Kusamvetsetsa 1: Kupulumutsa mtengo

Kulakwitsa kofala 1: Kodi chizindikirocho chiyenera kuyatsa pagawo lotani? Ine ndekha ndimakonda buluu, choncho sankhani.

Yankho labwino: Kwa nyali zowunikira pamsika, zofiira, zobiriwira, zachikasu, lalanje, ndi zina zotere, mosasamala kanthu za kukula (pansi pa 5MM) ndi ma CD, akhala okhwima kwazaka zambiri, kotero mtengo wake nthawi zambiri umakhala wosakwana masenti 50. Kuwala kosonyeza buluu kunapangidwa zaka zitatu kapena zinayi zapitazo. Kukula kwaukadaulo ndi kukhazikika kwazinthu ndizosauka, kotero mtengo wake ndi wokwera kanayi kapena kasanu. Ngati mupanga mtundu wa chizindikiro cha gulu popanda zofunikira zapadera, osasankha buluu. Pakadali pano, kuwala kwa buluu nthawi zambiri kumangogwiritsidwa ntchito nthawi zomwe sizingasinthidwe ndi mitundu ina, monga kuwonetsa makanema.

Kulakwitsa kofala 2: Zotsutsa izi zokokera pansi / kukoka sizikuwoneka kuti zilibe kanthu ndi zomwe amatsutsa. Ingosankha chiwerengero cha 5K.

Yankho labwino: M'malo mwake, palibe mtengo wokana wa 5K pamsika. Yapafupi kwambiri ndi 4.99K (zolondola 1%), zotsatiridwa ndi 5.1K (zolondola 5%). Mtengo wamtengo wapatali ndi 4 nthawi zambiri kuposa 4.7K ndi 20% yolondola. 2 nthawi. Kukaniza kwa 20% kukana kolondola kumakhala ndi mitundu 1, 1.5, 2.2, 3.3, 4.7, 6.8 yokha (kuphatikizapo ma multiples a 10); momwemonso, 20% yolondola capacitor imakhalanso ndi ma capacitance angapo omwe ali pamwambawa. Kwa resistors ndi capacitors, ngati mumasankha mtengo wina kusiyana ndi mitundu iyi, muyenera kugwiritsa ntchito kulondola kwakukulu, ndipo mtengowo umawirikiza kawiri. Ngati zofunikira zolondola sizili zazikulu, izi ndizowononga ndalama zambiri. Kuphatikiza apo, mtundu wa resistors ndiwofunikanso kwambiri. Nthawi zina gulu la otsika resistors ndikwanira kuwononga polojekiti. Ndibwino kuti muwagule m'masitolo odzipangira okha monga Lichuang Mall.

Kulakwitsa kofala 3: Chigawo cha 74XX chitseko chingagwiritsidwe ntchito pamalingaliro awa, koma ndi onyansa kwambiri, choncho gwiritsani ntchito CPLD, ikuwoneka ngati yapamwamba kwambiri.

Njira yabwino yothetsera vutoli: 74XX chipata chozungulira ndi masenti ochepa chabe, ndipo CPLD ndi osachepera madola angapo (GAL / PAL ndi madola ochepa okha, koma osavomerezeka), mtengo wawonjezeka nthawi zambiri, osatchulapo, ndizo. anabwerera kupanga, zolembedwa, etc. Onjezani kangapo ntchito. Pansi pamalingaliro osakhudza magwiridwe antchito, mwachiwonekere ndi koyenera kugwiritsa ntchito 74XX ndi magwiridwe antchito apamwamba.

Kulakwitsa kofala 4: Zofunikira pamapangidwe a PCB pa bolodi ili sizokwera, ingogwiritsani ntchito waya wocheperako ndikuzikonza zokha.

Yankho labwino: Mawaya odziyimira pawokha adzatenga malo okulirapo a PCB, ndipo nthawi yomweyo adzatulutsa maulendo ambiri kuposa mawaya apamanja. Mu gulu lalikulu la mankhwala, opanga PCB ndi mfundo zofunika mu mawu a mzere m'lifupi ndi chiwerengero cha vias mawu a mitengo. , Iwo motero zimakhudza zokolola za PCB ndi chiwerengero cha kubowola zitsulo ankadya. Kuphatikiza apo, gawo la board ya PCB limakhudzanso mtengo. Chifukwa chake, mawaya odziyimira pawokha akuyenera kuonjezera mtengo wopangira gulu lozungulira.

Kulakwitsa kofala 5: Zofunikira zamakina athu ndizokwera kwambiri, kuphatikiza MEM, CPU, FPGA ndi tchipisi tonse tikuyenera kusankha mwachangu kwambiri.

Yankho labwino: Sikuti gawo lililonse la makina othamanga kwambiri limagwira ntchito mothamanga kwambiri, ndipo nthawi iliyonse liwiro la chipangizocho limakwera ndi mulingo umodzi, mtengowo umakhala pafupifupi kawiri, ndipo umakhalanso ndi vuto lalikulu pazovuta za kukhulupirika kwa chizindikiro. Choncho, posankha chip, m'pofunika kuganizira mlingo wa kugwiritsa ntchito mbali zosiyanasiyana za chipangizocho, osati kugwiritsa ntchito mofulumira kwambiri.

Kulakwitsa kofala 6: Malingana ngati pulogalamuyo ili yosasunthika, kachidindo yayitali komanso kuchepa kwachangu sizofunikira.

Yankho labwino: Kuthamanga kwa CPU ndi malo okumbukira zonse zimagulidwa ndi ndalama. Ngati mukhala masiku ochulukirapo kuti muwongolere bwino pulogalamu polemba ma code, ndiye kuti ndalama zochepetsera kuchepetsa kuchuluka kwa CPU ndikuchepetsa kukumbukira ndizofunikadi. Mapangidwe a CPLD/FPGA ndi ofanana.