Akukho mathandabuzo malunga nokusebenza kweebhodi zesonka ezingenasolder, kodwa kufuneka uvume ukuba azigqibelelanga. Kakade ke, azilungele iintlobo ezithile zeesekethe, kodwa azinangxaki kangako kunezo zine-jumpers. Abantu abangakhathaliyo baya kugqibela bebambeke kwinqwaba yee-jumpers ezineenxalenye zazo, kwaye abantu abakhethayo baya kuchitha ixesha elininzi belungisa ii-jumpers endaweni yokwenza i-prototype yesekethe ngokwayo. Ndingenza ntoni?
Enye indlela yokusombulula le ngxaki kukwenza ibhodi yesonka engenasoda ngaphandle kwee-jumpers. Le yingcinga esekwe kwi-"products" zebhakari eziqhubekayo zika[Kevin Santo Cappuccio]. Ingcinga kukulungisa ibhodi yesonka eqhelekileyo ukuze unxibelelwano phakathi kwayo nayiphi na isibini see-common contact strips kunye ne-power rail lukwazi ukusekwa kwisoftware. Icebo elingasemva koku kukulinganisa i-CMOS switch chip matrix, ingakumbi i-MT8816AP. Ii-crosspoint switches ezili-128 nge-chip nganye zinokuphatha ii-voltage ukuya kuthi ga kwi-±12 volts, ngoko ke kukho iisekethe ezininzi ezinokusebenzisa ezi jumpers ze-silicon ezinokucwangciswa.
[Kevin] Inguqulelo yangoku yi-0.2, ubungakanani bayo bulingana phantsi kwebhodi yesonka engenasoda, kwaye iphakheji incinci. Wabelane ngeenkcukacha zendlela yokudibanisa oonxibelelwano bebhodi yesonka, nto leyo ebonakala ngathi yinkqubo ebuhlungu: khupha oonxibelelwano, usike ilebheli encinci ekupheleni komsele, uze uyigobe ukuze wenze ushicilelo lwe-lead lwebhodi yesekethe enomngxuma odlulayo. Kubonakala ngathi ngumsebenzi omninzi, kufuneka kubekho indlela engcono; [Kevin] ngokucacileyo uvulelekile kwiingcebiso.
Nangona sikhe sabona ukutshintshana kwee-cross-point kusetyenziswa ukuphucula ii-breadboards ezingenazo i-solder ngaphambili, sifumanise ukuba ukulula kwale projekthi kuyathandeka. Ingcinga yokulahla zonke ezi shots zokutsiba ngokuqinisekileyo iyathandeka.
Le yiprojekthi entle ngokwenene. Ukongeza okukrelekrele kukuba kukho izikrini ezincinci kwicala ngalinye ezibonisa unxibelelwano lwangoku.
Ngaphandle kokuba awukwazi ukusebenzisa isibonisi se-LED esineziqendu ezi-7 okanye i-vibration motor okanye i-accelerometer okanye i-DIP switch okanye naziphi na ezinye izinto "ezinomdla nezinomdla".
I-15mA (ImaxIO) yanele ukusingatha nayiphi na isignali encinci, xa ufuna amandla angaphezulu, ungasebenzisa i-bipolar okanye i-FET, emva kwayo yonke loo nto, isesebhodini lokubeka isitya.
Xa ndandisenza iprototyping, ndenze i-PCB yokufaka ubuso obunecala elinye eyayiqulathe zonke iitships zedijithali endandizifuna ndaza ndasasaza iitships zeCPLD ezazithwala imiqondiso "yonke" phakathi kweetships. Emva koko cwangcisa uqhagamshelo kwi-VHDL. Ngoko ke ukuba ndenza impazamo okanye ndifuna ukutshintsha uqhagamshelo, kukutshintsha nje ikhowudi.
Kwenye yezo synthesizer ze-analog apho ufaka zonke iintambo, le ngcinga ibonakala intle kakhulu.
Kaloku, ndakuba ndidibene nebhodi yokubeka ukutya endiyithembileyo, andiyi kuthandabuza. Kwibhodi yokubeka ukutya, *isoloko* ifuna ukuqikelela ukuba ingaba yimpazamo kuyilo lwakho okanye yimpazamo kwibhodi yokubeka ukutya.
Okubi nangakumbi kukuba, kufuneka uyile ngokukodwa ubuchule bebhodi yokubeka isitya, kwaye izinto ezifuna ukwenziwa umzekelo, ezinje ngokutshintsha iiregi, azisebenzi kakuhle.
Ii-analog kunye ne-high-speed azizithandi ii-parasites, i-digital kunye ne-low-speed azifuni i-prototype stage eyenziwe ngesandla, ukuba ulumkile.
Andazi nto ngazo zonke ezi zinto, kodwa bendisoloko ndinethemba lokuguqulwa okunjalo, kwaye ngalo lonke ixesha ndikujonga, ndifumanisa ukuba akunjalo. Kwanakwiisekethi ezilula, kufuneka ulungelelanise ngononophelo iswitshi neemfuno zakho zokwenyani. Emva koko kusafuneka wamkele inqanaba elithile lokuziphatha okungafunekiyo. Zisoloko ziyi-true unity gain op amps okanye uhlobo oluthile lwee-transistors ezine-voltage bias okanye resistance.
Andazi okuninzi malunga netekhnoloji esisiseko. Iphepha ledatha le-MT8816 endilifumeneyo alinawo umzobo wesicwangciso sonxibelelwano lokwenyani. Kodwa ngoko nangoko (ukuba ndiyicacisile ngokuchanekileyo), ndibone ukuba umbane ophezulu yi-15mA kwaye ukumelana okuqhelekileyo yi-45ohm kwi-Vdd=12. Kakade licandelo elinomdla elinokusetyenziswa kwizinto ezininzi, kodwa isilumkiso sikhulu. Lawula nokuba. Andinakucinga ngesekethe enye endiyenzileyo ngebhodi yesonka enokulungiswa. Ingakumbi kuba ndisebenzise ibhodi yesonka njengenyathelo ngaphambi kokudibanisa ibhodi yesonka kunye... Xa kuthelekiswa nale switch, indlela eyahlukileyo kakhulu yokuziphatha kweengcingo yenze kwaba nzima ukuqala konke konke.
Ukuba ndiyaqonda indlela esebenza ngayo le sekethe ngokwaneleyo ukuqikelela impembelelo yolu qhagamshelo kuyo, ngoko andidingi bhodi yokubeka isiseko kwasekuqaleni.
Kwiimpawu ezincinci ezigcina umbane ophantsi, oku kufanele kube ngathi yiswitshi efanelekileyo. Kakade ke, ukumelana nombane kuya kwahluka ngokuxhomekeke kwindawo yakho ngqo ngaphakathi koluhlu lwevolthi, kodwa kuya kufuneka ujongane neekhiloohms nangona kunjalo, kwaye akufanele kuthathe cala ukuba wongeza i-+-75 ohm kule mpazamo kuyilo lwakho. Ngaphandle koko, uyila isekethe engenakwakhiwa ngenxa yokunyamezelana kwamacandelo.
Ewe, wakuba unesixhobo, ungaphuma uye kuyila iprojekthi, le projekthi yonke iyisiginali encinci engabalulekanga eyi +/-75ohm. Kodwa andikaze ndenze iprojekthi enjalo. Andikwazi nokucinga ngeprojekthi enobukhulu obungaka. Amanani acocekileyo phantse yinto ekuphela kwayo ehlangabezana neemfuno, ngenxa yoku unokuba nonxibelelwano oluninzi kangangokuba ibhodi yesonka iyinto nje encinci, okanye kukho unxibelelwano oluncinci kangangokuba ungathanda ukusebenzisa i-ic clip ukutsiba intambo.
Enyanisweni, isiqingatha sekhowudi egqityiweyo apho sinokubeka i-frequency ethile (okanye nayiphi na isignali) kwi-probe ukuze ukwazi ukuyixhuma kwimigca eyahlukeneyo uze uxelele ibhodi ukuba loluphi uqhagamshelo ofuna ukulwenza ngaphandle kwekhompyutha.
Inyathelo elilandelayo emva kokuba ndifumene izinto ezisisiseko zisebenza kakuhle kukwenza ezinye zezinto ozikhankanyileyo. Kukho iindlela ezininzi zokusombulula le ngxaki. Ndicinga ukuba eyona ndlela inobuchule kukufaka isibonisi phezulu kwebhodi yentsimbi, kodwa ukwenza isibonisi esinezimbobo ezinjalo kunokufuna inqanaba lophuhliso lweSamsung. Enye indlela kukufaka iprojektha encinci kunye nekhamera kuyo, kodwa zonke izinto endizisebenzisileyo ezizama ukwenza izinto ezinjalo zicotha kakhulu kwaye zinengxaki ukuzisebenzisa, kwaye kukho nje inkunkuma evuthayo.
Asikuko ukuba akukho nanye kwezi zinto inokwenziwa, kufuneka nje ndifumane indlela yokwenza oku ngaphandle kokuncama amava.
Ndiyayithanda ingcamango yeeprobes. Njengomqondiso, ikholamu nganye ine-rgb, kwaye "inethi" nganye inekhowudi yayo yombala. Ngokuqinisekileyo ayilumkanga njengeeprojektha eziphezu kwentloko, kodwa kulula ukuqhuba ii-ws281* strips.
Nangona kumava am, ezo plate zeplastiki ezingabonakaliyo, ezingenalo uphawu, azinamsebenzi, kodwa kuvakala kulula ukudibanisa i-case ecacileyo ne-bb830 clip kune-display enomngxuma. Vula ezinye iindlela zokubeka ii-LED. Kodwa nokubeka ii-LED ngaphezulu nangaphantsi kwebhodi yesekethe akuyonto imbi (ngaphandle kokuba i-power rail iphazamisa kancinci)
Ndiyayithanda le ngcinga, kwaye kufuneka ndiyifunde ngononophelo itshiphusi. Bendisoloko ndikhangela into efanayo-kodwa ngamanani kuphela. Iphini nganye kufuneka ibe nokumelana okucwangcisiweyo kunye nokumelana okucwangcisiweyo kwiseti yomhlaba njengeseti yokufaka njengeseti yokuphuma ukuze ichaze zonke njengebhloko yerejista yokutshintsha kwiphini nganye, ngoko ke isoftware inokucwangciswa. Kodwa kude kube ngoku akukho FPGA/CPLD efanelekileyo efunyenweyo. Kwibhodi yesonka, inkqubo kufuneka igubungele ubuncinci iiphini ezingama-60 ezingama-30+30. Ekubeni yonke isekelwe kwiirejista zokutshintsha, inokwandiswa ngokulula. Kwaye zonke zilawulwa yisoftware.
Ngokusebenzisa iwebhusayithi kunye neenkonzo zethu, uyavuma ngokucacileyo ukuba iikuki zethu zokusebenza, ukusebenza kunye neentengiso zibekwe. Funda ngakumbi
Ixesha lokuthumela: Novemba-19-2021