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12th November 2009 16:19 #1Registered User
Join Date: Apr:2004
Location: MainaTown
Posts: 160
USB çà çàðÿäíî ïðè èçèñêâàíèÿ çà 2À
Åäíî GPS óñòðîéñòâî èìà âõîä 5v, 2A. Èìà ëè îò êàêâî äà ñå ïðèòåñíÿâàì, àêî ãî çàðåæäàì ïðåç USB, ïðè ïîëîæåíèå ÷å ìàêñèìàëíèÿ òîê íà óñá-òî å 0.5À ?
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12th November 2009 16:34 #2
Drecky,
Î÷åðòàâàò ñå 2 âàðèàíòà:
1. Ïðåöàêâàø USB - òî , àêî íÿìà çàùèòà;
2. Åëåêòðîíèêàòà çà çàðÿä íå ðàáîòè äîáðå èëè èçîáùî íå ðàáîòè ( çàðÿäíîòî âúòðå â GPS-à å íàïðàâåíî ñúñ ñïåöèàëèçèðàí ÷èï , êîéòî ìîæå äà íå ðàáîòè , àêî íå ìó îñèãóðèø íåîáõîäèìèÿ òîê ). Òîâà çàâèñè îò âãðàäåíèÿ LiIon àêóìóëàòîð , êîéòî ñïîðåä êàïàöèòåòà ñè èçèñêâà îïðåäåëåí çàðÿäåí òîê è ñïåöèàëíà õàðàêòåðèñòèêà íà çàðÿäà. Ñàìî õèïîòåòè÷íî , 0,5À ìîãàò è äà ñòèãíàò çà çàðÿäà , àêî íèùî äðóãî âúòðå íå êîíñóìèðà òîöè.
Òè ðåøàâàø.
Last edited by nickarsow; 12th November 2009 at 16:51.
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12th November 2009 16:41 #3
Èëè USB-òî ùå èçêëþ÷è (çàùîòî ñè èìà òîêîâà çàùèòà), èëè âñè÷êî ùå ñè ðàáîòè êàêòî òðÿáâà. Åäèíñòâåíî áàòåðèÿòà íà GPS-à ùå ñå çàðåæäà ïî-áàâíî.
Íèêîãà íå å êúñíî äà ñòàíåø çà ðåçèë!
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12th November 2009 16:59 #4
Ìàêñèìàëíèÿ òîê íà USB-òî íå å 0.5À. Â ñïåöèôèêàöèèòå ïèøå ñëåäíîòî:
In Battery Charging Specification[33], new powering modes are added to the USB specification. A host or hub Charging Downstream Port can supply a maximum of 1.5 A when communicating at low-speed or full-speed, a maximum of 900 mA when communicating at high-speed, and as much current as the connector will safely handle when no communication is taking place; USB 2.0 standard-A connectors are rated at 1500 mA by default. A Dedicated Charging Port can supply a maximum of 1.8 A of current at 5.25 V. A portable device can draw up to 1.8 A from a Dedicated Charging Port. The Dedicated Charging Port shorts the D+ and D- pins with a resistance of at most 200Ω. The short disables data transfer, but allows devices to detect the Dedicated Charging Port and allows very simple, high current chargers to be manufactured. The increased current (faster, 9W charging) will occur once both the host/hub and devices support the new charging specification.ASRock B85 Pro4, Pentium G3240, DD3 8GB/1333MHz, 120GB SSD + 1TB + 640GB HDD
Gigabyte GV-R657OC-1GI, CM B500, ASUS 24B1S1, LCD SAMSUNG SM931BW, ÌÅ173Õ
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12th November 2009 17:19 #5
Drecky,
Íàé-ëåñíî å äà ïîãëåäíåø äúííàòà ïëàòêà . Òúðñèø çàä USB ñúåäèíèòåëèòå êîìïîíåíò ñ ðàçìåðè îêîëî 3õ5ìì â çåëåí èëè ÷åðåí öâÿò. Âúðõó íåãî èìà îìåãà îáðàçíà çîíà. Íà íåãî ïèøå 0,5À èëè 1À èëè 2À. Àêî ïèøå 2À - äàâàé ñìåëî.
Ïî ìîåòî ñêðîìíî ìíåíèå USB 2.0 äàâà äî 500ìÀ , çà USB 3.0 íå ñúì ñèãóðåí , ìîæå äà å è ïîâå÷å.Last edited by nickarsow; 12th November 2009 at 18:56.
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12th November 2009 18:57 #6Registered User
Join Date: Apr:2004
Location: MainaTown
Posts: 160
Çíà÷è áàòåðèÿòà ìó áåøå ïàäíàëà íà 100% è êàòî ãî âêëþ÷èõ â þñá-òî ñå ïóñíà è çàïî÷íà äà ñè ðàáîòè è ñàòåëèòèòå ñè íàìåðè è áàòåðèÿòà òðúãíà äà çàðåæäà.. âñè÷êî 6. Ïîñëå ãî ñïðÿõ è ãî îñòàâèõ äà ñå çàðåæäà êàêòî å sut down, äàíî íå ìó ñå ïðåöôàêà íåùî.




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