Lub zoo meej ntse tswj ntawmLED dej nyab teebyuav tsum muaj kev tswj xyuas phau ntawv, kev tswj xyuas ntse, tswj lub teeb, tswj lub sijhawm thiab lub tswb ua haujlwm tsis raug. Thaum lub hnub poob, lubcoj dej nyab teebtuaj yeem qhib tau, thiab lub teeb ntawm 12:00 ib tag hmo tuaj yeem txiav ib nrab; tom qab kaj ntug, lubdej nyab teebtuaj yeem muab tua.
MainLED dej nyab teebdimming tshuab
Thawj txoj kev yog kom paub qhov dimming ntawmsab nraum zoov LED dej nyab teeblos ntawm kev kho cov tsav tam sim no ntawm lubLED dej nyab teeb, vim tias qhov ci ci ntawm LED nti thiab LED tsav tam sim no muaj qhov sib piv ruaj khov.
Qhov thib ob dimming feem ntau hu ua analog dimming hom lossis linear dimming. Qhov kom zoo dua ntawm qhov dimming no yog tias thaum tsav tsheb tam sim no nce lossis txo qis, LED nti yuav raug txo qis, thiab kev tswj xyuas hluav taws xob muaj zog tiv thaiv kev cuam tshuam ntawm overshoot ntawm tsav tam sim no. Qhov tsis zoo yog qhov kev hloov pauv ntawm kev tsav tsheb tam sim no yuav muaj qee yam cuam tshuam rau cov xim kub ntawm LED nti, uas nyob rau hauv lem cuam tshuam cov xim kub ntawm lub teeb.LED dej nyab teeb.
Ib txoj kev thib peb ntawm dimming yog Pulse Light Modulator (PWM) hom. Txoj kev no yog ua kom lub zog tsav tam sim no square los ntawm ib qho kev tswj hwm, qhov dav ntawm pulse dav, thiab hloov lub sij hawm los ntawm kev hloov ntawm lub mem tes dav, uas tuaj yeem hloov pauv cov zis hluav taws xob tib lub sijhawm, kom ua tiav lub hom phiaj ntawm lub zog. txuag. Qhov kev hloov pauv ceev ceev yog feem ntau ntawm 200Hz thiab 10kHz. Vim yog kev txuag ntawm tib neeg lub zeem muag, tib neeg tsis tuaj yeem hnov cov txheej txheem ntawm lub teeb flickering txav. Qhov kom zoo dua ntawm txoj kev no yog qhov kub dissipation ntawm LED tuaj yeem txhim kho. Qhov tsis zoo yog tias qhov overshoot ntawm kev tsav tsheb tam sim no muaj qee yam kev lag luam cuam tshuam rau lub neej ntawm LED nti, ua rau lub neej luv luv.dej nyab.
Cov saum toj no peb dimmer txoj kev yog cais raws li cov zis tswj ntawm tus tsav tam sim no ntawm LED. Kev tswj Circuit Court kuj tseem tuaj yeem muab faib ua analog tswj thiab PWM tswj, thiab tswj Circuit Court ua tiav los ntawm microcontroller.