iyo PCB bhodhi ibhodhi redunhu rakadhindwa (PCB). Mapuranga edunhu akadhindwa anoonekwa munenge mumidziyo yese yemagetsi. Kana paine zvikamu zvemagetsi mune chimwe chishandiso, mabhodhi edunhu akadhindwa ese akaiswa paPCB dzehukuru hwakasiyana. Mukuwedzera pakugadzirisa zvikamu zviduku zvakasiyana-siyana, basa guru rebhodhi rakadhindwa nderekubatanidza nemagetsi zvikamu zvepamusoro kune mumwe nemumwe.

Zvichitaurwa zviri nyore, dunhu rakabatanidzwa rinobatanidza general-chinangwa chedunhu mune chip. Zvakakwana. Kana ichinge yakuvadzwa mukati, iyo chip inokuvadzwa zvakare, uye iyo PCB inogona solder zvikamu zvega, uye kutsiva zvikamu kana ikaputswa.