Kev Xeem Tseem Ceeb hauv Electronics: 7 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:24

Cov Lus Qhia no yog npaj siab teev qee qhov kev suav tseem ceeb hauv cov tshuab hluav taws xob/cov tsim khoom yuav tsum tau paub txog. Ncaj nraim muaj ntau ntau cov qauv uas tuaj yeem haum rau pawg no. Yog li kuv tau txwv qhov Kev Qhia Qhia rau cov qauv yooj yim nkaus xwb.

Rau feem ntau ntawm cov qauv teev tseg Kuv tseem tau ntxiv txuas rau cov laij lej online uas tuaj yeem pab koj ua cov lej no tau yooj yim thaum nws dhau mus nyuaj thiab siv sijhawm ntau.

Kauj Ruam 1: Lub Tshuab Roj Teeb Lub Neej

Thaum lub zog ua haujlwm siv cov roj teeb, nws yog qhov tseem ceeb uas peb paub lub sijhawm xav tau lub roj teeb tuaj yeem ua hluav taws xob rau koj lub Circuit/ ntaus ntawv. Qhov no yog qhov tseem ceeb kom txuas lub neej ntawm roj teeb thiab tiv thaiv kev ua tsis tiav ntawm koj txoj haujlwm. Muaj ob lub mis tseem ceeb cuam tshuam nrog qhov no.

Lub sijhawm ntev tshaj plaws lub roj teeb tuaj yeem ua lub zog thauj khoom

Roj teeb lub neej = Roj teeb muaj peev xwm (mAh lossis Ah) / Load tam sim no (mA lossis A)

Tus nqi ntawm qhov uas rub tawm tam sim no los ntawm roj teeb

Tus nqi tso tawm C = Thauj khoom tam sim no (mA lossis A) / Roj teeb muaj peev xwm (mAh lossis Ah)

Tus nqi ntawm kev tso tawm yog qhov ntsuas tseem ceeb uas txiav txim siab ntau npaum li cas tam sim no hauv Circuit Court tuaj yeem nyab xeeb los ntawm lub roj teeb. Qhov no feem ntau yog cim hauv lub roj teeb lossis yuav muab rau hauv nws daim ntawv teev npe.

Piv txwv:

Roj teeb muaj peev xwm = 2000mAh, Load tam sim no = 500mA

Roj Teeb Lub Neej = 2000mAh / 500mA = 4 teev

Tus nqi tso tawm C = 500mA/2000mAh = 0.25 C

Nov yog Lub Tshuab Roj Teeb Lub Neej Hauv Online.

Kauj Ruam 2: Tawm Txoj Cai Tswj Lub Hwj Chim Tawm

Cov cai tswj kab tawm tau siv thaum peb xav tau qhov hluav taws xob ruaj khov rau lub zog hluav taws xob lossis khoom siv. Qee qhov nrov Linear voltage regulators yog 78xx series (7805, 7809, 7812 thiab ntxiv rau). Cov kab tswj kab no ua haujlwm los ntawm kev xa cov hluav taws xob nkag mus thiab muab cov hluav taws xob tso tawm tsis tu ncua hauv cov zis. Lub zog tso tawm hauv cov kab tswj kab no feem ntau raug saib xyuas. Paub txog lub zog tawm mus yog qhov tseem ceeb heev yog li cov tsim qauv tuaj yeem siv cov cua sov los txhawm rau txhawm rau lub zog tawg loj. Qhov no tuaj yeem suav nrog siv cov qauv hauv qab no

Lub zog tso tawm yog muab los ntawm tus qauv

PD = (VIN - VOUT) x IOUT

Los xam cov zis tam sim no

IOUT = PD / (VIN - VOUT)

Piv txwv:

Cov tswv yim hluav taws xob - 9V, tso zis hluav taws xob - 5V, Tam sim no tso tawm -1A Cov txiaj ntsig

PD = (VIN - VOUT) x IOUT

= (9 - 5) * 1

= 4 Wm

Lub laij lej online rau kev tswj kab hluav taws xob tso tawm hluav taws xob.

Kauj Ruam 3: Voltage Divider Calculator

Cov hluav taws xob faib hluav taws xob tau siv los faib cov khoom hluav taws xob nkag mus rau theem qhov xav tau. Qhov no muaj txiaj ntsig zoo los tsim cov khoom siv hluav taws xob hauv cov hluav taws xob. Kev faib hluav taws xob feem ntau tsim los siv tsawg kawg yog ob tus tiv thaiv. Kawm paub ntau ntxiv txog kev faib cov hluav taws xob ua haujlwm li cas. Cov mis siv nrog cov faib hluav taws xob yog

Txhawm rau txiav txim siab qhov tso tawm qhov hluav taws xob Vout = (R2 x Vin) / (R1 + R2)

Txhawm rau txiav txim siab R2 R2 = (Vout x R1) / (Vin - Vout)

Txhawm rau txiav txim siab R1 R1 = ((Vin - Vout) R2) / Vout

Txhawm rau txiav txim siab qhov hluav taws xob Vin = (Vout x (R1 + R2)) / R2

Piv txwv:

Vin = 12 V, R1 = 200k, R2 = 2k

Vout = (R2 x Vin) / (R1 + R2)

Vout = (2k x 12)/(200k+2k)

=0.118

0.12 V = np

Kauj Ruam 4: RC Sijhawm Lij Choj

RC circuits tau siv los tsim lub sijhawm qeeb hauv ntau lub voj voog. Qhov no yog vim qhov ua ntawm resistor cuam tshuam rau kev them nqi tam sim no uas ntws mus rau lub capacitor. Qhov ntau dua qhov tsis kam thiab lub peev xwm, ntau lub sijhawm nws yuav siv rau lub capacitor kom them thiab qhov no yuav nthuav tawm raws li ncua. Qhov no tuaj yeem suav nrog siv cov mis.

Txhawm rau txiav txim lub sijhawm hauv vib nas this

T = RCA

Txhawm rau txiav txim siab R.

R = T / C

Txhawm rau txiav txim siab C.

C = T / R

Piv txwv:

R = 100K, C = 1uF

T = 100 x 1 x 10^-6

T = 0.1 hli

Sim ua lub sijhawm RC tas mus li lub laij lej online.

Kauj ruam 5: LED Resistor

LEDs feem ntau yog hluav taws xob hluav taws xob. Tsis tas li ntawd LEDs yuav siv feem ntau nrog kev txwv tam sim no tiv thaiv kom tiv thaiv kev puas tsuaj tam sim no. Qhov no yog cov qauv siv los laij cov nqi tiv thaiv kab mob siv nrog LED

R = (Vs - Vf) / Yog

Piv txwv

Yog tias koj siv LED nrog Vf = 2.5V, Yog = 30mA thiab Cov tswv yim hluav taws xob Vs = 5V. Tom qab ntawd tus resistor yuav yog

R = (5 - 2.5V) / 30mA

= 2.5V / 30mA

= 83 AWM

Kauj Ruam 6: Astable thiab Monostable Multivibrator Siv IC 555

555 IC yog ntau yam nti uas muaj ntau yam kev siv. Txoj cai los ntawm kev tsim cov xwm txheej tsis xwm yeem, hloov kho, ncua sijhawm, ua kom lub cuab yeej ua haujlwm, 555 tuaj yeem ua txhua yam. Astable thiab Monostable yog ob hom uas nquag siv thaum los txog 555.

Astable multivibrator - Nws ua rau lub plawv yoj mem tes raws li cov zis nrog tsau zaus. Qhov zaus no yog txiav txim siab los ntawm cov neeg tawm tsam thiab cov khoom siv nrog nws.

Nrog muab RA, RC thiab C qhov tseem ceeb. Zaus Zis thiab Duty voj voog tuaj yeem suav nrog siv cov qauv hauv qab no

Zaus = 1.44 / ((RA +2RB) C)

Duty cycle = (RA + RB) / (RA + 2RB)

Siv RA, RC thiab F qhov tseem ceeb, Capacitance tuaj yeem suav nrog siv cov qauv hauv qab no

Capacitor = 1.44 / ((RA + 2RB) F)

Piv txwv:

Kuj RA = 10 kohm, Kuj RB = 15 kohm, Capacitance C = 100 microfarads

Zaus = 1.44 / ((RA+2RB)*c)

= 1.44 / ((10k+2*15k)*100*10^-6)

= 1.44 / ((40k)*10^-4)

= 0.36 Hz

Duty cycle = (RA+RB)/(RA+2RB)

= (10k+15k)/(10k+2*15k)

= (25k)/(40k)

=62.5 %

Monostable multivibrator

Hauv hom IC no 555 yuav ua lub teeb liab siab rau qee lub sijhawm ntawm lub sijhawm thaum cov lus tawm mus qis. Nws yog siv los tsim lub sijhawm qeeb.

Nrog muab R thiab C, peb tuaj yeem suav lub sijhawm ncua siv cov qauv hauv qab no

T = 1.1 x R x C

Txhawm rau txiav txim siab R.

R = T / (C x 1.1)

Txhawm rau txiav txim siab C.

C = T / (1.1 x R)

Piv txwv:

R = 100k, C = 10uF

T = 1.1 x R x C

= 1.1 x 100k x 10uF

= 0.11sec

Nov yog lub laij lej online rau Astable multivibrator thiab Monostable multivibrator

Kauj Ruam 7: Kuj, Voltage, Tam Sim No thiab Fais Fab (RVCP)

Peb yuav pib los ntawm qhov pib. Yog tias koj tau qhia rau hluav taws xob koj yuav tau paub qhov tseeb tias Kuj, Voltage, Tam sim no thiab Lub Hwj Chim yog txhua yam cuam tshuam nrog. Hloov ib qho ntawm cov saum toj no yuav hloov lwm qhov txiaj ntsig. Cov mis rau qhov xam no yog

Txhawm rau txiav txim siab voltage V = IR

Txhawm rau txiav txim siab tam sim no kuv = V / R

Txhawm rau txiav txim siab tsis kam R = V / I

Los xam lub zog P = VI

Piv txwv:

Cia peb xav txog qhov tseem ceeb hauv qab no

R = 50 V, kuv = 32 mA

V = I x R

Luas = 50 x 32 x 10^-3

= 1.6V

Tom qab ntawd lub zog yuav yog

P = V x I

= 1.6 x 32 x 10^-3

= 0.0512 TZS

Nov yog Online Ohms txoj cai laij lej los laij tawm tsam, Voltage, Tam sim no thiab lub zog.

Kuv yuav hloov kho Cov Lus Qhia no nrog ntau tus qauv.

Tawm koj cov lus pom thiab cov lus pom hauv qab no thiab pab kuv ntxiv cov qauv rau cov lus qhia no.