Kuhihewa 1: Mālama i ke kumu kūʻai

Kuhihewa maʻamau 1: He aha ke kala e koho ai ke kukui hōʻailona ma ka panel? Makemake au i ka uliuli, no laila e koho.

ʻO ka hopena maikaʻi: No nā kukui hōʻailona ma ka mākeke, ʻulaʻula, ʻōmaʻomaʻo, melemele, ʻalani, a me nā mea ʻē aʻe, me ka nānā ʻole i ka nui (ma lalo o 5MM) a me ka pāpaʻi, ua oʻo lākou no nā makahiki he nui, no laila ʻoi aku ka liʻiliʻi o ke kumukūʻai ma mua o 50 keneta. Ua hoʻokumu ʻia ke kukui hōʻailona polū i nā makahiki ʻekolu a ʻehā paha. ʻAʻole maikaʻi ke ʻano o ka ʻenehana a me ka paʻa o ka lako, no laila ʻehā a ʻelima paha ke kumukūʻai o ke kumukūʻai. Inā hoʻolālā ʻoe i ka waihoʻoluʻu hōʻailona hōʻailona me nā koi kūikawā, mai koho i ka uliuli. I kēia manawa, hoʻohana ʻia ke kukui polū i nā manawa hiki ʻole ke pani ʻia e nā kala ʻē aʻe, e like me ka hōʻike ʻana i nā hōʻailona wikiō.

Ke kuhi hewa maʻamau 2: ʻAʻole pili kēia mau mea pale i lalo / huki i luna i kā lākou mau waiwai kūʻē. E koho wale i ka huina helu 5K.

ʻO ka hopena maikaʻi: ʻOiaʻiʻo, ʻaʻohe waiwai kūʻē o 5K i ka mākeke. ʻO ka mea kokoke loa he 4.99K (pololei 1%), a ukali ʻia e 5.1K (pololei 5%). ʻO ke kumu kūʻai he 4 mau manawa kiʻekiʻe ma mua o ka 4.7K me ka 20% pololei. 2 manawa. ʻO ka waiwai kū'ē o 20% precision resistance he 1, 1.5, 2.2, 3.3, 4.7, 6.8 wale nō nāʻano (me nā helu helu helu o 10); e like me ka 20% precision capacitor aia wale nō nā helu capacitance ma luna. No nā mea pale a me nā capacitors, inā koho ʻoe i kahi waiwai ʻē aʻe ma mua o kēia mau ʻano, pono ʻoe e hoʻohana i ka pololei kiʻekiʻe, a pālua ke kumukūʻai. Inā ʻaʻole nui nā koi pololei, he ʻōpala nui kēia. Eia kekahi, he mea nui ka maikaʻi o nā resistors. I kekahi manawa ua lawa ka pūʻulu o nā resistors haʻahaʻa e luku i kahi papahana. Manaʻo ʻia ʻoe e kūʻai iā lākou ma nā hale kūʻai ponoʻī e like me Lichuang Mall.

Kuhi hewa maʻamau 3: Hiki ke hoʻohana ʻia ke kaʻapuni puka 74XX no kēia loiloi, akā ua lepo loa, no laila e hoʻohana i ka CPLD, ʻoi aku ka kiʻekiʻe.

ʻO ka hopena maikaʻi: 74XX kaapuni ʻīpuka he mau keneta wale nō, a ʻo CPLD ka liʻiliʻi he mau kakini kālā (GAL/PAL he mau dala wale nō, akā ʻaʻole ia e ʻōlelo ʻia), ua piʻi pinepine ke kumukūʻai, ʻaʻole e haʻi ʻia, ʻo ia. hoʻi i ka hana, palapala, etc. Hoʻohui i nā manawa he nui i ka hana. Ma lalo o ka manaʻo o ka pili ʻole i ka hana, ʻoi aku ka maikaʻi o ka hoʻohana ʻana i ka 74XX me ka hana kiʻekiʻe.

Kuhi hewa maʻamau 4: ʻAʻole kiʻekiʻe nā koi hoʻolālā PCB o kēia papa, e hoʻohana wale i kahi uea lahilahi a hoʻonohonoho pono iā ia.

ʻO ka hopena maikaʻi: ʻO ka wili aunoa e lawe i kahi PCB nui aʻe, a i ka manawa like e hoʻohua ai i nā manawa he nui aʻe ma mua o ka wili manual. Ma kahi nui o nā huahana, he mea nui ka manaʻo o nā mea hana PCB e pili ana i ka laulā laina a me ka helu o nā vias e pili ana i ke kumu kūʻai. , Hoʻopili lākou i ka hua o ka PCB a me ka helu o nā pahu drill i pau. Eia kekahi, pili ka wahi o ka papa PCB i ke kumukūʻai. No laila, ua hoʻopaʻa ʻia nā wili uila e hoʻonui i ke kumukūʻai hana o ka papa kaapuni.

Ke kuhi hewa maʻamau 5: He kiʻekiʻe loa kā mākou koi ʻōnaehana, me ka MEM, CPU, FPGA a me nā ʻāpana āpau e koho i ka wikiwiki loa.

ʻO ka hopena maikaʻi: ʻAʻole hana nā ʻāpana āpau o kahi ʻōnaehana kiʻekiʻe i ka wikiwiki kiʻekiʻe, a i kēlā me kēia manawa e piʻi ai ka wikiwiki o ka mīkini i hoʻokahi pae, ʻaneʻane pālua ke kumukūʻai, a he hopena maikaʻi ʻole hoʻi i nā pilikia hōʻailona hōʻailona. No laila, i ke koho ʻana i kahi chip, pono e noʻonoʻo i ke ʻano o ka hoʻohana ʻana i nā ʻāpana like ʻole o ka hāmeʻa, ma mua o ka hoʻohana ʻana i ka wikiwiki.

Ke kuhi hewa maʻamau 6: ʻOiai paʻa ka papahana, ʻaʻole koʻikoʻi ka code lōʻihi a me ka hana haʻahaʻa.

ʻO ka hopena maikaʻi: kūʻai ʻia ka wikiwiki CPU a me ka wahi hoʻomanaʻo me ke kālā. Inā ʻoe e hoʻolilo i kekahi mau lā hou e hoʻomaikaʻi i ka pono o ka papahana i ka wā e kākau ai i nā code, a laila kūpono ke kumukūʻai mai ka hōʻemi ʻana i ke alapine CPU a me ka hōʻemi ʻana i ka hiki ke hoʻomanaʻo. Ua like ka hoʻolālā CPLD/FPGA.