Lub teeb hluav taws xob diodes xav tau ntau txoj cai ntawm xaim yuav tsum tau ua raws li kev ua polarity, kev txwv tam sim no, thiab kev tiv thaiv kev tiv thaiv kom zoo. Kev tsis saib xyuas ntawm cov kev cai no ua rau muaj qhov ua ntej, yog tias tsis muaj qhov tsis ua haujlwm ntawm cov cuab yeej.
Cov Lus Qhia
Kauj ruam 1
Nco ntsoov taws rau LEDs hauv kev ncaj polarity xwb. Qee qhov ntawm lawv poob txawm tias qhov ntsuas hluav taws xob me me tsawg hos. Muaj, txawm li cas los xij, xws li cov LEDs uas muaj peev xwm nthuav tawm cov khoom ntawm zener diode thaum hloov hluav taws xob (thov kom tsis txhob tso siab rau cov khoom ntawm tus stabilizer, uas lawv muaj thaum ua ntawv thov rau pem hauv ntej voltage).
Kauj ruam 2
Tsis txhob ntau tshaj tam sim no ntawm LED. Yog tias koj tsis paub nws, siv txoj cai yooj yim: dhau qhov tam sim no tsis pub tshaj 3 mA los ntawm txhua qhov hluav taws xob SMD LED, tsis pub ntau tshaj 10 mA los ntawm cov ntsuas hluav taws xob LED niaj zaus, thiab tsis pub dhau 20 mA los ntawm lub teeb pom kev zoo LED.
Kauj ruam 3
Thaum xam qhov tam sim no txwv tsis pub resistor rau ib qho LED, coj lub voltage poob thoob lub LED rau hauv tus account. Rau qhov infrared LED nws yog 1.4 V, rau liab nws yog 1, 7, rau daj lossis ntsuab nws yog li 2, rau xiav, xiav-ntsuab, violet thiab dawb nws yog li 3, 5. Rho qhov poob ntawm qhov voltage ntawm lub zog muab, thiab koj yuav tau txais qhov voltage poob hla lub resistor nws tus kheej. Ntxiv mus, qhov kev xam ntawm nws cov nqi nyob ntawm qhov xav tau tam sim no los ntawm cov diode, coj los ntawm cov qauv ib txwm ntawm Ohm txoj cai: R = U / Kuv.
Kauj ruam 4
Yog tias ob peb lub LED txuas nrog hauv cov kab, ntxiv cov nqi ntawm cov voltages poob rau lawv ua ke. Txuas hauv series tsuas yog LEDs tsim rau hauv qhov tam sim no, lossis zoo dua qub - feem ntau ntawm tib hom.
Kauj ruam 5
Tsuas yog txuas cov LEDs nrog tib lub teeb hluav taws xob poob hauv ib txhij. Hauv txhua txhua lwm yam teeb meem, tso lub resistor cais rau txhua ntawm LED.
Kauj Ruam 6
Txhawm rau tiv thaiv cov LEDs ntawm voltage surges nyob rau hauv cov circuits, qhov twg ua tau, txuas rau thaum uas tig mus rau txhua qhov ntawm qhov rov qab polarity nrog 6 V zener diode. lub sijhawm, nws yuav tsis dhau, uas txhais tau tias nws yuav tsis cuam tshuam nrog nws cov haujlwm txhua lub sijhawm.
