Kodi mungawonjezere bwanji kuwala kwa nyali za LED?

LED (Light Emitting Diode) ndi gwero lowunikira wamba lomwe lili ndi zabwino zambiri, kudalirika komanso moyo wautali. M'mapulogalamu ambiri, nthawi zambiri timafunikira kuwongolera kuwala kwa ma LED malinga ndi zosowa. Nkhaniyi ifotokoza njira zofananira zowongolera kuwala kwa LED ndi mfundo zake.

1. Sinthani magetsi

Kusintha kwamakono ndi imodzi mwa njira zosavuta zosinthira kuwala kwa LED posintha momwe magetsi akuyendera. Kuwala kokulirapo kumapangitsa kuti kuwala kwa LED kukhale kowala, pomwe kung'ono pang'ono kumapangitsa kuti ikhale yocheperako. Njirayi imagwira ntchito pamabwalo osavuta a LED ndipo imatha kukhazikitsidwa posintha gwero, resistor, kapena driver wapano.

2. Pulse wide modulation (PWM)

Pulse wide modulation (PWM) ndiukadaulo womwe umagwiritsidwa ntchito kwambiri pakuwongolera kuwala kwa LED. PWM imawongolera kuwala posintha makulidwe a pulse ndi ma frequency a LED. Mfundo yake ndikusintha chiŵerengero cha nthawi ya mlingo wapamwamba ndi mlingo wochepa wa kugunda kwamtundu uliwonse, potero kuyerekezera zotsatira za kuwala kosiyana. Poyerekeza ndi kusintha kwamakono, PWM imatha kukwaniritsa kusintha kowala kwambiri komanso kugwiritsa ntchito mphamvu zochepa.

3. Gwiritsani ntchito choletsa chosinthika

Chopinga chosinthika (monga potentiometer) ndi chinthu chodziwika bwino chomwe chimagwiritsidwa ntchito kuwongolera kuwala kwa LED. Mwa kulumikiza kutsutsa kosinthika ku dera la LED, kuwala kungathe kuwongoleredwa mwa kusintha kayendedwe kameneka mwa kusintha kukana kwa resistor. Kusintha kukana kwa chotsutsa kumatha kusintha kuwala kwa LED mwachidziwitso, koma kusintha kwake kungakhale kochepa.

4. Gwiritsani ntchito gwero lokhazikika

Constant current source circuit ndi njira yodziwika bwino yoyendetsera LED, yomwe imasintha kuwala posintha magwero apano. Gwero lomwe lilipo nthawi zonse limatha kupereka mphamvu yokhazikika kuti isunge kuwala kwa LED. Njirayi ndi yoyenera kwa mapulogalamu omwe amafunikira kuwongolera bwino kwa kuwala kwa LED ndipo amafuna kukhazikika.

5. Gwiritsani ntchito chipangizo chowongolera kuwala

Ma tchipisi ena oyendetsa ma LED ali ndi ntchito yowongolera kuwala yomwe imatha kusintha kuwala kudzera pazizindikiro zakunja (monga kulowetsa kwa PWM). Tchipisi izi zimaphatikiza mabwalo osinthira kuwala kuti akwaniritse kuwongolera koyenera. Kugwiritsa ntchito chip ichi kumathandizira kamangidwe ka dera komanso kumapereka njira zowongolera zosinthika.

Kuphatikiza apo, pali njira zambiri zowongolera kuwala kwa LED, kuphatikiza kusintha kwamakono, kusinthasintha kwamphamvu kwamphamvu, kugwiritsa ntchito ma resistor osiyanasiyana, magwero apano nthawi zonse komanso tchipisi towongolera kuwala. Njira iliyonse ili ndi zochitika zake ndi mfundo zake. Kusankha njira yoyenera malinga ndi zosowa zenizeni kumatha kukwaniritsa kuwongolera kwa LED komwe kumakwaniritsa zofunikira zowala.