Hapana mubvunzo nezvekushanda kwemabhodhi echingwa asina solder akavimbika, asi unofanira kubvuma kuti haana kukwana. Ehe, haana kunaka kune mamwe marudzi emaseketi, asi haana matambudziko akawanda pane ane majumper. Vanhu vasina hanya vanozopedzisira vabatwa zvisina tariro mumurwi wemajumper ane zvikamu zvawo, uye vanhu vanosarudza vachapedza nguva yakawanda vachiita kuti majumper acho arongeke pane kugadzira muenzaniso weseketi pachayo. Ndinofanira kuitei?
Imwe nzira yekugadzirisa dambudziko iri ndeyekugadzira bhodhi rechingwa risina solder risina majumper. Iyi ndiyo pfungwa iri shure kwe "zvigadzirwa zvebhekari" zva[Kevin Santo Cappuccio] zviri kuenderera mberi. Pfungwa ndeyekugadzirisa bhodhi rechingwa rakajairika kuitira kuti kubatana pakati pemabhurugwa maviri ekubatana nemagetsi kugone kusimbiswa musoftware. Chinhu chakakosha ndechekutevedzera matrix yeCMOS switch chip, kunyanya MT8816AP. Maswitch 128 ecrosspoint pachip imwe neimwe anogona kubata mavolts anosvika ±12 volts, saka kune macircuit akawanda anogona kushandisa aya majumper esilicon anogona kurongwa.
[Kevin] Shanduro yazvino i0.2, saizi yayo inokwana pasi pebhodhi rechingwa risina solder, uye pasuru yacho idiki. Akagovana ruzivo rwekuti ungabatanidza sei macontacts ebhodhi rechingwa, izvo zvaiita senzira inorwadza: bvisa macontacts, cheka label diki pamucheto wegutter, wobva waikotamisa kuti iite lead printing yebhodhi reCircuit rine gomba rakapinda. Zvinoita sebasa rakawanda, panofanira kunge paine nzira iri nani; [Kevin] zviri pachena kuti anogamuchira mazano.
Kunyangwe takamboona kuchinjana kwe cross-point kuchishandiswa kuvandudza mabhodhi ekugadzira asina solder, takaona kuti nyore kwepurojekiti iyi kunofadza. Pfungwa yekurasa ma jump shots aya inokwezva zvechokwadi.
Iri ipurojekiti yakanaka chose. Chimwe chinhu chakanaka ndechekuti kune masikirini madiki kumativi ese anoratidza kubatana kuripo.
Kunze kwekunge usingakwanise kushandisa chiratidziro che LED chine zvikamu zvinomwe kana mota yekudzungudza kana accelerometer kana switch yeDIP kana chero chimwe chinhu "chinonakidza uye chinonakidza".
15mA (ImaxIO) yakakwana kubata chero chiratidzo chidiki, kana uchida magetsi akawanda, unogona kushandisa bipolar kana FET, mushure mezvose, ichiri breadboard.
Pandaiva ndichigadzira prototyping, ndakagadzira PCB ine sided surface mount yaive nema digital chips ese andaida ndikasasa maCPLD chips aitakura ma "signals" ese pakati pemachips. Wobva waisa connection muVHDL. Saka kana ndikakanganisa kana kuda kugadzirisa connection, ingori kodhi yekuchinja.
Kune imwe yeanalog synthesizers dzaunobatanidzira tambo dzese, pfungwa iyi inoita kunge yakanaka.
Kana ndangosangana nebhodhi rekugadzira randinovimba naro, ndicharega kusava nechokwadi. Kune mabhodhi ekugadzira, *nguva dzose* zvinoda kufungidzira kana chiri chikanganiso mudhizaini yako kana kuti chiri chikanganiso mubhodhi rekugadzira randinovimba naro.
Kuti zvinhu zvinyanye kuipa, unofanirwa kugadzira zvakanangana nehunyanzvi hwekugadzira bhodhi rekugadzira, uye zvinhu zvinoda kuratidzwa, zvakaita sekuchinja maregi, hazvishande zvakanaka.
Analog nehigh-speed hazvidi parasitic, digital nelow-speed hazvidi prototype stage yakagadzirwa nemaoko, kana ukangwarira.
Handizivi chinhu nezvezvinhu izvi zvese, asi ndagara ndichitarisira shanduko yakadaro, uye pese pandinozvitarisa, ndinoona kuti hazvisi zvechokwadi. Kunyangwe kumasekete akareruka, unofanirwa kunyatsoenzanisa switch yacho nezvinodiwa zvako chaizvo. Saka uchiri kufanira kugamuchira mwero wakati wehunhu husingadiwe. Nguva dzose ichokwadi unity gain op amps kana imwe mhando ye transistors ine voltage bias kana resistance.
Handizivi zvakawanda nezve tekinoroji iri pasi apa. MT8816 data sheet yandakawana haina schematic diagram yekubatana chaiko. Asi pakarepo (ndichifunga kuti ndatsanangura nemazvo), ndakaona kuti maximum current i15mA uye frequency yakajairika yekudzivirira i45ohm paVdd=12. Ehe chinhu chinonakidza chinogona kushandiswa pazvinhu zvakawanda, asi yambiro yakakura. Kutonga kunyangwe. Handigoni kufunga nezvecircuit imwe chete yandakaita nebreadboard inogona kugadziriswa. Kunyanya nekuti ndakashandisa breadboard sedanho ndisati ndabatanidza breadboard pamwe chete... Zvichienzaniswa neswitch iyi, maitiro akasiyana kwazvo ewaya akaita kuti zvisakwanise kutanga zvachose.
Kana ndikanzwisisa mashandiro anoita dunhu iri zvakanaka kuti ndifanotaura kuti richakanganiswa sei nekubatana uku, saka handidi bhodhi rekugadzira zvinhu pakutanga.
Kune masaini madiki anochengetedza magetsi mashoma, izvi zvinofanira kunge zvakaita seswichi yakakodzera. Ehe, on-resistance inosiyana zvichienderana nenzvimbo yako chaiyo mukati me voltage range, asi uchafanira kugadzirisa ma kiloohms chero zvakadaro, uye hazvifanirwe kukosha kana ukawedzera +-75 ohm kune iyi error mudhizaini yako. Zvikasadaro, uri kugadzira circuit isingagone kuvakwa nekuda kwe component tolerances.
Ehe, kana wangowana mudziyo uyu, unogona kubuda wogadzira purojekiti, purojekiti iyi yese ine chiratidzo chidiki chisina basa che +/-75ohm. Asi handisati ndamboita purojekiti yakadaro. Handitombofungi nezvepurojekiti yakakura kudai. Nhamba dzakachena ndidzo chete dzinosangana nezvinodiwa, pane izvi une ma connections akawanda zvekuti breadboard ingori donhwe mubhaketi, kana kuti kune ma connections mashoma zvekuti ungangoda kushandisa ic clip kusvetuka waya.
Kutaura zvazviri, hafu yekodhi yakazadzwa ipapo inogona kuisa frequency (kana chero chiratidzo) paprobe kuitira kuti ugone kuibatanidza mumitsara yakasiyana woudza bhodhi kuti ndeapi ma connection aunoda kugadzira pasina komputa.
Danho rinotevera mushure mekunge ndawana zvinhu zvekutanga kuti zvishande zvakanaka nderekuita zvimwe zvezvinhu zvawataura. Pane nzira dzakawanda dzekugadzirisa dambudziko iri. Ini ndinofunga kuti nzira yakanakisisa ndeyekuisa display pamusoro pebreadboard, asi kugadzira display ine display ine maburi akadaro kungada kuti Samsung ivandudze. Imwe nzira ndeyekuisa miniature projector nekamera pairi, asi zvinhu zvese zvandakashandisa zvinoedza kuita zvinhu zvakadaro zvinononoka uye zvine matambudziko kushandisa, uye pane gaba remarara rinongobvira.
Hazvirevi kuti hapana chimwe chezvinhu izvi chingaitwe, ndinongoda kutsvaga nzira yekuita izvi ndisingarasi ruzivo.
Ndinoda pfungwa yema probes. Sechiratidzo, koramu yega yega ine rgb, uye "net" yega yega ine kodhi yayo yemavara. Zvechokwadi haina kungwara semaprojekita epamusoro, asi zviri nyore kutyaira ws281* strips.
Kunyangwe mune zvakaitika kwandiri, mapuratifomu epurasitiki asina kujeka asina kujeka haana kunaka, asi zvinonzwika zviri nyore kusanganisa bhokisi rinojeka ne bb830 clip pane kuratidza rine gomba. Vhura dzimwe nzira dzekuisa ma LED. Asi kunyangwe kuisa ma LED pamusoro nepasi pebhodhi redunhu harisi zano rakaipa (kunze kwekuti chiteshi chemagetsi chiri kukanganisa zvishoma)
Ndinofarira pfungwa iyi, uye ndinofanira kudzidza chip nokungwarira. Ndanga ndichitsvaga chimwe chinhu chakafanana - asi muhuwandu chete. Pini yega yega inofanira kuva ne-programmable resistance pamwe ne-programmable resistance kune ground-set se input-set se output-set kuti iite tri-state yese se shift register block yepini yega yega, saka software programmable. Asi kusvika pari zvino hapana FPGA/CPLD yakakodzera yawanikwa. Kune breadboard, system inofanira kufukidza kanenge mapini makumi matanhatu ne30+30. Sezvo zvese zvakavakirwa pamashift registers, zvinogona kuwedzerwa zviri nyore. Uye zvese zvinodzorwa nesoftware.
Nekushandisa webhusaiti yedu nemasevhisi, unobvumirana zvakajeka kuti makuki edu ekushanda, mashandiro uye ekushambadzira aiswe. dzidza zvakawanda
Nguva yekutumira: Mbudzi-19-2021