He aha te taraiwa Dimmer LED?

I te mea e hiahiatia ana e ngā rama LED he iahiko tika me te ngaohiko iti hei whakahaere, me whakarite te taraiwa o te rama LED hei whakahaere i te nui o te hiko e uru ana ki te rama LED.
He wāhanga hiko te taraiwa LED e whakahaere ana i te ngaohiko me te iahiko mai i te pūtake hiko kia taea ai e ngā LED te mahi haumaru me te whai hua. Ka hurihia e te taraiwa LED te pūtake iahiko tauutuutu (AC) mai i te pūtake matua ki te iahiko tika (DC) nā te mea ko te nuinga o ngā pūtake hiko e rere ana i runga i te pūtake matua.
Ka taea te whakaiti i te kanapa o te rama LED mā te whakarerekē i te taraiwa rama LED, e whakahaere ana i te nui o te iahiko e uru ana ki te rama LED. Ka whakarerekē tēnei taraiwa rama LED kua whakaritea, e kiia ana i ētahi wā ko te taraiwa whakaiti i te kanapa o te rama LED.
He mea nui kia whakaarohia te ngāwari o te whakamahi i te taraiwa whakamaroke rama LED i te wā e hoko ana i tētahi. Mā te taraiwa whakamaroke rama LED me ngā pana takirua mōkihi raina-rua (DIP) i mua ka māmā ake te whakarerekē i te iahiko putanga mā ngā kaiwhakamahi, ā, ka whakarerekē anō hoki i te kanapa o te rama LED.
Ko te hototahitanga o te taraiwa whakamaroke rama LED me ngā pereti pakitara Triode for Alternating Current (TRIAC) me te pūhiko hiko tētahi atu āhuatanga hei tirotiro. Mā tēnei ka taea e koe te whakahaere i te iahiko hiko tere-teitei e rere ana ki roto i te rama LED, ā, ka mahi tō whakamaroke rama mō tetahi kaupapa kei roto i tō hinengaro.

E rua ngā tikanga, ngā whirihoranga rānei e whakamahia ana e ngā taraiwa whakaiti rama LED hei whakahaere i te iahiko e tomo ana ki te LED: te whakarerekētanga whānui o te kaha me te whakarerekētanga whānui o te pāorooro.

Ko te whāinga o te pulse width modulation, PWM rānei, ko te whakaiti i te nui o te iahiko ārahi e tika ana mā te LED.
Ka tahuri, ka whakaweto, ka whakakā anō te taraiwa i te iahiko i ia wā, i ia wā, hei whakahaere i te nui o te iahiko e hiko ana i te LED, ahakoa kei te pumau tonu te iahiko e uru ana ki te LED. Nā tēnei whakawhitiwhiti poto rawa, ka memeha haere te rama, ka tere rawa te kimo, kāore e kitea, kāore e taea e te tirohanga tangata te kite.

Ko te whakaiti i te nui o te iahiko e uru ana ki te LED e mōhiotia ana ko te amplitude modulation, AM rānei. Ko te hua o te rama dimmer he iti ake te kaha e whakamahia ana. Waihoki, ko te hekenga o te iahiko ka hua ake he iti iho ngā pāmahana me te pikinga o te whai huatanga o te LED. Ka whakakorehia hoki te kanapa mā tēnei rautaki.
Heoi, kia maumahara ko te whakamahi i tēnei tikanga whakaiti i te kanapa ka pā mai pea ētahi mōrearea o te whakarerekētanga o te putanga tae o te LED, inā koa i ngā taumata iti.

Mā te hoko i ngā taraiwa LED ka taea te whakaiti i te kanapa ka taea e koe te whakamahi i ō rama LED. Whakamahia te herekoretanga ki te whakarerekē i ngā taumata kanapa o ō rama LED hei penapena hiko, hei whiwhi hoki i te rama tino whakamarie i roto i tō whare.
Whakapā maiMe hiahia koe ki ētahi rama rīpene LED me te aratau dimmer/dimmer, me ētahi atu taputapu rānei.