2024 Tus sau: Malcolm Clapton | [email protected]. Kawg hloov kho: 2023-12-17 03:58
Ntawm nplooj ntawv ntawm Lifehacker, lawv tau sau txog ntau yam khoom siv. Tab sis hnub no peb yuav xav txog ib lub gadget uas tsis zoo li txhua yam los ntawm yav dhau los tshuaj xyuas los ntawm peb thiab tuaj yeem yog qhov khoom plig zoo tshaj plaws rau Lub Ob Hlis 23rd.
Txiv neej nyiam gadgets. Cov txiv neej nyiam ua tej yam nrog lawv tus kheej tes. Thiab nyob rau hauv lub ntiaj teb niaj hnub ntawm electronics, ib tug tsis tuaj yeem ua yam tsis muaj kev ntsuas ntsuas. Es tsis txhob yuav ib pawg ntawm cov khoom sib cais, nws yog qhov zoo dua kom tau txais ib qho multimeter - ib qho cuab yeej uas sib txuas nrog ammeter, voltmeter thiab ohmmeter. Xws li ib qho xav tau ob qho tib si thaum poking nyob rau hauv cov khoom siv hluav taws xob, thiab thaum tsim koj tus kheej li. Qee lub sij hawm nws tuaj yeem muaj txiaj ntsig zoo hauv kev kho thiab daws teeb meem ntawm lub tsheb xaim. Multimeter yog ib qho khoom plig zoo heev. Txawm hais tias ib tug neeg twb muaj cov khoom siv zoo sib xws, ib qho tshiab yuav tsis yog superfluous, thiab ib qho uas yuav tau tham hauv peb qhov kev tshuaj xyuas tsis yog rau txhua tus.
Tsis ntev dhau los kuv tau txhawj xeeb txog cov lus nug ntawm qhov twg multimeter yuav. Muaj ntau yam khoom siv hauv kev ua lag luam xws li $ 5 txog $ 800 nrog ntau yam kev ua haujlwm. Txij li thaum lub multimeter tau muas rau ntau yam kev ua haujlwm, kuv xav kom tau txais qhov siab tshaj plaws ntawm kev ua haujlwm rau qhov nyiaj tsawg tshaj plaws. Thiab qhov yooj yim, qhov tseeb ntawm kev nyeem ntawv thiab kev ntsuas ceev tsis yog qhov tseem ceeb.
Raws li tag nrho cov kev cai no, ib tug multimeter tau yuav, uas tiag tiag hloov mus rau qhov zoo tshaj plaws peev nyiaj ntsuas ntsuas ntawm lub khw. Nws tau muab nrog cov khoom zoo zoo thiab cov thermocouple thiab npaj siv tam sim ntawd. Cov ntaub ntawv ntawm multimeter yog tiv thaiv los ntawm ib qho yooj yim silicone rooj nrog grooves rau probes - yuav tsis muaj teeb meem ntawm lub rooj.
Lub ntsiab kom zoo dua ntawm Vichy VC99 tuaj yeem hu ua ntau yam haujlwm: qhov no yog qhov ntsuas tam sim no thiab qhov hluav taws xob, AC thiab DC tam sim no, tsis kam, capacitance, kub, zaus (thiab qhov no tsis tshua muaj peev xwm ntsuas qhov ntsuas kub). Tsis tas li ntawd, lub gadget tuaj yeem kuaj xyuas cov transistors, muaj kev hu xov tooj. Qhov tseeb, ntau tus neeg ntsuas no tuaj yeem ntsuas txhua yam uas yuav tsum tau muaj nyob rau hauv cov xwm txheej hauv tsev. Koj tuaj yeem nkag mus nrog nws ob qho tib si rau hauv lub xov tooj smartphone lossis tus neeg ua si, thiab hauv tsev network rau 220-380 V lossis rau hauv cov khoom siv hauv tsev uas siv los ntawm lub network. Muaj kev tiv thaiv, yog li nws yuav tsis hlawv (tsim ib zaug, tab sis kuv tsis qhia koj feem ntau provoke).
Tag nrho cov ntaub ntawv yog tso tawm nyob rau hauv ib tug yooj yim zaub, thiab nyob rau hauv ob daim ntawv: digital thiab analog. Kev nyeem ntawv tuaj yeem kho tau, thiab thaum ntsuas qhov sib txawv, koj tuaj yeem siv Max / Min nyees khawm thiab pom qhov tsawg kawg nkaus thiab qhov siab tshaj plaws hauv qhov ntsuas. Tsis muaj teeb pom kev zoo, tab sis yog tias koj xav tau, koj tuaj yeem hloov kho lub cuab yeej hauv ob peb feeb (thiab txuag nyiaj, vim tias qhov ze tshaj plaws counterparts nrog backlight yog kim dua).
| Muaj nuj nqi ntxiv | Cov lus (1) |
| Diode xeem | Yog lawm |
| Tshawb xyuas cov transistors | Yog lawm |
| Tshawb xyuas qhov tsis muaj qhov qhib hauv hluav taws xob | Tsawg dua 30 Ω ± 10 Ω |
| Tsawg roj teeb qhia | Thaum qhov hluav taws xob poob rau 2.4 V |
| Kev nyeem ntawv khov rau ntawm qhov screen | Yog lawm |
| Nws pib fais fab tuag | Tom qab li 15 feeb |
| Analogue nyeem kab | Yog lawm |
| Kev tiv thaiv | Yog lawm |
| Input impedance | 10 hmo |
| Kev ntsuas zaus | Peb zaug ib ob |
| Txhawb zaus ntawm AC ntsuas tam sim no | 40-400 Hz |
| Zaub muaj peev xwm | 6 000 |
| Zaub loj | 65 × 41 hli |
| Roj teeb | 3V, AAA × 2 |
Cov kev nyeem ntawv ntawm cov zaub tsis tshwm sim tam sim ntawd, lub cuab yeej xav tau li 3-5 vib nas this rau kev sau npe zaum kawg (koj tuaj yeem qhib, solder ob peb ntu, thiab kev xav yuav dhau mus). Tab sis qhov kev ntsuas yuam kev sib raug rau cov uas tau tshaj tawm.
| Lub luag haujlwm tseem ceeb | Kev ntsuas ntau | Qhov tseeb ntawm kev ntsuas |
| Tsis tu ncua tam sim no, voltage | 600mV / 6V / 60V / 600V / 1000V | ± (0, 5% + 4) |
| Hloov tam sim no, voltage | 6V / 60V / 600V / 1000V | ± (0, 8% + 6) |
| Tsis tu ncua tam sim no, lub zog tam sim no | 600 μA / 6000 μA / 60 mA / 600 mA / 6 A / 20 A | ± (0, 8% + 3) |
| Hloov tam sim no, tam sim no | 600 μA / 6000 mA / 60 mA / 600 mA / 6 A / 20 A | ± (1, 5% + 10) |
| Kev tiv thaiv | 600 Ohm / 6 kOhm / 60 kOhm / 600 kOhm / 6 MOhm / 60 MOhm | ± (0, 8% + 5) |
| Muaj peev xwm | 40 pF / 400 pF / 4 μF / 40 μF / 400 μF / 2000 μF | ± (3, 5% + 8) |
| Ntau zaus | 100 Hz / 1 kHz / 10 kHz / 100 kHz / 1 MHz / 60 MHz | ± (0, 5% + 4) |
| Kub | -40 ° C ~ 1,000 ° C | ± (0, 75% + 3) |
| 0 ° F ~ 1,832 ° F | ± (1, 2% + 3) |
Qhov sib npaug ntawm qhov kev nyeem ntawm cov zaub (ntau ntau) yog rau. Hloov ntawm qhov ntsuas qhov ntsuas yog tsis siv neeg, muaj kev tiv thaiv, yog li lub cuab yeej yuav tsis hlawv yog tias qhov ntau yam raug xaiv yuam kev.
Ntawm qhov tsis txaus, nws tsim nyog sau cia qhov tsis yooj yim ntawm kev ntsuas lub zog tam sim no: muaj 200 mA hom thiab tam sim ntawd 200 A, uas yog vim li cas qhov ntau ntawm 10-99 A tshwm sim tom qab tus lej lej. Tsis tas li ntawd, cov cuab yeej muaj qhov yuam kev siab thaum ntsuas cov zaus siab tshaj 40 MHz. Txawm li cas los xij, qhov no tsis yog qhov tseem ceeb, tshwj xeeb tshaj yog nrog tus nqi zoo sib xws. Kev txiav txim siab los ntawm kev txheeb xyuas hauv Is Taws Nem, tsis muaj qhov xwm txheej ntawm kev muag cov khoom siv tsis sib xws ntawm hom no thiab muaj peev xwm hloov kho.
Qhov ze tshaj analogs ntawm Vichy VC99 yog ntau yam khoom siv los ntawm Mastech. Txawm li cas los xij, lub transistor tsis tuaj yeem nplhaib, nws tsis muaj ib qho analog bar, nws tsis tuaj yeem ntsuas oscillations. Nws tuaj yeem yog ib qho kev xaiv, tab sis cov cuab yeej no yog $ 20-30 kim dua, thaum nws muaj backlighting "tawm ntawm lub thawv", thiab tseem muaj nruab nrog lub suab ntsuas ntsuas thiab luxmeter (rau ntsuas qhov teeb pom kev zoo). Yog li, Vichy VC99 yog qhov sib npaug tshaj plaws thiab "khoom" tester hauv qab $ 50.
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