Cov txheej txheem:
- Kauj Ruam 1: Xam Tawm Qhov Voltages ntawm Txhua LED Xim
- Kauj Ruam 2: Xam Tawm Yuav Ua Li Cas Thiaj Li Sib Cais Tawm Txoj hlua
- Kauj Ruam 3: Nws Puas Tsim Nyog Nws?
Video: Txaus Siab Rau Koj Tus Kheej Tsuas Yog Siv 12V-rau-AC-kab Inverter rau LED Lub Teeb Hluav Taws Xob Tsis txhob Rov Ua Rau Lawv rau 12V.: 3 Cov Kauj Ruam
2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:30
Kuv txoj kev npaj tau yooj yim. Kuv xav txiav cov phab ntsa uas siv hluav taws xob LED teeb ua ib daim ces rov txuas nws kom khiav tawm 12 volts. Lwm txoj hauv kev yog siv lub zog hloov pauv, tab sis peb txhua tus paub tias lawv tsis muaj txiaj ntsig zoo, puas yog? Txoj cai? Los yog lawv?
Kauj Ruam 1: Xam Tawm Qhov Voltages ntawm Txhua LED Xim
Kuv tau teeb tsa tag nrho yog li kuv tau teeb tsa los xam seb yuav faib cov hlua li cas. Kuv tau siv lub roj teeb 9V dhau los ntawm 470 ohm resistor rau clip coj (txwv tam sim no tsis pub ntau tshaj 20mA lossis li ntawd). Kuv txiav lub ntsuas hluav taws xob nruab nrab ntawm 9V tsis zoo thiab tus tiv thaiv. Tsis muaj dab tsi inline, nws ib txwm nyeem 9 volts. Tom qab ntawd kuv nthuav tawm ib qho ntawm cov LED thiab muab tso ua ke mus rau lub voltmeter. Kuv tig nws ib ncig kom nws yuav pom kev, thiab tom qab ntawd nyeem lub ntsuas. Thawj qhov yog xiav thiab nws nyeem 3.0 volts - qhov ntawd yog qhov poob qis ntawm LED. Lwm tus yog raws li hauv qab no: Xiav: 3.0VGreen: 3.2VOrange: 2.0VRed: 5.2V *Daj: 2.0V
Nco ntsoov tias liab ua rau kuv xav tsis thoob ntawm 5 volts … Kuv tau cia siab tias zoo li 2 volts
Kauj Ruam 2: Xam Tawm Yuav Ua Li Cas Thiaj Li Sib Cais Tawm Txoj hlua
Txoj hlua kuv muaj 60 LED ntev. Kuv xav kom txo sijhawm kuv tau siv rau txoj haujlwm no yog li kuv xav tias kuv tsuas yog coj lawv mus rau qhov kev txiav txim thiab ntxiv qhov tam sim no txwv kev tawm tsam rau txhua txoj hlua me me uas yuav poob qhov 12-volt input rau txhua yam uas xav tau los ntawm LED's. Thawj txoj hlua muaj ntu uas mus ntsuab, xiav, liab, txiv kab ntxwv, daj. Thiab los ntawm cov kauj ruam kawg, qhov ntsuas hluav taws xob rau txhua LED yog: Xiav: 3.0V Ntsuab: 3.2V Txiv kab ntxwv: 2.0V Liab: 5.2V Daj: 2.0V Yog li tam sim no peb pib ntawm ntsuab (3.2V) thiab ntxiv txiv kab ntxwv (2.0V rau 5.2V tag nrho) tom qab ntawd liab (5.2V rau 11.4V) thiab qhov ntawd yog vim tias ntxiv daj (2.0V) thawb tag nrho rau 13.4V uas yog ntau dua 12V input voltage. Nov yog daim duab qhia tias muaj dab tsi tshwm sim:
Xim Voltage Tag Nrho
Ntsuab 3.2 3.2 Xiav 3 6.2 Liab 5.2 11.4 Txiv kab ntxwv 2 2 Daj 2 4 Ntsuab 3.2 7.2 Xiav 3 10.2 Liab 5.2 5.2 Txiv kab ntxwv 2 7.2 Daj 2 9.2 Qhov no ua haujlwm tau zoo heev vim tias tam sim no ntu tau rov qab los rau ntsuab uas peb tau pib! Tam sim no nws yog teeb meem ntawm kev xam tawm cov resistors. Piv txwv li, hauv thawj txoj hlua, muaj 0.6 ntau qhov hluav taws xob kom mus txog 12V yog li ntawd tus tiv thaiv yuav tsum poob. Siv Ohm txoj cai, uas yog 0.6V / 30mA = 0.6V / 0.03A = 20 ohms. Tus so ntawm cov resistors yog raws li hauv qab no
Qhov Voltage Rau 12V Resistor
G-B-R 11.4V 0.6V 20 ohms O-Y-G-B 10.2V 1.8V 60 ohms R-O-Y 9.2V 2.8V 93 ohms Yog li muaj 60 LED tag nrho thiab peb ntu ntu muaj tag nrho ntawm 10 LED ib qho yog li ntawd yog 6 ntu ntawm ntu. Los yog 18 ntu - txhua qhov uas yuav tsum tau muab muag. Ugh … kuv puas tseem nyob ntawm txoj kev?
Kauj Ruam 3: Nws Puas Tsim Nyog Nws?
Kuv kuj tshwm sim kom muaj 12V inverter hloov mus rau kab-tam sim no. Puas yog qhov ntawd pov tseg lub roj teeb ntau dua li qhov no? Nco qab ntu?:
Qhov Voltage Rau 12V Resistor
G-B-R 11.4V 0.6V 20 ohms O-Y-G-B 10.2V 1.8V 60 ohms R-O-Y 9.2V 2.8V 93 ohms Xav txog qhov tig no: txhua qhov ntawm 18 ntu ntawm LED's yuav siv 30mA ntawm tam sim no rau tag nrho ntawm 540mA lossis 0.54 amps. Nco tseg tseem tias hauv thawj ntu, 11.4V mus rau lub teeb thiab 0.6V kom pov tseg cov cua sov tawm ntawm qhov tawm tsam. Ib zaug ntxiv ntawm 30mA, uas yog 0.342 watts thiab 0.018 watts, feem. Yog tias koj ua lej rau tag nrho txoj hlua, nws yog 5.54 watts ntawm lub teeb thiab 0.936 watts ntawm cua sov rau qhov ua tau zoo ntawm 5.54 / (5.54+0.936) = 86%. Qhov ntawd yog hauv lub tshav pob ntawm qhov pheej yig inverter. Yog li kuv txuas lub inverter thiab pom nws kos 0.380mA ntawm 12.34 volts uas yog 4.69 watts. Tam sim no txoj hlua tau ntsuas tiag tiag ntawm 0.046 amps ntawm 120 volts lossis 5.52 watts, txuas nrog yam tsis muaj qhov txwv loj tiv thaiv raws li qhov kuv pom tau (thiab nws nyob ze rau 30mA Kuv tau suav sau saum toj no). Xijpeem, qhov no ua rau qhov ua tau zoo tiag tiag ntawm inverter (4.69 watts / 5.52 watts) = 85%. Kuv kwv yees kuv tuaj yeem tau txais tag nrho 1 feem pua ntawm qhov ua tau zoo los ntawm kev txuas nrog xaim nws ntawm tes. Thaum kawg, txawm li cas los xij, tej zaum nws tsis tsim nyog nws.
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