- Los ntawm Kev Ntsuas Voltage
Thawj qhov kom paub meej yog seb qhov voltage ntawm txhua lub zog hluav taws xob tus pin yog qhov qub lossis tsis, tom qab ntawd xyuas seb qhov sib txawv siv hluav taws xob zoo li cas lossis tsis, ntxiv rau qhov taw tes ntawm qhov ua haujlwm voltage. Piv txwv li, ib tug raug silicon triode muaj ib tug BE hlws ris voltage ntawm txog 0.7V, thiab ib tug CE hlws ris voltage ntawm txog 0.3V los yog tsawg.Yog hais tias lub BE junction voltage ntawm ib tug transistor yog ntau tshaj 0.7V (tshwj tsis yog rau tshwj xeeb transistors, xws li darlington raj, thiab lwm yam), BE junction yuav qhib.
2. kev txhaj tshuaj
Yuav teeb liab rau cov tswv yim, thiab tom qab ntawd tig rov qab los ntsuas qhov waveform ntawm txhua qhov taw tes, saib seb qhov qub, txhawm rau nrhiav qhov txhaum peb qee zaum siv txoj hauv kev yooj yim dua, nrog rau lub zog ntawm tes, piv txwv li, kov ntawm txhua qib. cov tswv yim, cov lus tso tawm sab nraud, lub amplifying Circuit Court xws li suab video feem ntau siv (tab sis nco ntsoov tias cov phaj kub lossis hluav taws xob hluav taws xob siab, tsis tuaj yeem siv txoj kev no, txwv tsis pub nws yuav ua rau hluav taws xob poob siab) yog kov ua ntej qib tsis teb, thiab kov tom qab qib 1, ces qhov teeb meem nyob rau hauv thawj theem, yuav tsum tsom rau kev soj ntsuam
Lwm txoj hauv kev los nrhiav PCB tsis raug
Muaj ntau txoj hauv kev los nrhiav qhov teeb meem, xws li pom, hnov, hnov, kov, thiab lwm yam.
1 "Saib" txhais tau hais tias saib seb cov khoom puas muaj kev puas tsuaj rau lub cev, xws li rupture, blackening, deformation, thiab lwm yam;
2 "Mloog" yog mloog seb lub suab ua haujlwm zoo li cas, xws li qee qhov yuav tsum tsis txhob hnov txog yam hauv lub nplhaib, lub suab ntawm qhov chaw tsis yog suab lossis suab txawv txav, thiab lwm yam.;
3 "Smell" yog los xyuas cov ntxhiab tsw, xws li kub hnyiab tsw, tsis hnov tsw ntawm capacitor electrolyte, thiab lwm yam, rau cov neeg ua haujlwm paub txog hluav taws xob tu, uas yog rhiab heev rau cov ntxhiab tsw;
4.To "kov" txhais tau tias ntsuas qhov ntsuas kub ntawm lub cuab yeej ntawm tes kom pom tias nws zoo li qub, xws li kub dhau lossis txias dhau.
Qee cov khoom siv hluav taws xob, yog tias lawv yuav kub thaum ua haujlwm, yog tias ib qho kov uas txias, nws tuaj yeem txiav txim siab tias nws tsis ua haujlwm. Tab sis yog tias nws kub heev qhov twg nws yuav tsum tsis txhob los yog kub heev qhov twg nws yuav tsum, qhov ntawd yuav tsis ua hauj lwm. General fais fab transistor, voltage regulator nti, thiab lwm yam., ua hauj lwm ntawm 70 degrees hauv qab no yog kiag li tsis muaj teeb meem. 70 degree zoo li cas? Yog tias koj nias koj txhais tes rau ntawm nws, koj tuaj yeem tuav nws ntev tshaj li peb vib nas this, uas txhais tau hais tias qhov ntsuas kub qis dua 70 degrees.