USB yog ib lwm lub tsheb loj txheem, ib lub specification rau computer thiab lwm li mus txuas thiab sib tham.USB interface txhawb Plug thiab ua si li thiab kub-sib puav muaj rab peev xwm.USB interface siv coj mus cuag li 127 peripherals, xws li nas tsuag, modems, thiab cov twj remote controls.USB yog xaus 1994 Intel, Compaq, IBM, Microsoft thiab lwm tuam txhab uas muag ntawv tau npaj tseg, vim hais tias nws lub taw qhia rau 1996, tsawg ntse hloov serial thiab rau thaum uas tig mus ports, thiab muaj coob tus personal computers thiab ntse li yuav tsum yuav nruab muaj lub interface ntawmnyias.Ntawm lub kaum ib hlis 11, 1994 xa rau koj tom qab ib version USB V0.7, USB version tau ncaim mus txog xyoo ntawm txoj kev loj hlob, nws muaj tam sim no tsim rau hauv version 3.0.
usb positive thiab negative txhim kho
Vim tus IPAD yuav tsis siv ib USB charger zoo tib yam vim tus charger yuav tsum tau mus cuag 5.1V 2A fais fab tuag tau.
Tsis ntev los no puas tau ib USB charger nyob mus tib seem, ntawd ces yog muaj ib cov zis parameter rau lub 5V 3A fais adapter, txuas nrog lub chaw nres nkoj USB ntawm ib logarithmic Circuit Court txuas nrog rau mus tib seem, kom koj tau ua kom tus dais thaum muab ob peb.
IPAD yuav ua tau ib txoj hauj lwm zoo thiab rau qhov them ob tes txawb ib txhij.Tswjhwm Circuit Court li ntawd tsis pub koj ib me ntsis insecure.
Peb xav kom tej kev txhim kho:
1, USB interface los polarity tsis zoo no feem kev tiv thaiv.Thiab cov USB interface mus ua hauj lwm tsis puas tabkaum neb sib
2, thaum koj ntxig ib USB ntaus, xim conversion interface muaj and LED.(Yam li cov neeg coj standby zaub ntsuab, liab tso nrog, faulty flashing thiab yuav disconnect khoom tiv)
2, yuav cob lub interface nyog ntaus ntawv raws li qhov tam sim no thiab voltage.(Txoj kev txhim kho no yuav tsum ignored)
3, tus interface yuav tau tshaj txhua USB tej ntaub ntawv hloov (ie ib hub, tab sis tsis paub npaj 2.0hub USB interface nrog positive thiab negative polarity zog mov 5V3A docking tau)
