Tsis muaj ib qho kev tsis ntseeg txog qhov ua tau zoo ntawm cov breadboards uas tsis muaj solder, tab sis koj yuav tsum lees tias lawv tsis zoo tag nrho. Tau kawg, lawv tsis zoo tagnrho rau qee hom circuits, tab sis lawv tsis muaj teeb meem ntau dua li cov uas muaj jumpers. Cov neeg tsis saib xyuas yuav xaus rau hauv ib pawg ntawm cov jumpers nrog lawv cov khoom, thiab cov neeg xaiv yuav siv sijhawm ntau dua los ua cov jumpers kom huv si es tsis txhob ua tus qauv ntawm lub circuit nws tus kheej. Kuv yuav tsum ua li cas?
Ib txoj hauv kev los daws qhov teeb meem no yog ua ib lub breadboard uas tsis muaj solder yam tsis muaj jumpers. Qhov no yog lub tswv yim tom qab [Kevin Santo Cappuccio] txoj kev "khoom ci qhob cij" uas tab tom ua. Lub tswv yim yog kho lub breadboard txheem kom qhov kev sib txuas ntawm txhua tus khub ntawm cov kab sib txuas thiab lub zog hluav taws xob tuaj yeem tsim tau hauv software. Qhov ua kom yuam kev tom qab qhov no yog ua kom pom tseeb CMOS switch chip matrix, tshwj xeeb tshaj yog MT8816AP. 128 crosspoint switches ib lub chip tuaj yeem tswj tau cov voltages txog li ± 12 volts, yog li muaj ntau lub circuits uas tuaj yeem siv cov programmable silicon jumpers no.
[Kevin] Tus qauv tam sim no yog 0.2, nws qhov loj me haum rau hauv qab lub breadboard tsis muaj solder, thiab lub pob khoom me me. Nws tau qhia cov ntsiab lus ntawm yuav ua li cas txuas cov breadboard contacts, uas zoo li yog ib qho txheej txheem mob: rub tawm cov contacts, txiav ib daim ntawv me me ntawm qhov kawg ntawm lub gutter, thiab tom qab ntawd khoov nws kom ua rau cov ntawv luam tawm ntawm lub Circuit Board through hole. Nws zoo li ua haujlwm ntau heev, yuav tsum muaj txoj hauv kev zoo dua; [Kevin] pom tseeb qhib siab rau cov lus qhia.
Txawm hais tias peb tau pom kev hloov pauv hla-taw tes siv los txhim kho cov breadboards tsis muaj solder ua ntej, peb pom qhov yooj yim ntawm qhov project no kom zoo siab. Lub tswv yim ntawm kev pov tseg tag nrho cov kev dhia no yeej yog qhov ntxias.
Qhov no yog ib qhov project zoo kawg li. Ib qho ntxiv uas ntse heev yog tias muaj cov ntxaij vab tshaus me me ntawm txhua sab uas qhia txog kev sib txuas tam sim no.
Tshwj tsis yog tias koj tsis tuaj yeem siv 7-segment LED zaub lossis vibration motor lossis accelerometer lossis DIP switch lossis lwm yam "lom zem thiab nthuav".
15mA (ImaxIO) txaus los tswj txhua lub teeb liab me me, thaum koj xav tau ntau dua tam sim no, koj tuaj yeem siv qee qhov bipolar lossis FET, tom qab tag nrho, nws tseem yog lub breadboard.
Thaum kuv tab tom tsim qauv, kuv tau ua ib lub PCB uas muaj ib sab xwb uas muaj tag nrho cov digital chips uas kuv xav tau thiab muab cov CPLD chips uas nqa "txhua" lub teeb liab ntawm cov chips pov tseg. Tom qab ntawd tsuas yog program qhov kev sib txuas hauv VHDL. Yog li ntawd, yog tias kuv ua yuam kev lossis xav tau hloov kho qhov kev sib txuas, nws tsuas yog kev hloov pauv code xwb.
Rau ib qho ntawm cov analog synthesizers qhov twg koj ntsaws tag nrho cov cables, lub tswv yim no zoo li txias heev.
Zoo, thaum kuv ntsib lub breadboard uas kuv ntseeg siab, kuv yuav tsis ua xyem xyav lawm. Rau cov breadboards, nws *ib txwm* yuav tsum tau kwv yees seb nws puas yog qhov tsis zoo hauv koj tus qauv lossis qhov tsis zoo hauv lub breadboard.
Yuav kom ua rau qhov teeb meem zuj zus tuaj, koj yuav tsum tsim tshwj xeeb rau cov peev xwm ntawm breadboard, thiab cov khoom uas xav tau prototyped, xws li hloov regs, tsis ua haujlwm zoo.
Analog thiab high-speed tsis nyiam parasitics, digital thiab low-speed tsis xav tau theem prototype ua tes, yog tias koj ceev faj.
Kuv tsis paub dab tsi txog txhua yam no, tab sis kuv ib txwm cia siab rau qhov kev hloov pauv zoo li no, thiab txhua zaus kuv saib nws, kuv pom tias nws tsis yog qhov tseeb. Txawm tias rau cov voj voog yooj yim, koj yuav tsum ua tib zoo phim qhov hloov pauv rau koj cov kev xav tau tiag tiag. Tom qab ntawd koj tseem yuav tsum lees txais qee qib ntawm tus cwj pwm tsis zoo. Lawv ib txwm yog qhov tseeb unity gain op amps lossis qee yam transistors nrog voltage bias lossis tsis kam.
Kuv tsis paub ntau txog cov thev naus laus zis hauv qab. Daim ntawv qhia MT8816 uas kuv pom tsis muaj daim duab qhia txog qhov kev sib txuas tiag tiag. Tab sis tam sim ntawd (xav tias kuv piav qhia kom raug), kuv pom tias qhov siab tshaj plaws tam sim no yog 15mA thiab qhov tsis kam rau ntawm Vdd = 12. Nws yog ib qho khoom siv nthuav uas siv tau rau ntau yam, tab sis qhov ceeb toom loj heev. Txawm tias tseem ceeb. Kuv tsis tuaj yeem xav txog ib lub voj voog uas kuv tau ua nrog lub breadboard uas tuaj yeem hloov kho. Tshwj xeeb tshaj yog vim kuv siv lub breadboard ua ib kauj ruam ua ntej soldering lub breadboard ua ke ... Piv rau qhov hloov pauv no, tus cwj pwm sib txawv heev ntawm cov xov hlau ua rau nws tsis tuaj yeem pib txhua.
Yog tias kuv nkag siab txog qhov Circuit Court ua haujlwm zoo txaus los kwv yees qhov cuam tshuam ntawm qhov kev sib txuas no rau nws, ces kuv tsis xav tau lub breadboard thaum xub thawj.
Rau cov teeb liab me me uas tswj tau qhov tam sim no qis, qhov no yuav tsum zoo li qhov hloov pauv zoo tagnrho. Tau kawg, qhov kev tawm tsam yuav txawv nyob ntawm koj qhov chaw nyob hauv qhov ntau ntawm qhov hluav taws xob, tab sis koj yuav tsum tau daws nrog kiloohms txawm li cas los xij, thiab nws yuav tsum tsis muaj teeb meem yog tias koj ntxiv + -75 ohm rau qhov yuam kev no hauv koj tus qauv tsim. Txwv tsis pub, koj tab tom tsim lub voj voog uas tsis tuaj yeem tsim tau vim yog qhov kev kam rau cov khoom.
Yog lawm, thaum koj muaj lub cuab yeej no lawm, koj tuaj yeem tawm mus thiab tsim ib qho project, qhov project no yog +/- 75ohm teeb liab me me tsis muaj feem cuam tshuam. Tab sis kuv yeej tsis tau ua qhov project zoo li no. Kuv tsis tuaj yeem xav txog qhov project loj li no. Cov lej ntshiab yog yuav luag tib yam uas ua tau raws li cov qauv, rau qhov no koj muaj ntau qhov kev sib txuas uas lub breadboard tsuas yog ib qho poob rau hauv lub thoob, lossis muaj ob peb qhov kev sib txuas uas koj xav siv lub ic clip los jumper lub cable.
Qhov tseeb, ib nrab ntawm cov lej ua tiav lawm tuaj yeem tso qee qhov zaus (lossis ib qho teeb liab) rau ntawm qhov probe kom koj tuaj yeem ntsaws nws rau hauv ntau kab sib txawv thiab qhia rau lub rooj tsavxwm seb koj xav ua qhov kev sib txuas twg yam tsis muaj lub khoos phis tawj.
Kauj ruam tom ntej tom qab kuv tau txais cov khoom yooj yim kom ua haujlwm zoo yog ua qee yam uas koj tau hais. Muaj ntau txoj hauv kev los daws qhov teeb meem no. Kuv xav tias txoj hauv kev zoo tshaj plaws yog los teeb tsa lub vijtsam rau saum lub breadboard, tab sis ua lub vijtsam nrog lub vijtsam porous zoo li no yuav xav tau Samsung qib kev txhim kho. Lwm txoj hauv kev yog los teeb tsa lub projector me me thiab lub koob yees duab rau ntawm nws, tab sis txhua yam uas kuv tau siv uas sim ua cov khoom zoo li no qeeb dhau thiab muaj teeb meem siv, thiab tsuas yog muaj lub thoob khib nyiab hluav taws kub ib puag ncig.
Nws tsis yog hais tias ib qho ntawm cov no ua tsis tau, kuv tsuas yog xav nrhiav txoj hauv kev los ua qhov no yam tsis tas yuav txi kev paub dhau los.
Kuv nyiam lub tswv yim ntawm cov probes. Ua ib qho kev qhia, txhua kem muaj rgb, thiab txhua "net" muaj nws tus kheej xim code. Nws yeej tsis ntse npaum li overhead projectors, tab sis nws yooj yim dua rau tsav ws281 * strips.
Txawm hais tias hauv kuv qhov kev paub, cov phaj yas pob tshab uas tsis muaj npe nrov yog cov khib nyiab, tab sis nws zoo li yooj yim dua los ua ke lub thawv pob tshab nrog lub bb830 clip dua li lub vijtsam nrog lub qhov. Qhib ntau txoj kev xaiv tso LED. Tab sis txawm tias tso cov LEDs saum toj thiab hauv qab lub rooj tsavxwm tsis yog lub tswv yim phem (tshwj tsis yog tias lub zog hluav taws xob yog qhov me ntsis hauv txoj kev)
Kuv nyiam lub tswv yim no, thiab yuav tsum kawm cov chip kom zoo zoo. Kuv tau nrhiav ib yam dab tsi zoo sib xws - tab sis tsuas yog hauv cov lej xwb. Txhua tus pin yuav tsum muaj - programmable resistance ntxiv rau - programmable resistance rau hauv av - teeb tsa ua input - teeb tsa ua output - teeb tsa rau tri-state tag nrho ua ib lub shift register block rau txhua tus pin, yog li software programmable. Tab sis txog tam sim no tsis muaj FPGA / CPLD tsim nyog tau pom. Rau lub breadboard, lub kaw lus yuav tsum npog tsawg kawg 60 pins 30 + 30. Vim tias nws yog raws li shift registers, nws tuaj yeem nthuav dav yooj yim. Thiab txhua yam raug tswj hwm los ntawm software.
Thaum koj siv peb lub vas sab thiab cov kev pabcuam, koj pom zoo rau qhov chaw uas peb muab cov ncuav qab zib ua haujlwm tau zoo, ua haujlwm tau zoo thiab tshaj tawm. kawm ntxiv
Lub sijhawm tshaj tawm: Kaum Ib Hlis-19-2021