{"id":31332,"date":"2019-10-31T21:40:44","date_gmt":"2019-10-31T18:40:44","guid":{"rendered":"https:\/\/prohoster.info\/blog\/kak-raskrutit-novichka-i-nichego-ne-slomat\/"},"modified":"2019-10-31T21:40:44","modified_gmt":"2019-10-31T18:40:44","slug":"kak-raskrutit-novichka-i-nichego-ne-slomat","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/administrirovanie\/kak-raskrutit-novichka-i-nichego-ne-slomat","title":{"rendered":"Kako promovirati novog zaposlenika bez rizika od gre\u0161aka","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Tra\u017eenje, intervju, testni zadatak, selekcija, zapo\u0161ljavanje, prilagodba \u2014 to je put koji je te\u017eak i jasan svima nama \u2014 i poslodavcima i zaposlenicima.<\/p>\n

Novak nema potrebne specijalizirane kompetencije. \u010cak i iskusnom stru\u010dnjaku treba vremena da se prilagodi. Nadre\u0111enog mu\u010de pitanja o tome koje zadatke postaviti novom zaposleniku na po\u010detku i koliko vremena im posvetiti? Usto, va\u017eno je osigurati zainteresiranost, anga\u017eman, motivaciju i integraciju, ali ne riskirati s kriti\u010dnim poslovnim zadacima.<\/p>\n

\"Kako
\n<\/a><\/noindex>
\nZato pokre\u0107emo unutarnje projekte s estafetskim principom. Oni se sastoje od neovisnih kratkih faza. Rezultati takvog rada slu\u017ee kao temelj za daljnji razvoj i omogu\u0107uju novaku da se poka\u017ee, uklopi u tim kroz zanimljiv zadatak bez rizika da zaklju\u010da va\u017ean projekt. Ovdje se stje\u010de iskustvo, upoznaju kolege i javlja se prilika da se poka\u017ee u najboljem svjetlu bez strogih ograni\u010denja naslije\u0111enih projekata.<\/p>\n

Kao primjer takvog estafetskog razvoja postavljena je tema rotiraju\u0107eg ekrana na temelju stroboskopskog efekta s mogu\u0107no\u0161\u0107u prikazivanja proizvoljne korisni\u010dke dinami\u010dke slike napravljene na ekranu telefona. Prototipove je mogu\u0107e prona\u0107i. ovdje<\/a><\/noindex>.<\/p>\n

Radovi su se provodili postupno od strane nekoliko zaposlenika i bit \u0107e nastavljeni novima tijekom njihove integracije (od dva tjedna do mjeseca, ovisno o sposobnostima i razini kompetencija).<\/p>\n

Faze su bile sljede\u0107e:<\/p>\n

a) razmisliti o dizajnu (istra\u017euju\u0107i dostupne uzorke, opise sli\u010dnih proizvoda, pokazuju\u0107i kreativnu inicijativu);<\/p>\n

b) razviti osnovnu elektri\u010dnu shemu, prikazati je na plo\u010dici;<\/p>\n

c) razviti protokol za prijenos slike s telefona na ure\u0111aj;<\/p>\n

d) osigurati upravljanje sa pametnog telefona putem Bluetooth LE.<\/p>\n

Po\u010detna varijanta je podrazumijevala kori\u0161tenje ne\u010dega vrlo kompaktnog poput trokrakog spinnera, koji bi se ru\u010dnim okretanjem po\u010deo kretati i prikazivati natpise. U jednom kraku nalazio se BLE modul, u drugom \u2013 deset RGB LED dioda, u tre\u0107em opti\u010dki senzor, a u sredi\u0161tu \u2013 akumulator. Izra\u0111ena je shema elektri\u010dne instalacije i provedeni su prvi eksperimenti. Postalo je jasno da je kvaliteta slike vrlo niska, rezolucija mala, igrivi efekt kratak, a mogu\u0107nosti skromne. Osim toga, spinneri su nestali jednako brzo kao \u0161to su se pojavili. Odlu\u010deno je podi\u0107i latitudu i razviti rotiraju\u0107i stroboskopijski ekran. Njegovu upotrebu barem mo\u017eemo iskoristiti u prakti\u010dne svrhe na izlo\u017ebama i konferencijama, a interes za takva rje\u0161enja ne\u0107e uskoro nestati.<\/p>\n

\u0160to se ti\u010de konstrukcije, bila su dva glavna pitanja: kako rasporediti LED diode (u vertikalnoj ravnini, kao u primjeru iznad ili u horizontalnoj) i kako napajati rotiraju\u0107u plo\u010du s LED diodama.<\/p>\n

U obrazovne svrhe, LED diode su postavljene samo u horizontalnoj ravnini. \u0160to se ti\u010de napajanja plo\u010de, postojala je va\u017ena odluka: ili uzimamo kolektorski motor, glomazan, bu\u010dan, ali jeftin, ili koristimo elegantnije rje\u0161enje s be\u017ei\u010dnim napajanjem pomo\u0107u dvije zavojnice \u2013 jedna na motoru, a druga na plo\u010di. Rje\u0161enje je, naravno, elegantno, ali skuplje i du\u017ee, jer su zavojnice prvo trebale biti izra\u010dunate, a zatim namotane (po\u017eeljno ne improvizirano).<\/p>\n

\"Kako
\nOvako izgleda prototip koji je napravljen.<\/i><\/p>\n

Specifikacija proizvoda masovne proizvodnje takva je da svaki dodatni cent na tro\u0161kovima mo\u017ee biti presudan. Uspjeh mo\u017ee ovisiti o cijeni \u0161ake pasivnih komponenti. Stoga se \u010desto mora birati manje u\u010dinkovita, ali jeftinija opcija, kako bi proizvo\u0111a\u010d mogao zadr\u017eati komercijalnu konkurentnost. Stoga, uzimaju\u0107i u obzir da \u0107e rotacijski ekran biti pokrenut u masovnu proizvodnju, dizajner je odabrao kolektorski motor.<\/p>\n

Prototip koji je nastao prilikom pokretanja veselo je iskri\u010dio, bu\u010dio i tresao stol. Konstrukcija koja je osiguravala stabilnost bila je toliko te\u0161ka i obimna da nije imalo smisla dovoditi je do serijskog prototipa. Nakon \u0161to smo se obradovali privremenom uspjehu, odlu\u010deno je da se motor zamijeni rotiraju\u0107im transformatorom s zra\u010dnim razmakom. Jo\u0161 jedan razlog bila je nemogu\u0107nost napajanja motora iz USB porta ra\u010dunala.<\/p>\n

Osnova plo\u010de s LED diodama bio je na\u0161 modul RM10 i \u0161est LED drajvera. MBI5030<\/a><\/noindex>.<\/p>\n

Drajveri imaju 16 kanala s mogu\u0107no\u0161\u0107u neovisnog upravljanja svakim od njih. Tako, 6 takvih drajvera i 32 RGB LED dioda zajedno mogu prikazivati 16 milijuna boja.<\/p>\n

Za sinkronizaciju i stabilizaciju prikazanog sadr\u017eaja kori\u0161tena su dva magnetorezistivna Hallova senzora. MRSS23E<\/a><\/noindex>.<\/p>\n

Plan je bio jednostavan \u2013 senzor daje prekid za svaki okretaj plo\u010de, a takt izme\u0111u dva prolaza odre\u0111uje polo\u017eaj LED dioda i izra\u010dunava njihov azimut i iluminaciju u razvoju od 360 stupnjeva.<\/p>\n

No, ne\u0161to nije i\u0161lo kako treba \u2013 bez obzira na brzinu okretanja plo\u010de, senzor je nasumi\u010dno davao ili jedan ili dva prekida po prolazu. Tako je slika bila razmazana i skupljala se unutra.<\/p>\n

Zamjena senzora nije promijenila situaciju, stoga je Hallov senzor zamijenjen fotorezistorom.<\/p>\n

Tko ima ideje za\u0161to bi magnetorezistivni senzor mogao tako reagirati, neka podijeli u komentarima.<\/p>\n

\"Kako
\nGornja strana plo\u010de<\/i><\/p>\n

S opti\u010dkim senzorom slika postaje jasna, ali se stabilizira oko 30 sekundi. To se doga\u0111a iz vi\u0161e razloga, od kojih je jedan diskretnost timera. To je 4 milijuna tikova u sekundi, dijeli se na 360 stupnjeva s ostatkom, koji stvara izobli\u010denje u prikazanoj slici.<\/p>\n

U kineskim stroboskopskim satovima slika se postavlja u nekoliko sekundi po cijenu toga da mali segment kruga jednostavno nije prikazan: na kru\u017enoj slici prazno mjesto nije primjetno na tekstu, ali slika ispada nepotpuna.<\/p>\n

Me\u0111utim, problemi se nisu zavr\u0161ili. Mikrokontroler nRF52832<\/a><\/noindex> ne mo\u017ee osigurati potrebnu brzinu prijenosa podataka za mogu\u0107e nijanse (oko 16 MHz) \u2013 ekran daje 1 kadrom u sekundi, \u0161to je malo za ljudsko oko. O\u010dito, potrebno je postaviti zaseban mikrokontroler na plo\u010du za upravljanje slikom, a do tada je donesena odluka o zamjeni MBI5030 s MBI5039<\/a><\/noindex>. To je samo 7 boja, uklju\u010duju\u0107i bijelu, ali to je dovoljno za razradu softverskog dijela.<\/p>\n

I to nije neva\u017eno, zbog \u010dega je ovaj obrazovni zadatak i pokrenut \u2013 programirati mikrokontroler i omogu\u0107iti upravljanje putem aplikacije na pametnom telefonu.<\/p>\n

Trenutno se razrada prenosi putem Bluetootha izravno putem nRF Connect, a su\u010delje aplikacije je u razvoju.<\/p>\n

Tako su me\u0111uresultati rada \u0161tafetnog tima sljede\u0107i:<\/p>\n

Rotiraju\u0107i ekran ima niz od 32 LED dioda i promjer slike od 150 mm. Prikazuje 7 boja, postavlja slike ili tekst za 30 sekundi (\u0161to nije idealno, ali za po\u010detak je prihvatljivo). Putem Bluetooth veze mo\u017ee se dati naredba za promjenu slike.<\/p>\n

\"Kako
\nA ovako to izgleda<\/i><\/p>\n

A novim mladim razvija\u010dima preostaje rije\u0161iti sljede\u0107e zadatke za uspje\u0161no u\u010denje:<\/p>\n

Prevladati nedostatak RAM-a mikrokontrolera za punu boju prikaza palete boja. Dovr\u0161iti aplikaciju za oblikovanje i prijenos stati\u010dne ili dinami\u010dke slike. Dati konstrukciji zavr\u0161eni izgled. Odr\u017eavat \u0107emo vas obavije\u0161tenima.<\/p>\n

P.S. Naravno, nakon zavr\u0161etka rada na Bluetooth LE (nrf52832<\/a><\/noindex>) projektirat \u0107emo i implementirati Wi-Fi\/Bluetooth verziju na ESP32. No to \u0107e ve\u0107 biti nova pri\u010da.
\n\"Kako
\n
Izvor: habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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Po\u010detnik nema potrebnu specijaliziranu stru\u010dnost.","canonical_url":"https:\/\/prohoster.info\/hr\/blog\/administrirovanie\/kak-raskrutit-novichka-i-nichego-ne-slomat","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hr_HR","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041a\u0430\u043a \u0440\u0430\u0441\u043a\u0440\u0443\u0442\u0438\u0442\u044c \u043d\u043e\u0432\u0438\u0447\u043a\u0430 \u0438 \u043d\u0438\u0447\u0435\u0433\u043e \u043d\u0435 \u0441\u043b\u043e\u043c\u0430\u0442\u044c | ProHoster","og:description":"\u041f\u043e\u0438\u0441\u043a, 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