{"id":38728,"date":"2019-10-31T22:25:33","date_gmt":"2019-10-31T19:25:33","guid":{"rendered":"https:\/\/prohoster.info\/blog\/poddelnye-ds18b20-waterproof-chto-delat\/"},"modified":"2019-10-31T22:25:33","modified_gmt":"2019-10-31T19:25:33","slug":"poddelnye-ds18b20-waterproof-chto-delat","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/poddelnye-ds18b20-waterproof-chto-delat","title":{"rendered":"DS18B20 waterproof t\u00eb rrem\u00eb: \u00e7far\u00eb t\u00eb b\u00ebni?","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

P\u00ebrsh\u00ebndetje! Ky artikull trajton problemin e sensor\u00ebve t\u00eb rrem\u00eb, kufizimet e pajisjeve ekzistuese q\u00eb p\u00ebrdorin k\u00ebta sensor\u00eb dhe zgjidhjen e k\u00ebtij problemi.<\/p>\n

\"DS18B20
\nBurimi: ali-trends.ru<\/i><\/p>\n

M\u00eb par\u00eb p\u00ebr sensor\u00ebt e rrem\u00eb \u00ebsht\u00eb shkruar edhe k\u00ebtu<\/a><\/noindex>. Dallimet karakteristike t\u00eb sensor\u00ebve t\u00eb rrem\u00eb nga origjinali:<\/p>\n

    \n
  1. Sensori, edhe kur \u00ebsht\u00eb i lidhur n\u00eb af\u00ebrsi, n\u00eb modalitetin e energjis\u00eb parazite p\u00ebrgjigjet pa siguri, her\u00eb pas here.<\/li>\n
  2. N\u00eb modalitetin e energjis\u00eb parazite, niveli i lart\u00eb rikuperohet shum\u00eb ngadal\u00eb (mund t\u00eb mashet me nj\u00eb mikrocontroler ose t\u00eb shihet n\u00eb oscilogram\u00eb)<\/li>\n
  3. konsumi i rrym\u00ebs \u00ebsht\u00eb ndjesh\u00ebm m\u00eb i lart\u00eb se disa mikroamper\u00eb (GND dhe VCC n\u00eb negativ, DQ p\u00ebrmes mikroampermetrit n\u00eb +5 volte)<\/li>\n
  4. Pas procedur\u00ebs s\u00eb listimit (0xF0), sensor\u00ebt nuk p\u00ebrgjigjen n\u00eb komand\u00ebn p\u00ebr t\u00eb lexuar sk\u00ebr\u00e7padin (0xBE)<\/li>\n
  5. Temperatura e lexuar nga sk\u00ebr\u00e7padin pas furnizimit me energji pa komand\u00ebn p\u00ebr matje ndryshon nga 85,0 grad\u00eb.<\/li>\n
  6. Vlerat n\u00eb sk\u00ebr\u00e7padin n\u00eb pozitat 5 dhe 7 nuk p\u00ebrputhen me 0xFF dhe 0x10.<\/li>\n
  7. Vlerat e temperatur\u00ebs (n\u00eb dy pozitat e para t\u00eb sk\u00ebr\u00e7padit) t\u00eb lexuara pas aktivizimit t\u00eb par\u00eb t\u00eb sensorit t\u00eb \u00e7akorduar pa nj\u00eb komand\u00eb paraprake p\u00ebr matje, kthejn\u00eb vler\u00ebn e m\u00ebparshme, jo 50 05 (85.0 grad\u00eb).<\/li>\n<\/ol>\n

    \n<\/a><\/noindex>
    \nFatkeq\u00ebsisht, nuk kam nj\u00eb osciloskop, dhe si nj\u00eb bank\u00eb provimi ka sh\u00ebrbyer GPS-tracker Galileosky BaseBlock Lite. <\/p>\n

    Sensor\u00ebt jan\u00eb bler\u00eb nga furnizues t\u00eb ndrysh\u00ebm, dhe vet\u00ebm nj\u00eb d\u00ebrges\u00eb punoi me furnizim parazitar. Jan\u00eb bler\u00eb gjithsej 5 d\u00ebrgesa me nga 50 cop\u00eb.
    \nT\u00eb tjerat nuk punuan aspak me furnizim parazitar. Terminali nuk parashikon furnizim t\u00eb jasht\u00ebm p\u00ebr sensorin, dhe montimi i sistemit n\u00eb automobil duhet t\u00eb jet\u00eb sa m\u00eb i thjesht\u00eb.<\/p>\n

    Zgjidhja e problemit<\/h2>\n

    \nPra, sensor\u00ebt jan\u00eb bler\u00eb, por vet\u00ebm nj\u00eb d\u00ebrges\u00eb punoi si\u00e7 duhet, dhe do t\u00eb duhej nj\u00eb koh\u00eb e konsiderueshme p\u00ebr t\u00eb hetuar dhe porositur nj\u00eb d\u00ebrges\u00eb t\u00eb re, duke sjell\u00eb gjithashtu shpenzime t\u00eb tep\u00ebrta. Prandaj, problemin duhej ta zgjidhnim me forcat tona.<\/p>\n

    Duke p\u00ebrdoret vet\u00ebm nj\u00eb skem\u00eb me dy wires, \u00ebsht\u00eb e nevojshme t\u00eb organizohet furnizimi i sensorit nga linja sinjalit, pra, t\u00eb organizohet furnizimi parazitar. Un\u00eb organizova furnizimin parazitar sipas k\u00ebsaj skeme:<\/p>\n

    \"DS18B20
    \n
    \nN\u00eb k\u00ebt\u00eb skem\u00eb \u00ebsht\u00eb p\u00ebrmir\u00ebsuar funksionimi i furnizimit parazitar, por, nj\u00ebkoh\u00ebsisht, \u00ebsht\u00eb l\u00ebn\u00eb mund\u00ebsia p\u00ebr t\u00eb lidhur nj\u00eb furnizim t\u00eb jasht\u00ebm. N\u00eb k\u00ebt\u00eb rast pak ndryshon skema e lidhjes: kur lidhet nga furnizimi parazitar, kabla Vcc nuk p\u00ebrdoret<\/u>.<\/p>\n

    Pas p\u00ebrfundimit t\u00eb skem\u00ebs me montim t\u00eb varur, sensori u zbulua nga terminali me kapacitetin e kondensatorit 1 \u00b5F. P\u00ebr shp\u00ebrndarje masive \u00ebsht\u00eb projektuar dhe porositur qarqe modulare me qarqe t\u00eb furnizimit parazitar:<\/p>\n

    \"DS18B20
    \n
    \nNj\u00eb moment interesant:<\/b> p\u00ebr hermetizimin e sensorit prodhuesit mund t\u00eb p\u00ebrdorin ngjit\u00ebs termik ose silikon. N\u00eb rastin e par\u00eb, mund t\u00eb ngroh\u00ebn gypin, t\u00eb nxirret sensori, t\u00eb integorohet plaka, t\u00eb kthehet n\u00eb gyp dhe t\u00eb derdhet p\u00ebrs\u00ebri ngjit\u00ebs termik. N\u00eb rastin e dyt\u00eb, kjo nuk do t\u00eb funksionoj\u00eb, dhe ishte e nevojshme t\u00eb soldoheshin plakat af\u00ebr sensorit, t\u00eb derdhen ngjit\u00ebs termik dhe t\u00eb vendoset termoizolimi, si rezultat ai duket k\u00ebshtu:<\/p>\n

    \"DS18B20
    \n<\/p>\n

    P\u00ebrfundimi<\/h2>\n

    \nK\u00ebtu d\u00ebshiroj t\u00eb ftoj prodhuesit e pajisjeve t\u00eb marrin parasysh k\u00ebt\u00eb \u00e7\u00ebshtje n\u00eb produktet e tyre, shit\u00ebsit - t\u00eb kontrollojn\u00eb sensor\u00ebt p\u00ebrpara shitjes ose m\u00eb mir\u00eb t\u00eb mos ken\u00eb asnj\u00eb marr\u00ebdh\u00ebnie me furnizuesit q\u00eb ofrojn\u00eb sensor\u00eb t\u00eb falsifikuar, dhe p\u00ebrdoruesit - t\u00eb ndri\u00e7ojn\u00eb k\u00ebt\u00eb tem\u00eb n\u00eb komente, letra ose ankesa.
    \n
    Burimi:     habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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