LED configurations

Qhov taw qhia teeb LEDs tuaj yeem muaj ntau yam kev teeb tsa. Cov no muab ntau qhov kev hloov pauv yooj yim thaum tsim circuits:

Ob-xim LEDs:

LEDs tsis tiv taus qhov tseem ceeb rov qab voltages. Txawm hais tias lub diodes nyob rau hauv qhov kev teeb tsa no yuav muaj kev cuam tshuam rov qab, qhov no tsuas yog txwv rau lub zog pem hauv ntej ntawm lwm lub diode, thiab qhov no tsis txaus los ua kev puas tsuaj rau qhov rov qab biased diode.
Tri-xim LEDs: This LED configuration again uses two separate LEDs, but in a different configuration. Each LED has a different colour. There are two anode connections and a single cathode. It is therefore possible to turn each LED on separately, giving a choice of two colours - the third is provided by turning both LEDs on together and giving a third colour by addition. It is also possible to have different intensities of both LEDs to further vary the colour.
Daim ntawv no ntawm LED yog qhov yooj yim rau kev siv. Lub pob muaj tsis yog lub LED nkaus xwb tab sis kuj yog ib qho yooj yim IC uas muab lub sijhawm ua haujlwm los pab kom lub teeb nyem.

Tej pob khoom LED

Cov tsoos LED tau muaj txij li thaum xyoo 1960s thiab tau tsim muaj ntau ntau lab lab.

LEDs muaj nyob rau hauv ntau qhov ntau thiab tsawg pob. Tej zaum qhov siv dav tshaj plaws yog 5 hli txoj kab uas hla, txawm hais tias muaj lwm tus tswv tsev muaj xws li 1.8mm, 3mm, 4mm, 8mm, thiab 20mm. Kuj tseem muaj thiab cov duab plaub muaj LEDs - yuav luag txhua qhov loj los ua kom muaj ntau yam kev xav tau.

LED kev sib txuas

Zoo li txhua lub diode LEDs yuav tsum tau muab tso rau hauv ib lub voj voog nrog kev taw qhia kom raug. Txhawm rau ua haujlwm, lub LED yuav tsum muaj cov dej ntws los ntawm nws, thiab qhov no tsuas yog tshwm sim yog tias nws mus rau pem hauv ntej tsis ncaj ncees lawm. Nyob rau hauv qhov kev taw qhia rov qab tsis muaj tam sim no yuav ntws. Tsis tas li ntawd yog tias LED muaj qhov hluav taws xob rov qab siab tso thoob plaws nws, ces nws tuaj yeem tshuab tau yooj yim.

Ob qhov kev sib txuas rau LED yog qhia los ntawm a rau lub anode uas zoo ({0}}), thiab K rau cathode uas tsis zoo (-).

Rau qhov taw qhia me me LED teeb uas feem ntau siv rau hauv cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob cov khoom siv hluav taws xob cathode (k) feem ntau muaj cov hlau lead luv dua thiab tej zaum yuav muaj me ntsis tiaj tus ntawm lub cev ntawm cylindrical LEDs. Qee lub sij hawm nws tuaj yeem pom hauv LED thiab dua lub cathode ib txwm muaj cov electrode loj dua.

Yog tias lub LED muaj ob txoj hlua nrog cov hlau lead uas muaj qhov sib npaug ntawm qhov ntev, ces nws tuaj yeem saib hauv lub pob LED thiab ib txwm pom ob daim hlau me me tuaj yeem pom. Lub phaj me me qhia qhov zoo (anode) txhuas; lub phaj loj belongs rau qhov tsis zoo (cathode) txhuas. Hmoov tsis zoo, txoj kev no tsis yog kev ntseeg siab tag nrho vim qee qhov loj LEDs muaj cov phiaj rov qab yog li qhov no tsis yog 100% kev ntseeg tau.

Lwm qhov taw qhia tuaj yeem yog lub tiaj tus muab tso rau hauv cov yas encapsulation rau LED - cov hlau lead uas nyob ib sab ntawm lub tiaj tus feem ntau yog cov cathode ntawm kev sib txuas tsis zoo.

Nto mount diodes yog qhov nyuaj dua los txiav txim qhov polarity. Yog hais tias daim ntawv-daim ntawv yog muab rau tes ces qhov no yog qhov zoo tshaj plaws mus kom ze. Tsis tas li ob peb SMD LEDs muaj lub cim tsis zoo"-" ntawm pob los qhia qhov polarity, tab sis qhov no tsis yog ib txwm muaj thiab feem ntau nyuaj rau pom.

Nto Mount, SMT LED pob

Zoo li txhua yam khoom, LEDs tau siv ntau ntau hauv LED SMT pob. Lawv muaj nyob rau hauv cov txheej txheem kev lag luam pob khoom. Txawm li cas los xij lawv tsis tau raug rau tib theem ntawm miniaturization ntau yam xws li cov resistors thiab capacitors uas muaj nyob rau hauv 0201, thiab lwm yam. Qhov no yog ib feem vim lawv yuav tsum muaj qee qhov me me kom pom!