Yuav ua li cas puas muaj tus xya-ya zaub?

LED (los yog lub teeb emitting diode) yog ib qho kev kho qhov muag diode uas emits teeb lub zog nyob rau hauv daim ntawv ntawm ib tug "photon" thaum nws yog rau pem hauv ntej biased. Nyob rau hauv electronics peb xa mus rau qhov txheej txheem ntawm electroluminescence. Cov xim ntawm pom lub teeb tawm txim liab los ntawm lub LED yog nyob rau hauv ib tug ntau yam ntawm cov kob xiav liab thiab yog txiav txim los ntawm lub spectral wavelength ntawm lub txim liab teeb, uas nyob rau hauv lem yog nyob ntawm ntau yam impurities uas ntxiv rau cov semiconductor khoom thaum lub sij hawm siv thiab ua.

LEDs muaj ntau yam zoo piv rau tsoos qhov muag thiab teeb, thiab, tej zaum tseem ceeb tshaj plaws ntawm lawv yog lawv me me luaj li cas, durability, ib tug ntau yam ntawm cov xim, tsis tshua muaj nqi thiab yooj yim muaj, lub peev xwm mus tau yooj yim nrog ntau yam lwm yam electronic Cheebtsam nyob rau hauv cov circuits.

Tab sis lub ntsiab zoo dua ntawm LEDs yog hais tias vim lawv me me luaj li cas, ib txhia ntawm lawv tej zaum yuav feeb meej nyob rau hauv ib compact tsev nyob, txoj kev ua ib tug thiaj li hu ua xya-ya zaub.

Xya-ya zaub muaj xya LEDs (li no nws lub npe), cov lo lus uas peb duab plaub, raws li qhia nyob rau hauv daim duab. Txhua lub xya ya LED yog hu ua, txij thaum lub illumination ntawm lub ya ntaub ntawv qhov tus xov tooj (12 decimal los yog hexadecimal tooj system). Tej zaum nyob rau hauv tib pob siv 8 ntxiv LED. Nws ua hauj lwm pab mus tso saib tus zauv point (DP), yog li cia tso saib ib tug zauv feem, yog ob tug los yog ntau tshaj ntawm cov 7-ya qhia kev cob cog rua ua ke los sawv cev rau tus xov tooj ntau tshaj li kaum.

Txhua lub xya ya LED zaub cob cog rua rau ib tug duas paub hu rau ncoo kab pov tseg ncaj qha rau ntawm lub yas taw qhia vaj tse nyob. LED hu uas sau tias cim npe los ntawm ib tug mus g, cov sawv cev txhua tus neeg ya. Lwm yam neeg uas LED feem kev cob cog rua ua ke thiab tsim ib qho tso zis.

Yog li, lub rau pem hauv ntej kev tsis ncaj ncees yog txhab khoom mus rau qhov tsim nyog hu LED feem nyob rau hauv ib qho kev txiav txim, yuav ua rau ib co ntawm cov feem teeb li, thiab tus so yuav nyob twj ywm blacked tawm, uas koj mus rau ntsiab lub yam cim ntawm lub template, uas yuav tsum muaj nyob rau hauv cov zaub. Qhov no tso cai rau peb sawv cev txhua lub kaum decimal tug lej tom qab 0 txog 9, ib tug 7-ya zaub.

Cov kev xaus yog feem ntau siv los mus txiav txim lub hom 7-ya zaub. Txhua LED screen muaj ob tug tso zis connectors, yog ib tus uas yog hu ua tus "anode" thiab lwm yam, ntsig txog, yog hu ua tus "cathode". Yog li ntawd, xya-ya LED qhov taw qhia tej zaum yuav muaj ob hom ntawm Circuit Court kev kawm - ib qho cathode (neeg no) thiab ib qho anode (Oa).

Qhov txawv ntawm ob hom ntawm qhia yog tias tus tsim ntawm lub OC cathodes tag nrho 7 feem ncaj qha kev cob cog rua nrog ib lwm, thiab nyob rau hauv Circuit Court nrog ib qho (Oa) yog kev cob cog rua ntawm lub anode ntawm anodes 7 feem. Ob circuits khiav lag luam raws li nram no.

• Cov hom cathode (neeg no) - interconnected cathodes ntawm tag nrho cov LED feem muaj ib tug logic theem "0" los yog kev cob cog rua rau GND. Tus neeg feem muaj tso tawm rau lawv anode mov tso zis lub teeb liab ntawm "high" logic theem los yog logic "1" los ntawm ib tug txawj resistor los ua ib tug pem hauv ntej kev tsis ncaj ncees ntawm ib tug neeg LEDs.
• Common anode (Oa) - anodes tag nrho LED feem ua ke thiab ib tug logic theem "1". Cov theem ntawm qhov ntsuas lub teeb thaum txhua tus neeg compound lub cathode rau hauv av, cov zajlus kom "0" los sis tsawg-qib teeb liab los ntawm ib tug coj tam sim no txawj resistor.

Nyob rau hauv kev, xya-ya LEDs nrog ntau anode yog nrov dua vim hais tias muaj ntau yam logic circuits yuav tsum tau ntau tam sim no tshaj yog tau muab lub hwj chim qhov twg los. Tsis tas li ntawd nco ntsoov tias cov zaub ntau cathode tsis yog ib tug ncaj qha kev hloov Circuit Court rau ib tug zaub nrog ib tug ntau anode. Thiab vice versa - qhov no yog sib npaug rau cov menyuamuas ntawm LEDs nyob rau hauv lub rov qab coj, thiab yog li, teeb emission tsis tshwm sim.

Txawm hais tias nws muaj peev xwm yuav kho tau raws li ib tug tib zaub, nws yog ib tug 7-ya zaub tseem muaj xya tus neeg LEDs nyob rau hauv ib lub pob, thiab raws li xws li, lub LEDs yuav tsum tau muaj kev tiv thaiv tiv thaiv overcurrent. LEDs emit teeb thaum lawv moog nyob rau hauv lub rau pem hauv ntej kev taw qhia, thiab tus nqi ntawm lub teeb tawm txim liab yog xwm yeem mus rau hauv tib neeg tam sim no. Nws tsuas txhais tau tias lub LED teeb siv tsub kom kwv yees li linearly nrog ua tam sim no. Yog li ntawd, nyob rau hauv kev txiav txim kom tsis txhob muaj kev puas tsuaj rau lub LED, qhov no ncaj qha tam sim no yuav tsum tau tswj thiab txwv rau ib tug muaj kev ruaj ntseg nqi ntawm sab nraud limiting resistor.

Cov xya ya qhia yog hu ua zoo li qub. Ib tug tseem ceeb disadvantage yog cov loj tus naj npawb ntawm pins nyob rau hauv lub pob. Yuav kom kov yeej no muaj kev txwv siv dynamic tswj tswvyim xya ya zaub.

Xya-ya qhia tau zoo kawg muaj koob meej ntawm xov tooj cua amateurs, vim hais tias nws yog yooj yim siv thiab yooj yim rau to taub.