Ukungaqondi 1: Ukongiwa kweendleko
Impazamo eqhelekileyo 1: Nguwuphi umbala ekufuneka isalathisi sikhanyise kwiphaneli ukukhetha? Mna ngokwam ndikhetha iblue, ngoko yikhethe.
Isisombululo esihle: Kuba izibane zesalathisi kwiimarike, ezibomvu, eziluhlaza, eziphuzi, ezi-orenji, njl., kungakhathaliseki ubungakanani (ngaphantsi kwe-5MM) kunye nokupakishwa, sele zikhulile amashumi eminyaka, ngoko ke ixabiso ngokuqhelekileyo lingaphantsi kwe-50 cent. Ukukhanya okuluhlaza okwesibhakabhaka kwaqanjwa kwiminyaka emithathu okanye emine edlulileyo. Ukuvuthwa kwetekhnoloji kunye nozinzo lokubonelela akubi kangako, ngoko ke ixabiso lixabisa kane okanye kahlanu ngaphezulu. Ukuba uyila umbala wesalathisi sendawo yolawulo ngaphandle kweemfuno ezizodwa, musa ukukhetha eluhlaza okwesibhakabhaka. Okwangoku, ukukhanya okuluhlaza okwesibhakabhaka kusetyenziswa kuphela kwiimeko ezingenako ukutshintshwa ngeminye imibala, njengokubonisa iimpawu zevidiyo.
Impazamo eqhelekileyo yesi-2: Ezi zixhasi zokutsalela phantsi/zotsalo azibonakali zibalulekile kumaxabiso azo okuxhathisa. Khetha nje inani elipheleleyo elingu-5K.
Isisombululo esihle: Enyanisweni, akukho xabiso lokumelana ne-5K kwimarike. Olona lusondeleyo luyi-4.99K (ukuchaneka kwe-1%), lulandelwa ngu-5.1K (ukuchaneka kwe-5%). Ixabiso lexabiso liphezulu ngamaxesha e-4 ngaphezu kwe-4.7K kunye ne-20% ngokuchanekileyo. 2 amaxesha. Ixabiso lokumelana ne-20% yokumelana ngokuchanekileyo ine-1 kuphela, i-1.5, i-2.2, i-3.3, i-4.7, i-6.8 iindidi (kubandakanywa i-multiple multiples ye-10); ngokuhambelanayo, i-20% capacitor echanekileyo nayo inamaxabiso angaphezulu angaphezulu. I-resistors kunye ne-capacitors, ukuba ukhetha ixabiso ngaphandle kwezi ntlobo, kufuneka usebenzise ukuchaneka okuphezulu, kwaye iindleko ziphindwe kabini. Ukuba iimfuno zokuchaneka azinkulu, oku kuchithwa kweendleko. Ukongeza, umgangatho we-resistors nawo ubaluleke kakhulu. Ngamanye amaxesha i-batch ye-resistors engaphantsi yanele ukutshabalalisa iprojekthi. Kuyacetyiswa ukuba uzithenge kwiivenkile eziziqhuba ngokwazo ezifana ne-Lichuang Mall.
Impazamo eqhelekileyo ye-3: I-74XX isiphaluka sesango singasetyenziselwa le ngqiqo, kodwa ingcolile kakhulu, ngoko sebenzisa i-CPLD, ibonakala iphezulu kakhulu.
Isisombululo esihle: I-74XX isiphaluka sesango ngamasenti ambalwa kuphela, kwaye i-CPLD incinci yeedola (i-GAL / PAL kuphela iidola ezimbalwa, kodwa ayikhuthazwa), ixabiso liye landa ngamaxesha amaninzi, kungakhankanywa, kunjalo. ibuyiselwe kwimveliso, uxwebhu, njl. Yongeza amaxesha amaninzi umsebenzi. Ngaphantsi kwesiseko sokungachaphazeli ukusebenza, kuyacaca ukuba kufanelekile ngakumbi ukusebenzisa i-74XX kunye nokusebenza kweendleko eziphezulu.
Impazamo eqhelekileyo 4: Iimfuno zoyilo zePCB zale bhodi aziphezulu, sebenzisa nje ucingo oluncinci kwaye ululungiselele ngokuzenzekelayo.
Isisombululo esihle: I-wiring ezenzekelayo ngokuqinisekileyo iya kuthatha indawo enkulu ye-PCB, kwaye kwangaxeshanye iya kuvelisa amaxesha amaninzi nge-vias kune-wiring ye-manual. Kwibhetshi enkulu yeemveliso, abavelisi bePCB banengqwalasela ebalulekileyo ngokobubanzi bomgca kunye nenani le-vias ngokwemiqathango yamaxabiso. , Bachaphazela ngokulandelelana isivuno PCB kunye nenani drill amasuntswana ezisetyenzisiweyo. Ukongeza, indawo yebhodi yePCB ikwachaphazela ixabiso. Ngoko ke, i-wiring ngokuzenzekelayo ibophelelwe ukwandisa iindleko zokuvelisa ibhodi yesiphaluka.
Impazamo eqhelekileyo yesi-5: Iimfuno zenkqubo yethu ziphezulu kakhulu, kubandakanya i-MEM, iCPU, iFPGA kunye nazo zonke iitshiphusi kufuneka zikhethe ezona zikhawulezayo.
Isisombululo esihle: Ayiyiyo yonke inxalenye yenkqubo yesantya esiphezulu esebenza ngesantya esiphezulu, kwaye ngalo lonke ixesha isantya sesixhobo sinyuka kwinqanaba elinye, ixabiso liphantse liphindwe kabini, kwaye libuye libe nefuthe elibi kakhulu kwiingxaki zengqibelelo yomqondiso. Ngoko ke, xa ukhetha i-chip, kuyimfuneko ukuqwalasela iqondo lokusetyenziswa kweendawo ezahlukeneyo zesixhobo, kunokusebenzisa ngokukhawuleza.
Impazamo eqhelekileyo ye-6: Ngethuba nje inkqubo izinzile, ikhowudi ende kunye nokusebenza okuphantsi akubalulekanga.
Isisombululo esihle: Isantya seCPU kunye nendawo yememori zombini zithengwa ngemali. Ukuba uchitha iintsuku ezimbalwa zokuphucula ukusebenza kakuhle kwenkqubo xa ubhala ikhowudi, ke iindleko zokonga ekunciphiseni i-CPU rhoqo kunye nokunciphisa umthamo wememori ngokuqinisekileyo kufanelekile. Uyilo lwe-CPLD/FPGA luyafana.