Wamkelekile kwisikhokelo sethu esibanzi sokuhlola iibhodi zeesekethe eziprintiweyo (PCBs) nge-multimeter. Nokuba ungumntu othanda izinto zokuzonwabisa, othanda izinto zombane, okanye ubuchwephesha, ukwazi ukusebenzisa ngokufanelekileyo i-multimeter ukuvavanya ii-PCBs kubalulekile ekuxazululeni iingxaki kunye nokuqinisekisa ukuthembeka kweeprojekthi zakho zombane. Kule bhlog, siza kuchaza inkqubo yenyathelo ngenyathelo yokuhlolwa okucokisekileyo kwePCB usebenzisa i-multimeter, sikunika ulwazi lokukhomba impazamo kwaye wenze ulungiso oluyimfuneko.
Funda ngeePCBs kunye namacandelo azo:
Ngaphambi kokuntywila kwinkqubo, kubalulekile ukuba ube nokuqonda okusisiseko kwePCB kunye namalungu ayo. I-PCB lishiti elisicaba lezinto ezingaqhubekiyo (ngokuqhelekileyo i-fiberglass) ebonelela ngenkxaso yomatshini kunye noqhagamshelo lombane kumacandelo awohlukeneyo e-elektroniki. Ezi zixhobo, ezifana ne-resistors, i-capacitors, i-diodes, kunye neesekethe ezihlanganisiweyo, zifakwe kwi-PCB zisebenzisa iindlela zokuqhuba ezibizwa ngokuba yi-traces.
Inyathelo 1: Qinisekisa ukuba i-multimeter imiselwe ngokuchanekileyo:
Ukuqalisa ukuhlolwa kwe-PCB, seta i-multimeter kuseto olufanelekileyo. Yitshintshele kwimodi ethi "Ohms" okanye "Ukuchasana", njengoko oku kuya kusivumela ukuba silinganise ukuqhubeka kunye nokuchasana ebhodini. Kwakhona, lungisa uluhlu lokuseta ngokwemilinganiselo elindelekileyo yokuchasa oya kudibana nayo kwiPCB.
Inyathelo 2: Jonga ukuQhuba:
Uvavanyo oluqhubekayo lunceda ekuchongeni intembeko yokulandelela kunye neendawo ezithengiswayo kwi-PCB. Qala ucime amandla kwiPCB. Emva koko, bamba i-multimeter's black and red probes ukuya kwiindawo ezimbini ezahlukeneyo kumkhondo okanye kwi-solder joint. Ukuba i-multimeter ibetha okanye ibonisa ukuchasana kwe-zero, ibonisa ukuqhubeka, ebonisa umkhondo omhle okanye uxhulumaniso. Ukuba akukho beep okanye ukufundwa kokumelana okuphezulu, kukho isiphaluka esivulekileyo okanye uxhulumaniso olubi olufuna ukulungiswa.
Inyathelo 3: Chonga isekethe emfutshane:
Iisekethe ezimfutshane zihlala zingunobangela wokusilela kwePCB. Ukuzichonga, seta i-multimeter yakho kwimodi ye "diode". Chukumisa iprobe emnyama emhlabeni, emva koko uchukumise kancinci iprobe ebomvu ukuya kwiindawo ezahlukeneyo kwi-PCB, ngakumbi kufutshane nee-ICs kunye nezinto ezivelisa ubushushu. Ukuba i-multimeter ifundeka phantsi okanye i-beeps, ibonisa isiphaluka esifutshane esifuna ukuhlolwa nokulungiswa ngakumbi.
Inyathelo lesi-4: Linganisa ukuxhathisa:
Uvavanyo lokuxhathisa lunceda ukumisela imfezeko yabaxhathisi kwi-PCB. Khetha uluhlu olufanelekileyo kwi-multimeter yokulinganisa ukuchasana kwaye uthinte incam yeprobe kuzo zombini iziphelo ze-resistor. I-resistor enempilo kufuneka inikeze ukuchasana ngaphakathi kokunyamezela okuboniswa yikhowudi yombala wayo. Ukuba ufundo lucime kakhulu, i-resistor inokufuna ukutshintshwa.
Inyathelo 5: IiCapacitors zoVavanyo:
I-Capacitors ngamacandelo abalulekileyo ahlala ethanda ukusilela. Ukuqinisekisa ukusebenza kwayo, setha i-multimeter kwimodi ye "capacitance". Ukuchonga ii-terminals ezintle kunye nezibi ze-capacitor kwaye ubeke i-multimeter probes ngokufanelekileyo. I-multimeter iya kubonisa ixabiso le-capacitance, ongayithelekisa kunye ne-capacitance ephawulwe kwicandelo. Amaxabiso ahlukeneyo ahlukeneyo anokubonisa i-capacitor engalunganga.
Ngokulandela la manyathelo angasentla, ungasebenzisa ngokufanelekileyo i-multimeter ukujonga kunye nokuxilonga iingxaki kwi-PCB. Khumbula ukuba umonde kunye nokugxila kubalulekile ngeli xesha lokuqinisekisa iziphumo ezichanekileyo kwaye ugweme umonakalo ongakumbi. Ngokuchonga iziphene ngokuchanekileyo, unokuqalisa ukulungisa ngokuzithemba, uququzelele iiprojekthi eziyimpumelelo ze-elektroniki kunye nokuphucula izakhono zakho zokusombulula ingxaki. Uvavanyo olonwabileyo kunye nokulungiswa!
Ixesha lokuposa: Jul-31-2023