LEDs piv tau qhov zoo ntawm lub qhov muag teev uas zoo tib yam hauv kev ua tau zoo thiab lub kav ntev, siab luminosity thiab tsis muaj cua sov. Tawm hauv qhov ntev ntawm ib hmo yuav tsis ntws cov roj teeb. Ua tsaug rau txhua yam zoo ntawm no, ntau tus tswv tsheb xav hloov lawv cov teeb liab incandescent nrog LEDs.
Tsim nyog
- - LED lossis ntau LED;
- - resistor ntawm tsis tu ncua los kuj tsis paub meej kuj;
- - dviver LM317;
- - multimeter
Cov Lus Qhia
Kauj ruam 1
Ua ntej tshaj plaws, txhuam hauv kev ua haujlwm kom zoo thiab zoo nkauj. Cov kev ua txhaum cai no tuaj yeem ua rau lub tsheb cov khoom siv hluav taws xob puas. Nco ntsoov cov yam ntxwv tseem ceeb ntawm LEDs: qhov ntsuas hluav taws xob ntawm daj thiab xim liab feem ntau yog 2-2.5 V, xiav, ntsuab thiab dawb - 3-3.8 V. Qhov tam sim no ntawm cov khoom siv hluav taws xob tsawg tsawg yog 20 mA, ib qho muaj zog yog 350 mA.
Kauj ruam 2
Nco ntsoov cov yam ntxwv ntawm LEDs: lub peev xwm los ua kom pom qhov chaw nyob ib puag ncig koj yog nyob ntawm seb hom lub teeb nruab nrab, uas tuaj yeem muab nqaim lossis dav ntawm lub teeb. Qhov ntxiv ntawm ib tus LED hu ua qhov anode, thiab qhov rho tawm hu ua cathode. Muab piv rau qhov hluav taws xob ntawm lub tsheb ntawm on-board network thiab qhov hluav taws xob ntawm LED, nco ntsoov tias yooj yim ntsaws nws rau hauv on-board network tuaj yeem hlawv lub caij.
Kauj ruam 3
Txhawm rau txuas cov LEDs, sib sau ua pawg yooj yim pawg ntawm ntau cov ntsiab lus thiab cov resistor. Txhawm rau ua qhov no, suav cov yuav tsum tau ntawm LED los ntawm kev faib tawm qhov voltage ntawm lub network on-board (12-14 V) los ntawm qhov ntsuas ntawm ib qho. Txuas tus nqi yuav tsum tau ua ke ua ntu zus, i.e. txuas cov sib ntxiv ntawm ib qho nrog kev rho tawm ntawm lwm qhov, thiab yog li ntawd mus rau qhov kawg ntawm cov saw.
Kauj ruam 4
Txuas cov seem ob kawg kom txuas rau on-board network los ntawm lub resistor uas suppresses dhau voltage (100-150 Ohm; 0.5 W). Xws li pawg yuav muaj qhov tsis zoo: qhov kev ci ntsa iab yuav hloov nyob ntawm lub cav nrawm.
Kauj ruam 5
Siv tus qauv no, txuas rau txhua tus lej ntawm LED, sau lawv hauv pawg (feem ntau 3 pcs.) Nrog lub thev naus laus zis thiab txuas rau hauv kev sib luag. Hauv qhov no, tseem txuas cov pawg hauv ib txoj kev sib txig (ntxiv rau thiab rho tawm). Txhawm rau kwv yees tus nqi ntawm lub resistor, siv txoj cai: 1 LED xav tau 500 Ohm resistor, ob - 300 Ohm, peb - 150 Ohm.
Kauj Ruam 6
Xam tus nqi resistor zoo dua siv Ohm Txoj Cai. Txhawm rau ua qhov no, faib cov hluav taws xob yuav tsum tau tua ntawm qhov tam sim no kom tau txais. Ntsuas qhov voltage ncaj qha ntawm taw tes ntawm qhov chaw uas koj yuav txuas lub caij nrog multimeter. Rho qhov hluav taws xob LED lossis cov hluav taws xob summed ntawm ntau lub diodes los ntawm tus nqi no. Tau txais qhov loj ntawm qhov hluav taws xob kom tau them rov. Faib nws los ntawm lub hwj chim ntawm diode hauv amperes. Nco ntsoov hloov cov milliamps, uas sawv cev tam sim no ntawm tes, rau amperes.
Kauj Ruam 7
Txheeb xyuas, ntsuas lub amperage ntawm lub resistor thiab diode. Hauv qhov no, coj mus rau hauv tus account kis nyob rau hauv qhov tsis dhau ntawm lub resistor thiab diode, vim tias lub zog tam sim no tuaj yeem sib txawv li 5 mA hauv ib qho kev taw qhia. Yog tias tus nqi tau txais yog siab dua qhov tau suav nrog, lub LED yuav ci dua, tab sis nws lub neej kev pabcuam yuav raug txo kom tsawg. Siv lub tshuab ntsuas hluav taws xob kho kom kho qhov xav tau tam sim no.
Kauj ruam 8
Ntxiv qhov ntsuas hluav taws xob rau hauv Circuit Court. Qhov no yuav tso cai rau LED lossis pawg rau ci ntawm qhov ci ci ywj pheej ntawm lub cav. Qhov yooj yim tshaj plaws thiab txhim khu kev ntseeg siab tshaj plaws yog Circuit Court raws li LM317 microcircuit. Yuav ib qho hauv ib lub khw muag khoom thiab txuas nws nrog ib kawg kom xaus rau ib qho LED lossis pawg, thiab ib qho ntxiv rau hauv on-board network. Txuas lub resistor nrog ib tus coj mus rau hauv nruab nrab ntawm LM317, lwm tus txuas mus rau cov pawg (LED). Thaum txhim kho, txuas LM317 microcircuit tsuas yog rau tus insulating gasket.
