Lub GoodNightLight: Lub Teeb Nruab Nrab Nruab Nrab Yooj Yim: 5 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:28

Los ntawm ohoilettFollow Ntau los ntawm tus sau:

Txog: Kawm tiav cov tub ntxhais kawm ntawm Purdue University, kws kho mob biomedical, cov neeg siv hluav taws xob, kws qhia ntawv, sim kawm me ntsis txog kev tsim vaj tsev thiab kev tsim kho ntxiv Txog ohoilett »

Nyob zoo txhua tus, Kuv qhia Bioinstrumentation chav kawm rau cov tub ntxhais kawm theem nrab nyob rau lub caij ntuj no uas yog ib feem ntawm Purdue GERI (Lub Koom Haum Muaj Txuj Ci Kev Kawm Txuj Ci). Hauv chav kawm no, Kuv qhia cov tub ntxhais kawm txog cov hauv paus ntawm kev siv hluav taws xob thiab seb peb siv cov khoom siv hluav taws xob li cas hauv Biomedical Engineering. Kuv tau pom tias lub teeb pom kev hmo ntuj yog lub hauv paus pib zoo rau cov tub ntxhais kawm kawm txog kev siv hluav taws xob. Nws suav nrog ob peb yam tseem ceeb xws li resistors thiab LEDs. Nws kuj suav nrog cov khoom nruab nrab ntau dua, uas yog lub tshuab ua haujlwm zoo thiab muaj txiaj ntsig zoo, uas yog lub tshuab hluav taws xob. Cov txheej txheem ntawm Circuit qhia cov tub ntxhais kawm yuav ua li cas peb tuaj yeem siv cov kev sib txuas los cuam tshuam nrog ntiaj teb sab nrauv thiab tsim qee yam kev tso tawm. Hauv qhov no, lub teeb pom kev tsaus ntuj thaum lub teeb pom kev ib puag ncig qis dua thiab tua thaum lub teeb pom kev ib puag ncig nce ntxiv. Txhua leej txhua tus nyiam pom cov LEDs qhib thiab kaw cia. Kuv hais rau niam txiv tias kuv yuav tshaj tawm ntau yam kev kawm online (thiab kuv ob peb hlis tom qab o_O) yog li ntawm no kuv mus nrog thawj tus! Vam tias koj txaus siab rau Kuv Cov Lus Qhia rau GoodNightLight.

Kauj Ruam 1: Photoresistor lossis Light-Dependent Resistor (LDR)

Tus photoresistor yog tus tivthaiv yooj yim uas hloov kev tiv thaiv nrog teeb pom kev zoo. Cov tshuaj tiv thaiv muaj cov khoom siv hluav taws xob uas ua rau cov khoom tiv thaiv kom txo qis nrog lub teeb (ntau lub teeb). Hloov pauv, qhov tsis kam ntawm cov khoom siv nce nrog lub teeb qis (nws tau tsaus dua). Tus kws yees duab yog lub luag haujlwm txhawm rau txheeb xyuas kev hloov pauv ntawm lub teeb ib puag ncig, uas yuav ua rau pom kev hmo ntuj. Xav tias dawb los ntsuas qhov tsis kam ntawm photoresistor nrog lub ntsuas cua kom pom tias nws qhov kev tiv thaiv hloov pauv li cas thaum koj npog thiab nthuav tawm lub photoresistor nrog koj tus ntiv tes lossis lwm yam khoom tsis zoo.

Kauj ruam 2: Voltage Divider

Qhov faib hluav taws xob yog ib txoj hauv kev yooj yim ntawm kev cuam tshuam nrog lub zog hloov pauv, uas yog ib feem uas txhais ib hom ntawm lub zog mus rau qhov tsis kam. Hauv kab lus no, peb qhov kev hloov pauv hloov pauv yog peb tus photoresistor. Qhov faib hluav taws xob tau tsim los ntawm ob tus tiv thaiv hauv koob (txuas ib qho tom qab ib qho). Ib qhov hluav taws xob, zoo li roj teeb, txuas nrog ib qho ntawm cov resistors hauv qhov faib thiab lwm tus tiv thaiv txuas nrog hauv av. Qhov sib npaug rau qhov faib hluav taws xob yog raws li hauv qab no: Vout = Vin*R2 / (R2 + R1)

Raws li peb tuaj yeem pom los ntawm qhov sib npaug, R1 thiab R2 ncaj qha txiav txim siab qhov tso tawm ntawm qhov faib hluav taws xob. Txheeb xyuas qhov sib npaug me ntsis ntxiv, peb pom tias raws li R2 nce, Vout tau los ze zog rau Vin. Peb tau hais hauv peb cov kauj ruam yav dhau los tias qhov tsis kam ntawm lub photoresistor nce nrog ua kom pom kev ib puag ncig. Peb yuav tso peb tus photoresistor nyob hauv R2 txoj haujlwm ntawm qhov faib hluav taws xob no.

Kauj Ruam 3: Sib Piv thiab Tso Tawm LED

Ib tus neeg sib piv yog qhov yooj yim Circuit Court uas sib piv ob qhov hluav taws xob. Yog tias qhov hluav taws xob ntawm qhov tsis hloov pauv (qhov nkag ntawm op amp nrog "+" kos npe) ntau dua qhov hluav taws xob ntawm qhov hloov pauv hloov (cov tswv yim ntawm op amp nrog "-" kos npe), cov zis ntawm tus sib piv yuav tig rau LED. Yog tias qhov sib txawv yog qhov tseeb, qhov kev tso tawm ntawm tus sib piv yuav ua rau LED tawm. Yog tias koj tsis tau siv LEDs ua ntej, paub tias lawv ci thaum lub zog me me dhau los ntawm lawv. Kawm paub ntau ntxiv txog LEDs los ntawm Cov Lus Qhia Zoo no.

Rau peb tus neeg sib piv, peb yuav siv LM324 lub tshuab ua kom nrov nrov. LM324 yog plaub lub suab nrov nrov, txhais tau tias nws muaj 4 lub tshuab ua suab nrov ua rau hauv ib pob. Peb tsuas yog xav tau ib qho ntawm 4 lub tshuab hluav taws xob. Hlau LM324 raws li qhia hauv kab lus.

Kauj Ruam 4: Cov lus xaus thiab Kev Xav Thaum Kawg

Hauv cov lus qhia no, Kuv tau ua piv txwv yooj yim tig rau ntawm LED nrog hloov pauv ntawm qhov pom kev ib puag ncig. Thov siv koj lub tswv yim tig los ua qhov tseeb "hmo ntuj".

Kauj ruam 5: Troubleshooting

1. Hauv Cov Lus Qhia no, Kuv pom zoo kom ntxiv 10k resistor hauv koob nrog koj tus photoresistor. Nyob ntawm qhov "nominal" tsis kam ntawm koj tus photoresistor, koj yuav xav hloov 10k resistor rau lwm yam. Kuv xav kom ntsuas ntsuas qhov tsis kam ntawm photoresistor nrog koj lub multimeter thaum koj lub photoresistor raug rau ib puag ncig thiab thaum lub ntsuas tau npog los ntawm qee yam khoom txawv teb chaws. Koj xav xaiv cov koob tshuaj tiv thaiv uas loj dua qhov tiv thaiv ntawm photoresistor thaum nws raug lub teeb pom kev ib puag ncig, tab sis me dua qhov tsis kam ntawm photoresistor thaum nws tau npog. Piv txwv li, rau tus kws kho duab kuv siv, nws muaj kev tiv thaiv thaum pom lub teeb pom kev ib puag ncig 8k. Thaum kuv npog lub photoresistor nrog kuv tus ntiv tes, nws tiv taus nce mus rau 48k.

2. Nco ntsoov tias qhov uas koj txuas qhov faib hluav taws xob rau qhov nkag tau zoo ntawm op amp. Ua tib zoo mloog rau kev sib txuas hauv Kauj Ruam 3.

3. Ua zoo dev tom ntawm lub teeb pom kev zoo ntawm LED. Cov ceg luv yog "tsis zoo" thiab yuav tsum txuas rau hauv av.