Ina kwana! Wannan labarin yana nuna matsalar na'urori masu auna firikwensin karya, iyakancewar na'urorin da ke amfani da waɗannan na'urori masu auna firikwensin da kuma maganin wannan matsala.
Source: ali-trends.ru
Kafin ni, an kuma rubuta game da na'urori masu auna firikwensin karya . Bambance-bambance tsakanin na'urori masu auna firikwensin karya da na asali:
- Na'urar firikwensin, ko da an haɗa shi a kusa, yana amsawa a yanayin ƙarfin parasitic ba tare da tabbas ba, kowane lokaci kaɗan.
- A cikin yanayin ƙarfin parasitic, babban matakin yana ɗaukar tsayi da yawa don murmurewa (zaka iya auna shi da microcontroller ko kallon oscillogram)
- Amfani na yanzu yana da girma fiye da yawancin microamps (GND da VCC zuwa ragi, DQ ta microammeter zuwa +5 volts)
- Bayan tsarin ƙidayar (0xF0), na'urori masu auna firikwensin ba sa amsa umarnin karanta scratchpad (0xBE)
- Matsakaicin zafin da ake karantawa daga tarkace bayan an yi amfani da wuta ba tare da umarnin auna ba ya bambanta da digiri 85,0.
- Ƙimar scratchpad a matsayi na 5 da 7 ba su dace da 0xFF da 0x10 ba.
- Ma'aunin zafin jiki (a cikin matsayi biyu na farko na scratchpad) karanta bayan kunna na farko na firikwensin da aka kashe ba tare da umarnin auna da aka bayar a baya ba ya dawo da ƙimar da ta gabata, kuma ba 50 05 (digiri 85.0).
Abin takaici, ba ni da oscilloscope, kuma Galileosky BaseBlock Lite GPS tracker yayi aiki azaman benci na gwaji.
An sayi na'urori masu auna firikwensin daga masu siyar da su daban-daban, kuma rukuni ɗaya ne kawai ke aiki saboda ƙarfin parasitic. Kuri'a 5 ne kawai na guda 50 aka saya.
Sauran ba su yi aiki ba saboda ikon parasitic kwata-kwata. Tashar ba ta samar da wutar lantarki ta waje don firikwensin, kuma shigar da tsarin akan abin hawa ya kamata a sauƙaƙe gwargwadon yiwuwar.
Shirya matsala
Don haka, an sayi na'urori masu auna firikwensin, amma rukuni ɗaya ne kawai ya yi aiki daidai, kuma bincike da odar sabon tsari zai ɗauki lokaci mai kyau, kuma zai haifar da hauhawar farashin kaya. Don haka dole ne a magance matsalar da kanta.
Tun da kawai ana amfani da da'irar waya guda biyu, wajibi ne don tsara wutar lantarki zuwa firikwensin daga siginar siginar, wato, don tsara ikon parasitic. Na tsara ikon parasitic bisa ga makirci mai zuwa:
A cikin wannan makirci, aikin ikon parasitic yana inganta, amma a lokaci guda, yana yiwuwa a haɗa ikon waje. A wannan yanayin, hoton haɗin yana canzawa kaɗan: lokacin haɗawa ta hanyar ƙarfin parasitic, wayar Vcc ba amfani.
Bayan haɗa da'irar ta hanyar hawa sama, an gano firikwensin ta tashar tare da iyawar capacitor na 1 µF. Don aiwatar da yawan jama'a, an ƙirƙira allunan da aka zana tare da allunan wutar lantarki na parasitic kuma an ba da umarnin:
Batu mai ban sha'awa: Masu sana'a na iya amfani da manne narke mai zafi ko silicone don rufe firikwensin. A cikin akwati na farko, zaka iya zafi hannun riga, cire firikwensin, saka allon, mayar da shi zuwa hannun riga kuma cika shi da manne mai zafi. A cikin akwati na biyu, wannan ba zai ƙara yin aiki ba, kuma dole ne in sayar da allon kusa da firikwensin, cika shi da manne mai zafi sannan in sanya zafi mai zafi, sakamakon haka ya kasance kamar haka:
ƙarshe
Anan ina kira ga masu kera na'ura da su yi la'akari da wannan batu a cikin samfuran su, kuma masu siyar da su bincika na'urori masu auna firikwensin kafin su sayar ko kada su yi mu'amala da mai kaya kwata-kwata idan sun samar da na'urori na jabu, masu amfani da su don haskaka wannan batu a cikin sharhi, haruffa. ko buƙatun.
source: www.habr.com