????? ????????? ???? ?????? ? ?????

18-Oct-2015Electronics

???????- 12V ???? ???? ????? ?????? ?????? (0.7×10)=7v ???? ??? (12v-7v)= 5v ?????? ?????? ????? ????? ???? ?? ? ??? ???????? ??? ????? ??? ?? ? ?? ??? ?? ????? ????? ??? ???? ??? ??? ?

???? ?? ??????? ?????? ? ??? ????? ??? ????? Power circuit ??????? ??? ??? ?

??????- ? ???????? ???? Volt drop ??? 5V ??, ?????? ?? ???? ???? ?????? ????? ???? ????? ??, ??? ????? ????? ???????? ???? ??? ???? ???? ? ???? ???????? ??? ? ????? ?????? ???? ????? ????, ???? ????????? ?

???? ???? ????????? ????? ?????? ????-??????? ???,??????? ? ???????????? ???????? ??????? ??????? ??????? ???? 0.3 ???? 0.7 Volt drop ??? ???? ? (??????????? ??????? 0.3v ? ?????? ??????? ???????? 0.7v ??? ?? ? )

??? 1N4007 ?? ????? ???? 0.7 Volt ? ?? ??????? ???? ?????? 10×0.7 = 7V ?? ? ????? (12v – 7v) = 5V ?? ???? ? ????? ???????? ??? ???? ????? ????, ??? ????? Power source ?? ???????? 1Amp ?????? ??????? ??, ?? ???????? ?????? ????? ????? ????? ?

?????? ??? ????? Power Source ?? 1Amp ?? ????? ???? ?????? 2/3/5Amp ?? ??? ????? ???? ?????? ??????? ?? ?? ???????? ????? ???????? ???? ??????? ????????? ?????? TR/mosfet/ ic ????????? ???? ??? ???? ? ???? ????? ????? ??????? ??? Volt drop ??? ???? ?????? Current Controll ???? ??, ????? Current limite ?? ???????? ?? ????? ??????? ??????? ?????? TR/mosfet/IC ????????? ???? ???? ? ????????? ????? ????? over current ???????? ??? 1N4007 ????? ????? ???? ??? ???? ? ??? ?? ???????? ?????? ????? ?? ???? ??? ???????? ?????? ?? ?????? ???? ?

?????? ?????? ???? ???????? ic 7805 ???? Lm317T ic ??????? power cicuit ??????? ???? ???? ? ??? ???? Amp ? power loss ?????? ??????? ??, ?? ???????? ???? Lm 2576-5v ic ????? power circuit ??????? ???? ????, ??? ???? ???????? ? ????? ??? ??? ?

???????- ????? ?????? ????? ???? Volt drop ?? ?????? Current controll ???? ?? ??? ? ?????????? ??????? ?????? ???? ????????????? ???? ????? ????? ??? Current Controll ???? ?? ?

??????- ??? ??????? ?????? ????? ??????? ??? ? ??????? ??????? silicon diode ?? ???????? (0.5K ???? 1.2K ) ?????, ??? ?? ??????? dynamic resistance ???????? ??? ? ?????? ??? conductive ??????? ?? ??????? ???? ???? ??? ??????? ???????? ??? ???? ??? ??????? Forward resistance (????????? ???) ???? ???? ?

diodes01??? ??????? ????? (Electron ? Hole) ?????? Charge carrier ????? ????, ??????? (conductivity) ???????????? ?? ?????? ???? ??? (forward Resistivity) ???????????? ???? ????, ???? ??????? ???? ?silicon diode ?? ???????? Voltage drop 0.6v-0.7v ??? Resistive drop 0.3v-0.5v ??? ?? ?

images (9)?????? ??? ??????? (Anode) ????? ??? 0.7v+0.3 to 0.5v ?? 1v ????1.2v ??????? ??? ??? conductivity (???????????) ?????? ???? ???? ? ??????? ???? ???? ??????? ???????? ??? ???? ??? ??? Forward resistance ???????? ????????????? ???? ????, ???? ???? 0.10 ???? ?? 0 ??? ????? ???????? ??? ??? ? ????? ????????? ??? ???? ?? ???? ?????, ?? ?????? ??? ?? ?? ??? ????? ????? Volt drop ??? ?????? Current controll ??? ?? ?

???????? Lutfur Rahman Babul
Facebook Link : https://www.facebook.com/mohd.lutfur.9

?????? ?? ???? ???? ?????? ??? ?????? - amaderelectronics.com

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