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Video: Qhov Tam Sim No LED-Tester: 3 Kauj Ruam
2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:31
Cov Lus Qhia no qhia koj yuav tsim lub ntsuas me me LED los ntawm tsuas yog ob peb ntu. Nws muab qhov yuav luag tas li tam sim no dhau ntawm ntau yam ntawm cov khoom siv hluav taws xob. Nws yog qhov yooj yim heev los ntsuas ntau ntawm LEDs ntawm cov xim sib txawv thiab qhov ntsuas hluav taws xob yam tsis muaj kev phom sij rau LEDs.
Kauj Ruam 1: Txheeb LEDs thiab Xeem
Yog tias koj ua si ib puag ncig nrog LEDs ntau, koj yuav paub qhov teeb meem. Thaum koj muaj txhais tes puv ntawm ultrabright meej LEDs tus thawj tswj hwm txhua yam zoo ib yam. Koj tsis paub tias xim twg nws yog lossis lub teeb nws tso tawm ntau npaum li cas. Koj tuaj yeem siv 3V khawm xov tooj ntawm tes, tab sis rau qee qhov LEDs qhov no tsis tuaj yeem ua tau, zoo li cov plaub fab sib npaug superflux LEDs nrog cov ceg luv. Thiab nws tseem yog kev txheeb xyuas rau polarity. Kuv ib zaug yuav tag nrho pawg ntawm LEDs uas Anode yog ceg luv. Kwv yees ntev npaum li cas nws coj kuv mus nrhiav qhov ntawd!
Kauj ruam 2: Circuit Court
Raws li koj tuaj yeem pom hauv kab duab kab kab txhua yam yog yooj yim heev tab sis muaj txiaj ntsig zoo. Koj xav tau ob lub transistors zoo li BC546 lossis BC547, ob lub resistors (4.7kOhm thiab ncig 39Ohm), lub hwj chim ntsaws thiab qee yam ntawm lub qhov (socket). Yog tias koj xaim ua ke txhua qhov zoo li daim duab qhia, nws yuav tsum muab tam sim no rau koj ib puag ncig 20mA. Nrog tus nqi ntawm tus tiv thaiv thib ob (39Ohm) koj feem ntau tswj hwm qhov tam sim no. Kuv siv 27Ohm resistor, vim nws yog txhua yam kuv muaj, thiab nws muab rau kuv tam sim no ntawm thaj tsam 25mA.
Kauj Ruam 3: Nws Ua Haujlwm Li Cas
Lub voj voog no yooj yim dua los tsim thiab tseem nkag siab hauv txoj cai. Txhawm rau suav qhov tseeb yog qhov ua haujlwm nyuaj dua. Nws ua haujlwm li cas: Qhov ua kom yuam kev ntawm qhov Circuit no yog tias lub hauv paus ntawm T1 txuas nrog lub emitter ntawm T2 thiab lub hauv paus ntawm T2 txuas nrog tus sau ntawm T1. Yog li ob lub transistors sib tw rau tag nrho tam sim no uas ntws los ntawm LED. Lawv tsim qee yam uas hu ua qhov kev tawm tswv yim tsis zoo. Kev nce ntxiv tam sim no los ntawm T2 yuav txhawb nqa lub peev xwm ntawm lub hauv paus ntawm T1, uas tom qab ntawd yuav nce qhov tam sim no los ntawm T1. Nrog qhov tshwm sim no, ib feem ntawm qhov tam sim no yav dhau los mus rau lub hauv paus ntawm T2 yuav tsuas yog ntws ncaj qha los ntawm T1 thiab vim li ntawd T2 yuav raug kaw me ntsis ntxiv thiab txo qhov tam sim no los ntawm nws (thiab LED). Nws tsis yog kev tswj hwm zoo meej vim tias rau qhov nce cov tswv yim-qhov hluav taws xob tam sim no kuj nce zuj zus, tab sis tsis dhau dhau. Kev qhia tias nws ua haujlwm Kuv tau sim ob peb LEDs nrog nws. Muaj kev lom zem thiab ua lub tsev!
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