Cov neeg tiv taus yog cov khoom siv ntau hauv cov hluav taws xob hluav taws xob ntawm txhua yam. Lawv lub luag haujlwm yog txhawm rau tiv thaiv qhov tam sim no ntws hauv Circuit Court, thiab kev tiv thaiv ntau npaum li cas lawv muab ntsuas hauv ohms. Feem ntau tau luam tawm nrog ib tus lej xim lossis tus lej lej lej los qhia lawv cov txiaj ntsig ohmic thiab kev ua siab ntev - ntau npaum li cas lawv qhov kev tiv thaiv yuav txawv. Kev kawm cov lej, nrog rau kev siv lub cuab yeej mnemonic muaj txiaj ntsig, yuav tso cai rau koj txheeb xyuas cov neeg tawm tsam yooj yim.
Cov kauj ruam
Txoj Kev 1 ntawm 2: Xim Coded Resistors (Axial Resistors)
Kauj Ruam 1. Axial resistors yog cylindrical nrog cov coj txuas ntawm txhua qhov kawg
Kauj Ruam 2. Saib cov neeg tawm tsam kom cov pab pawg ntawm 3 lossis 4 pawg xim nyob sab laug
Cov no qee zaum ua raws los ntawm qhov sib txawv, tom qab ntawd ntxiv cov xim band.
Kauj Ruam 3. Nyeem kab xim ntawm sab laug mus rau sab xis
Cov xim ntawm thawj 2 lossis 3 pawg sib raug rau cov lej los ntawm 0 txog 9, uas sawv cev rau tus lej tseem ceeb ntawm tus tiv thaiv tus nqi ohmic. Kawg band muab tus lej. Piv txwv li, tus tiv thaiv nrog cov xim daj, ntsuab thiab ntsuab ntsuab tau ntsuas ntawm 15 mega-ohms (15, 000, 000 ohms). Cov cai yog raws li hauv qab no:
- Dub: 0 tus lej tseem ceeb, sib npaug ntawm 1
- Xim av: 1 tus lej tseem ceeb, sib npaug ntawm 10
- Liab: 2 tus lej tseem ceeb, sib ntxiv ntawm 100
- Txiv kab ntxwv: 3 tus lej tseem ceeb, sib npaug ntawm 1, 000 (kilo)
- Daj: 4 tus lej tseem ceeb, sib npaug ntawm 10,000, (10 kilo)
- Ntsuab: 5 tus lej tseem ceeb, sib npaug ntawm 100, 000 (mega)
- Xiav: 6 tus lej tseem ceeb, sib ntxiv ntawm 1, 000, 000 (10 mega)
- Violet: 7 tus lej tseem ceeb
- Grey: 8 tus lej tseem ceeb
- Dawb: 9 tus lej tseem ceeb
- Kub: sib npaug ntawm 1/10
- Nyiaj: sib npaug ntawm 1/100
Kauj Ruam 4. Nyeem xim ntawm kab xim kawg, uas yog txoj cai nyob deb tshaj
Qhov no sawv cev rau kev ua siab ntev ntawm tus tiv thaiv. Yog tias tsis muaj pawg xim, qhov ua siab ntev yog 20 feem pua. Cov neeg tawm tsam feem ntau tsis muaj cov qhab, cov qhab nyiaj lossis cov qhab kub, tab sis koj yuav pom cov neeg tawm tsam nrog lwm cov xim. Cov xim xim kam rau ua yog raws li hauv qab no:
Kauj Ruam 5. Xim av:
1 feem pua kam rau ua
Kauj Ruam 6. Liab:
2 feem pua kam rau ua
Kauj Ruam 7. Txiv kab ntxwv:
3 feem pua kam rau ua
Kauj Ruam 8. Ntsuab:
0.5 feem pua kam rau ua
Kauj Ruam 9. Xiav:
0.25 feem pua kam rau ua
Kauj Ruam 10. Violet:
0.1 feem pua kam rau ua
Kauj Ruam 11. Grey:
0.05 feem pua kam rau ua
Kauj Ruam 12. Kub:
5 feem pua kam rau ua
Kauj Ruam 13. Nyiaj:
10 feem pua kam rau ua
Kauj Ruam 14. Cim ib lub cim rau cov neeg tawm tsam
Ntau qhov muaj, yog li xaiv qhov uas koj yuav tsis hnov qab. Nco ntsoov tias thawj xim yog xim dub, thiab tom qab ntawv txhua thawj tsab ntawv sib xws rau xim raws li 0 txog 9. Qee cov khoom siv mnemonic nrov suav nrog:
- "Npias tsis zoo ua rau peb lub siab tawv tab sis vodka mus zoo."
- "Cov tub hluas ci rau cov ntxhais hluas tab sis veto tau sib yuav."
Txoj Kev 2 ntawm 2: Alphanumerically Coded Resistors (Surface Mounted Resistors)
Kauj Ruam 1. Cov ntsia hlau tiv thaiv sab saum toj yog cov duab plaub nrog cov coj uas nthuav tawm los ntawm ob sab los yog ib sab ib sab thiab khoov rau hauv qab rau kev teeb tsa ntawm cov laug cam
Qee tus neeg tiv taus muaj daim hlau tiv toj rau hauv qab.
Kauj Ruam 2. Nyeem 3 lossis 4 tus lej ntawm tus tiv thaiv
Thawj 2 lossis 3 tus sawv cev rau tus lej tseem ceeb thiab tus lej kawg qhia tus lej 0s uas yuav tsum ua raws. Piv txwv li, tus nyeem ntawv resistor 1252 qhia qhov ntsuas ntawm 12, 500 ohms lossis 1.25 kilo-ohms.
Kauj Ruam 3. Sib piv tsab ntawv ntawm qhov kawg ntawm txoj cai nrog qhov ua siab ntev nws sawv cev
Kauj Ruam 4. A:
0.05 feem pua kam rau ua
Kauj Ruam 5. B:
0.1 feem pua kam rau ua
Kauj Ruam 6. C:
0.25 feem pua kam rau ua
Kauj Ruam 7. D:
0.5 feem pua kam rau ua
Kauj Ruam 8. F:
1 feem pua kam rau ua
Kauj Ruam 9. G:
2 feem pua kam rau ua
Kauj ruam 10. J:
5 feem pua kam rau ua
Kauj Ruam 11. K:
10 feem pua kam rau ua
Kauj Ruam 12. M:
20 feem pua kam rau ua
Kauj Ruam 13. Txheeb xyuas seb puas muaj tsab ntawv "R" nyob hauv tus lej lej
Qhov no qhia txog tus tiv thaiv me me heev, thiab tsab ntawv siv qhov chaw ntawm cov lej zauv. Piv txwv li, 5R5 resistor tau ntsuas ntawm 5.5 ohms.
