Dual Voltage Tswj Cov Khoom Siv Hluav Taws Xob: 4 Cov Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:30

Ib tus phooj ywg ntawm kuv tus uas siv lub khw hluav taws xob xav teeb tsa lub CD-rom qub los siv ua chaw nyob ib leeg cd-player hauv nws lub tsheb. Nws qhov teeb meem yog txhawm rau nrhiav lub zog tsim nyog rau lub hom phiaj no. CD-rom siv 2 lub zog siv hluav taws xob, 5 Volts uas tau siv hauv nws cov logic Circuit thiab 12 Volts rau nws cov servos. Nrog cov ntsuas no kuv xav tau los ua tus tswj hwm ob leeg uas ua rau 5 Volts thiab 12 Volts tso tawm hauv ib qho hluav taws xob nkag. Cov tsheb thauj khoom feem ntau siv 2 lub roj teeb ua kua qaub uas yuav nyob ib puag ncig 24 Volts.

Cd-rom siv ib puag ncig 1.5 Amperes ntawm tam sim no rau 5 Volts thiab 2 Amperes rau 12 Volts. Xav txog txhua qhov kev xav tau, siv ob 7805 tus tswj hwm rau 5 Volt cov khoom yuav txaus tab sis peb xav tau tam sim no siab dua rau 12 Volts. Siv cov txheej txheem "tsev kawm qub", peb yuav siv ib qho 7812 tus tswj hwm tab sis muab cov transistor ntxiv los ua cov nqaij nyug nws lub peev xwm tam sim no txog 5 Amps. Kuv paub nws yog overkill tab sis zoo dua li thov txim.

Kauj Ruam 1: PCB thiab Sib dhos

Daim Ntawv Teev Npe:

IC1 thiab IC2 - 7805 series tswj IC3 - 7812 series tswj Q1 - MJ2955 NPN Transistor R1 - 1 ohm /.5 watt resistor R2 - 10 ohms /.5 watt resistor C1 thiab C2 - 4700 uF / 16 Volts electrolytic capacitor Heatsink Siv daim duab ua PCB, koj tuaj yeem pom nws hauv kuv qhov blog yav dhau los. Tso cov rhaub dej kom txaus rau txhua tus IC kom tswj tau cua sov. Kuv tus PCB tsim rau daim duab, qhov no ua tau raws li kuv txoj kev npaj tso txhua tus tswj hwm thiab cov transistor hauv ib lub heatsink. Kuv tau ntsia tag nrho cov cua sov tsim cov khoom siv tsuas yog ib lub rhaub dej, raws li koj tuaj yeem pom, qhov nruab nrab yog MJ2955 transistor, ob lub 7805 nyob rau sab xis, thiab 7812 nyob rau sab laug.

Kauj ruam 2: Kev kaw thiab Kev Xeem

Kuv yuav qee qhov yas ntim rau hauv qhov project. Drilled qee qhov ntawm nws kom muaj cua sov tsim nyog. Thaum kuaj, MJ2955 tsim cua sov tab sis tsis ntau, kuv tseem tuaj yeem kov nws. Txuas nws mus rau CD-Rom yog lub hnub qub rau pem hauv ntej thiab nws ua si tam sim ntawd. Lub tswv yim, qhov no kuj tseem siv tau los muab Hard Drives tab sis kuv tseem yuav tau sim qhov no kuv tus kheej. Kuv mam li tshaj tawm tshiab sai sai. Color Configuration rau MOLEX txuas: Daj - 12 VoltsBlack - Av/NegativeRed - 5 Volts

Ob zaug kos qhov no ua ntej txuas rau koj daim CD-ROM, qhov no yuav FRY koj lub cuab yeej yog thim rov qab

Kauj Ruam 3: Hloov daim duab

Txhawm rau hais lus tawm ntawm koocotte hais txog qhov sib txawv ntawm qhov sib txawv ntawm ob 7805 tus tswj hwm, Kuv tau ntxiv ob lub diodes rau pem hauv ntej kev tsis ncaj ncees ntawm txhua qhov tso tawm hauv Circuit Court.

Kauj Ruam 4: Voltage Spike thiab Voltage Drop Issues

-Txoj kev tswj hwm qhov zoo thiab qhov tsis zoo tshwm sim los ntawm kev siv tshuab thaum tig lub tsheb tawm (toma cov lus pom), tus choj zener yooj yim yuav ua qhov dag. Qhov no yuav "tswj hwm ua ntej" qhov hluav taws xob nkag mus rau cov tswj hwm.

1N5359B zener diodes - 2 pcs. -Txhua yam rau qhov poob qis tshwm sim los ntawm cov diode uas peb txuas nrog hauv cov zis (+/-. 7 volts), tsuas yog hloov ob lub 7805's nrog 7806's. Qhov no yuav muab peb kwv yees li 5.3 volts hauv qhov tso tawm.