Taw qhia rau Kev Ntsuas Lub Teeb-Emitting Diodes (LEDs) nrog Multimeter
Lub rau pem hauv ntej voltage poob ntawm lub teeb infrared-emitting diodes feem ntau yog 1.3-2.5V, thiab rau pem hauv ntej thiab rov qab tsis kam ntawm lub teeb infrared-emitting diodes tuaj yeem ntsuas tau siv lub pointer multimeter nrog R × 10k teeb tsa. Nquag, tus nqi tiv thaiv pem hauv ntej yog li 15 ~ 40k Ω (tus nqi me dua, qhov zoo dua); Qhov rov qab tsis kam yog ntau dua 500k Ω. Yog hais tias ob qho tib si rau pem hauv ntej thiab thim rov qab qhov tseem ceeb tau ntsuas kom ze rau xoom, nws qhia tau hais tias lub teeb ci infrared-emitting diode tau raug puas ntsoog thiab puas. Yog hais tias ob qho tib si rau pem hauv ntej thiab rov qab qhov tseem ceeb kuj ntsuas yog infinite, nws qhia tau hais tias lub diode tau qhib thiab puas. Yog tias qhov ntsuas rov qab ntsuas tus nqi qis dua 500k Ω, nws qhia tau hais tias lub diode tau raug puas tsuaj vim qhov xau.
Vim lub teeb infrared tawm los ntawm lub teeb infrared-emitting diodes, nws tsis pom rau tib neeg lub qhov muag. Ntxiv nrog rau kev siv cov txheej txheem saum toj no los txiav txim siab qhov zoo ntawm PN kev sib tshuam, cov cuab yeej siv hluav taws xob (xws li 2CR lossis 2DR silicon photovoltaic cell) tuaj yeem npaj ua tus txais, thiab lub tshuab multimeter tuaj yeem siv los ntsuas qhov hloov pauv ntawm ob qho kawg ntawm lub cell photovoltaic. Txhawm rau txiav txim siab seb lub teeb infrared-emitting diode emits lub teeb infrared thaum raug rau qhov tsim nyog rau pem hauv ntej tam sim no.
Txoj kev tshuaj ntsuam pom pom los txiav txim qhov zoo thiab qhov tsis zoo ntawm lub teeb ci -emitting diodes (muaj feem xyuam rau lub teeb infrared-emitting diodes thiab lub teeb zoo tib yam-emitting diodes ntim rau hauv pob tshab resin)
LEDs muaj ob tus pins, feem ntau tus pin ntev yog tus ncej zoo thiab tus pin luv yog tus ncej tsis zoo. Lub teeb infrared-emitting diodes thiab pob tshab ntim lub teeb zoo tib yam-emitting diodes muaj qhov pom tseeb thiab pom cov electrodes hauv lawv lub plhaub. Qhov dav thiab loj dua electrode sab hauv yog qhov tsis zoo electrode, thaum lub nqaim thiab me electrode yog qhov zoo electrode.
