Yuav ua li cas kom zoo dua qhov ci ntawm LED teeb?

LED (Lub Teeb Emitting Diode) yog lub teeb pom kev zoo nrog qhov zoo ntawm kev ua haujlwm siab, kev ntseeg siab thiab lub neej ntev. Hauv ntau daim ntawv thov, peb feem ntau yuav tsum tau tswj qhov ci ntawm LEDs raws li kev xav tau. Tsab ntawv xov xwm no yuav qhia txog qee qhov kev tswj hwm kev ci ntsa iab LED thiab lawv cov hauv paus ntsiab lus.

1. Kho qhov tam sim no

Kev kho tam sim no yog ib txoj hauv kev yooj yim tshaj plaws los hloov qhov ci ntawm LED los ntawm kev hloov tam sim no los ntawm nws. Ib qho tam sim no loj dua yuav ua rau LED ci dua, thaum me me tam sim no yuav ua rau nws dimmer. Txoj kev no ua haujlwm rau cov kab hluav taws xob LED yooj yim thiab tuaj yeem siv tau los ntawm kev kho qhov chaw tam sim no, resistor, lossis tsav tam sim no.

2. Pulse width modulation (PWM)

Pulse width modulation (PWM) yog cov cuab yeej siv dav hauv LED teeb pom kev zoo. PWM tswj kev ci ntsa iab los ntawm kev kho cov mem tes dav thiab zaus ntawm LEDs. Nws lub hauv paus ntsiab lus yog hloov lub sijhawm piv ntawm qib siab thiab qib qis ntawm cov mem tes hauv txhua lub voj voog, yog li simulating cov nyhuv ntawm qhov sib txawv brightness. Piv nrog rau kev hloov kho tam sim no, PWM tuaj yeem ua tiav qhov kev hloov kho qhov kaj siab dua thiab qis dua kev siv hluav taws xob.

3. Siv lub zog hloov pauv

Ib qho kev sib txawv ntawm cov resistor (xws li potentiometer) yog ib qho khoom siv los tswj LED qhov ci. Los ntawm kev sib txuas ib qho kev hloov pauv mus rau LED Circuit Court, qhov ci tuaj yeem tswj tau los ntawm kev hloov pauv tam sim no los ntawm kev kho qhov tsis kam ntawm resistor. Kho qhov tsis kam ntawm cov resistor tuaj yeem kho qhov ci ntawm LED qhov kev xav tau zoo heev, tab sis nws qhov kev hloov kho yuav raug txwv.

4. Siv qhov chaw tam sim no

Qhov chaw tam sim no tsis tu ncua yog ib txoj hauv kev ntawm kev tsav tsheb LED, uas hloov qhov ci ntsa iab los ntawm kev kho qhov tam sim no ntawm qhov chaw tam sim no. Qhov chaw tam sim no tsis tu ncua tuaj yeem muab qhov tam sim no ruaj khov kom tswj tau qhov ci ntsa iab ntawm LED. Txoj kev no yog tsim rau cov ntawv thov uas xav tau kev tswj xyuas meej ntawm LED ci ntsa iab thiab xav tau kev ruaj ntseg.

5. Siv lub ci ci tswj nti

Qee qhov tshwj xeeb LED tsav chips muaj lub ci ci tswj kev ua haujlwm uas tuaj yeem kho qhov ci ci los ntawm kev tswj hwm sab nraud (xws li PWM cov tswv yim). Cov chips no ua ke nrog kev hloov kho qhov ci ci kom ua tiav kev tswj qhov ci ntsa iab. Siv cov nti no yooj yim tsim Circuit Court thiab muab kev tswj tau yooj yim dua.

Txhawm rau ua kom tiav, muaj ntau txoj hauv kev los tswj LED qhov ci, suav nrog kev hloov kho tam sim no, pulse width modulation, siv cov hloov pauv hloov pauv, qhov chaw tsis tu ncua tam sim no thiab cov chips tswj kev ci ntsa iab. Txhua txoj kev muaj nws cov xwm txheej thiab cov ntsiab cai. Xaiv txoj kev tsim nyog raws li cov kev xav tau tshwj xeeb tuaj yeem ua tiav LED tswj uas ua tau raws li qhov yuav tsum tau ua kom ci.