Cov txheej txheem:

Kev Ntsuam Xyuas Vaj Huam Sib Luag Hnub Ci Siv Particle Photon: 7 Cov Kauj Ruam
Kev Ntsuam Xyuas Vaj Huam Sib Luag Hnub Ci Siv Particle Photon: 7 Cov Kauj Ruam

Video: Kev Ntsuam Xyuas Vaj Huam Sib Luag Hnub Ci Siv Particle Photon: 7 Cov Kauj Ruam

Video: Kev Ntsuam Xyuas Vaj Huam Sib Luag Hnub Ci Siv Particle Photon: 7 Cov Kauj Ruam
Video: Xwm Kab Yog Dab Tsi?: Hmoob Nkag Siab Yuam Kev Tag Lawm 2024, Kaum ib hlis
Anonim
Kev Ntsuas Vaj Huam Sib Luag Hnub Ci Siv Particle Photon
Kev Ntsuas Vaj Huam Sib Luag Hnub Ci Siv Particle Photon

Lub hom phiaj ntawm txoj haujlwm yog txhawm rau txhim kho kev ua haujlwm ntawm cov hnub ci ci. Txoj haujlwm no yog tsim los saib xyuas hnub ci photovoltaic lub zog tsim los txhim kho kev ua haujlwm, tshuaj xyuas thiab kho lub hnub ci cog.

Hauv qhov haujlwm no, cov khoom siv photon cuam tshuam nrog tus pin tso zis hluav taws xob ntawm lub hnub ci vaj huam sib luag, LM-35 ntsuas kub thiab LDR sensor los saib xyuas lub zog tso tawm, ntsuas kub thiab teeb pom kev zoo ib yam. Ib tus cim LCD tseem cuam tshuam nrog cov duab photon rau lub sijhawm tiag tiag ntawm cov ntsuas ntsuas. Photon tsis tsuas yog qhia cov ntsuas ntsuas ntawm lub vijtsam LCD, tabsis tseem xa cov ntsuas ntsuas mus rau huab server rau saib cov ntaub ntawv ntawm lub sijhawm.

Kauj Ruam 1: Yuav tsum muaj cov khoom siv

  • Particle Photon $ 20
  • 16x2 LCD $ 3
  • Hnub ci phaj $ 4
  • LM-35 ntsuas kub $ 2
  • LDR $ 1 os
  • Nqaij npuas kib $ 4
  • Jumper xov hlau $ 3

Tus nqi tag nrho ntawm cov cuab yeej kho mob nyob ib puag ncig $ 40 daus las.

Kauj ruam 2: Kho vajtse

Kho vajtse
Kho vajtse
Kho vajtse
Kho vajtse
Kho vajtse
Kho vajtse

1. Particle Photon

Photon yog pawg IoT nrov uas muaj los ntawm Particle platform. Pawg thawj coj tsev STM32F205 120Mhz ARM Cortex M3 microcontroller thiab muaj 1 MB nco lub cim xeeb, 128 Kb RAM thiab 18 qhov sib xyaw teeb liab lub hom phiaj dav dav tso tawm (GPIO) pins nrog cov khoom siv siab tshaj. Tus qauv muaj nyob rau ntawm board Cypress BCM43362 Wi-Fi nti rau Wi-nkaus txuas thiab Ib leeg band 2.4GHz IEEE 802.11b/g/n rau Bluetooth. Lub rooj tsavxwm tau nruab nrog 2 SPI, ib I2S, ib I2C, ib tus tuaj yeem thiab ib qho USB interface.

Nws yuav tsum tau sau tseg tias 3V3 yog cov lim dej tau siv rau kev ntsuas analog. Tus pin no yog qhov tso tawm ntawm tus tswj hwm ntawm lub rooj tsavxwm thiab txuas nrog sab hauv nrog VDD ntawm Wi-nkaus module. Thaum fais fab Photon ntawm VIN lossis USB chaw nres nkoj, tus pin no yuav tso tawm qhov hluav taws xob ntawm 3.3VDC. Tus pin no tseem tuaj yeem siv los txhawb lub zog Photon ncaj qha (cov tswv yim siab tshaj 3.3VDC). Thaum siv los ua qhov tso tawm, qhov siab tshaj plaws ntawm 3V3 yog 100mA. PWM cov cim muaj kev daws teeb meem ntawm 8-ntsis thiab ua haujlwm ntawm 500 Hz.

2. 16X2 Cim LCD

16X2 LCD zaub yog siv los tso saib qhov txiaj ntsig ntawm qhov ntsuas tsis tau. Nws txuas nrog rau Particle Photon los ntawm kev txuas nws cov ntaub ntawv pins D4 rau D7 rau tus pin D0 rau D3 ntawm Pawg Thawj Coj. E thiab RS pins ntawm LCD txuas nrog pins D5 thiab D6 ntawm Pawg Thawj Tswj Hwm feem. R/W tus pin ntawm LCD yog hauv av.

3. LDR sensor (Photoresistor)

LDR lossis lub teeb nyob ntawm tus tiv thaiv kuj tseem hu ua yees duab resistor, photocell, photoconductor. Thaum lub teeb poob rau ntawm tus tiv thaiv, tom qab ntawd qhov tsis kam hloov pauv. Cov resistors no feem ntau siv hauv ntau lub voj voos uas nws xav tau kom pom qhov pom pom ntawm lub teeb. Cov resistors no muaj ntau txoj haujlwm thiab ua haujlwm tsis zoo. Piv txwv li, thaum LDR nyob hauv qhov tsaus ntuj, tom qab ntawd nws tuaj yeem siv los qhib lub teeb lossis tig tua lub teeb thaum nws nyob hauv qhov pom kev. Lub teeb pom kev zoo ib txwm tiv taus muaj kev tiv thaiv hauv qhov tsaus ntuj ntawm 1MOhm, thiab hauv qhov ci ci tiv thaiv ob peb KOhm.

Txoj Cai Ua Haujlwm ntawm LDR

Tus tiv thaiv no ua haujlwm ntawm lub hauv paus ntsiab lus ntawm kev coj ua duab. Nws tsis muaj dab tsi tab sis, thaum lub teeb poob rau ntawm nws saum npoo, tom qab ntawd cov khoom siv hluav taws xob txo qis thiab tseem muaj cov khoom siv hluav taws xob hauv qhov muaj txiaj ntsig zoo ntawm lub cuab yeej zoo siab rau cov pab pawg. Cov photons hauv qhov teeb meem yuav tsum muaj lub zog ntau dua li qhov sib txawv ntawm cov khoom siv hluav taws xob cov khoom siv. Qhov no ua rau cov hluav taws xob dhia los ntawm cov pab pawg valence mus rau kev coj ua. Qhov cuab yeej no vam khom lub teeb, thaum lub teeb poob ntawm LDR ces qhov kev tiv thaiv txo qis, thiab nce hauv qhov tsaus ntuj. Thaum LDR raug khaws cia hauv qhov chaw tsaus, nws qhov kev tiv thaiv siab thiab, thaum LDR khaws cia hauv qhov pom kev nws qhov kev tiv thaiv yuav txo qis. LDR sensor siv los ntsuas qhov teeb pom kev zoo qhov teeb meem. Lub teeb siv tau qhia hauv Lux. Lub sensor tau txuas nrog A2 tus pin ntawm Particle Photon. Lub sensor tau txuas nrog hauv qhov muaj peev xwm faib hluav taws xob. LDR muab qhov hluav taws xob sib piv uas tau hloov pauv mus rau kev nyeem digital los ntawm ADC-built-in.

4. LM-35 Kub sensor

LM35 yog qhov ntsuas kub IC qhov tseeb nrog nws cov zis sib npaug rau qhov ntsuas kub (hauv oC). Kev ua haujlwm kub ntau yog los ntawm -55 ° C txog 150 ° C. Cov zis hluav taws xob sib txawv los ntawm 10mV hauv kev teb rau txhua qhov oC nce/ poob hauv qhov kub ib puag ncig, piv txwv li, nws qhov ntsuas ntsuas yog 0.01V/ oC. Lub sensor muaj peb tus pin - VCC, Analogout thiab Av. Aout tus pin ntawm LM35 txuas nrog Analog tus pin pin A0 ntawm cov khoom siv photon. VCC thiab av tau txuas nrog VCC thiab Av.

Nta

Calibrated ncaj qha hauv Degree Celsius (Centigrade)

Tawm ntawm 10.0 mV/° C scale factor

  • 0.5 ° C raug lees paub-muaj peev xwm (ntawm a25 ° C)
  • Rated kom puv -55 ° C txog 150 ° C
  • Ua haujlwm ntawm 4 txog 30 volts
  • Tsawg tshaj 60 mA tam sim no ntws
  • Tsawg tus kheej cua sov, 0.08 ° C tso cua
  • Tsis-linearity tsuas yog 0.25 ° C raug
  • Tsawg impedance tso zis, 0.1Ω rau 1 mA load

5. Solar Vaj Huam Sib Luag

Hnub ci vaj huam sib luag yog cov khoom siv uas hloov lub teeb ua hluav taws xob. Lawv tau txais lub npe "hnub ci ci" los ntawm lo lus 'Sol' siv los ntawm cov kws tshawb fawb hnub qub los hais txog lub hnub thiab tshav ntuj. Cov no tseem hu ua photovoltaic panels qhov twg Photovoltaic txhais tau tias "lub teeb hluav taws xob". Qhov tshwm sim ntawm kev hloov lub hnub ci rau lub zog hluav taws xob yog hu ua photovoltaic effect. Cov txiaj ntsig no ua rau muaj qhov hluav taws xob thiab tam sim no ntawm qhov tso tawm ntawm qhov pom ntawm lub hnub ci zog. A 3 Volts Solar vaj huam sib luag tau siv hauv txoj haujlwm. Lub hnub ci vaj huam sib luag muaj ntau lub hnub ci ntawm tes lossis photovoltaic diodes. Cov hnub ci no yog P-N kev sib txuas diode thiab lawv tuaj yeem tsim hluav taws xob teeb liab thaum pom lub hnub ci. Thaum raug lub hnub ci, lub hnub ci vaj huam sib luag no ua rau DC qhov hluav taws xob tso tawm ntawm 3.3 V ntawm nws cov dav hlau. Lub vaj huam sib luag no tuaj yeem muaj lub zog tso zis ntau tshaj ntawm 0.72 Watt thiab lub zog tso tawm tsawg kawg ntawm 0.6 Watt. Nws qhov siab tshaj tam sim no yog 220 mA thiab qhov them tam sim no tsawg kawg yog 200 mA. Lub vaj huam sib luag muaj ob lub dav hlau - VCC thiab hauv av. Cov zis hluav taws xob tau kos los ntawm VCC tus pin. Tus pin tso zis hluav taws xob txuas nrog rau tus lej nkag tus pin A1 ntawm Particle Photon rau ntsuas ntsuas lub zog tso tawm los ntawm lub hnub ci vaj huam sib luag.

Kauj ruam 3: Software

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Particle web IDE

Txog kev sau cov phiaj xwm txheej txheem rau ib qho Photon, tus tsim tawm yuav tsum tsim tus as khauj hauv Particle lub vev xaib thiab sau npe rau Photon board nrog nws tus lej siv. Txoj cai program yuav tuaj yeem sau rau ntawm Web IDE ntawm Particle lub vev xaib thiab xa mus rau daim ntawv sau npe hauv internet. Yog tias pawg thawj coj saib xyuas xaiv, Photon ntawm no, tau hloov pauv thiab txuas nrog huab kev pabcuam ntawm Particle, cov cai tau hlawv mus rau pawg tswj hwm xaiv hla huab cua ntawm kev sib txuas hauv is taws nem thiab pawg thawj coj pib ua haujlwm raws li qhov hloov pauv. Txog kev tswj hwm pawg thawj coj hauv is taws nem, nplooj ntawv web tau tsim los uas siv Ajax thiab Jquery xa cov ntaub ntawv mus rau pawg thawj coj siv HTTP POST txoj kev. Lub vev xaib txheeb xyuas lub rooj tsavxwm los ntawm tus lej ntaus ntawv thiab txuas rau Particle's Cloud Service los ntawm kev nkag mus rau token.

Yuav ua li cas txuas photon nrog Internet

1. Hwj chim koj ntaus ntawv

  • Txuas lub USB cable rau hauv koj lub hwj chim.
  • Sai li nws tau ntsaws, RGB LED ntawm koj lub cuab yeej yuav tsum pib ntsais muag xiav. Yog tias koj lub cuab yeej tsis ntsais muag xiav, tuav lub pob SETUP. Yog hais tias koj lub cuab yeej tsis ntsais muag tag nrho, lossis yog tias lub LED kub hnyiab txiv kab ntxwv xim, nws yuav tsis tau txais lub zog txaus. Sim hloov koj lub zog lossis USB cable.

2. Txuas koj li Photon mus rau Is Taws Nem Muaj ob txoj hauv kev yog koj siv web application lossis mobile app

a Kev siv web daim ntawv thov

  • Kauj ruam 1 Mus rau setup.particle.io
  • Kauj ruam 2 Nyem rau teeb tsa Photon
  • Kauj Ruam 3 Tom qab nyem rau NEXT, koj yuav tsum tau nthuav tawm nrog cov ntawv (photonsetup.html)
  • Kauj ruam 4 Qhib cov ntawv.
  • Kauj Ruam 5 Tom qab qhib cov ntawv txuas koj lub PC rau Photon, los ntawm kev txuas mus rau lub network npe PHOTON.
  • Kauj Ruam 6 Kho koj li ntaub ntawv pov thawj Wi-Fi. Ntau: Yog tias koj ua yuam kev koj li ntawv pov thawj, Photon yuav ntsais xiav xiav lossis ntsuab. Koj yuav tsum mus dhau cov txheej txheem dua (los ntawm kev rov ua nplooj ntawv lossis nyem rau ntawm qhov txheej txheem rov ua dua)
  • Kauj ruam 7 Hloov koj lub cuab yeej. Koj tseem yuav pom qhov kev lees paub yog tias lub cuab yeej tau thov lossis tsis yog.

b. Siv smartphone

  • Qhib lub app ntawm koj lub xov tooj. Nkag mus lossis kos npe rau tus as khauj nrog Particle yog tias koj tsis muaj.
  • Tom qab nkag mus, nias lub cim ntxiv thiab xaiv lub cuab yeej koj xav ntxiv. Tom qab ntawd ua raws cov lus qhia ntawm lub vijtsam txhawm rau txuas koj lub cuab yeej rau Wi-nkaus.

Yog tias qhov no yog koj li Photon thawj zaug sib txuas, nws yuav ntsais liab doog rau ob peb feeb thaum nws rub tawm tshiab. Nws yuav siv sijhawm 6-12 feeb rau qhov hloov tshiab kom ua tiav, nyob ntawm koj li kev txuas hauv is taws nem, nrog Photon rov pib dua ob peb zaug hauv tus txheej txheem. Tsis txhob rov pib dua lossis tshem koj lub Photon lub sijhawm no. Yog tias koj ua, koj yuav tsum ua raws phau ntawv qhia no txhawm rau txhim kho koj lub cuab yeej.

Thaum koj tau txuas koj lub cuab yeej, nws tau kawm lub network ntawd. Koj lub cuab yeej tuaj yeem khaws txog tsib lub network. Txhawm rau ntxiv lub network tshiab tom qab koj teeb tsa thawj zaug, koj yuav tso koj lub cuab yeej rau hauv Hom Mloog dua thiab ua raws li saum toj no. Yog tias koj zoo li koj lub cuab yeej muaj ntau lub network ntawm nws, koj tuaj yeem so koj lub cuab yeej nco ntawm ib qho Wi-nkaus tes hauj lwm nws tau kawm. Koj tuaj yeem ua tau los ntawm kev txuas ntxiv tuav lub pob teeb tsa rau 10 vib nas this kom txog thaum RGB LED ntsais muag xiav sai, qhia tau tias txhua qhov profile tau raug tshem tawm.

Hom

  • Cyan, koj Photon txuas nrog Internet.
  • Magenta, tam sim no nws tau rub tawm app lossis hloov kho nws cov firmware. Lub xeev no tau tshwm sim los ntawm kev hloov kho firmware lossis los ntawm qhov ua kom pom tseeb los ntawm Web IDE lossis Desktop IDE. Koj yuav pom hom no thaum koj txuas koj Photon rau huab thawj zaug.
  • Ntsuab, nws tau sim txuas rau hauv is taws nem.
  • Dawb, Wi-nkaus module raug kaw.

Web IDEParticle Tsim yog Kev Txhim Kho Ib Leeg Ib puag ncig, lossis IDE uas txhais tau tias koj tuaj yeem tsim kho software hauv daim ntawv thov siv tau yooj yim, uas tsuas yog tshwm sim los ua haujlwm hauv koj lub vev xaib.

  1. Txhawm rau qhib tsim, nkag mus rau koj tus lej nyiaj thiab tom qab ntawv nyem rau tsim raws li qhia hauv duab.
  2. Thaum koj nyem koj yuav pom console zoo li no.
  3. Txhawm rau tsim qhov tsim tshiab app, nyem rau ntawm tsim app tshiab.
  4. Txhawm rau suav nrog lub tsev qiv ntawv hauv qhov program, mus rau ntu cov tsev qiv ntawv, tshawb rau cov kua ua kua. Kev xaiv ib qho app uas koj xav ntxiv lub tsev qiv ntawv. Hauv kuv qhov xwm txheej nws yog solarpanelmonitoring.
  5. Txhawm rau txheeb xyuas qhov program. Nyem rau qhov tseeb.
  6. Txhawm rau upload cov cai, nyem rau nyem tab sis ua ntej ua qhov ntawd xaiv lub cuab yeej. Nyem rau ntawm "Devices" lub cim nyob rau hauv qab sab laug ntawm lub pane navigation, tom qab ntawd thaum koj yuj hla lub npe ntaus ntawv lub hnub qub yuav tshwm ntawm sab laug. Nyem rau nws kom teeb tsa lub cuab yeej uas koj nyiam hloov kho (nws yuav tsis pom yog tias koj tsuas muaj ib lub cuab yeej). Thaum koj tau xaiv lub cuab yeej, lub hnub qub cuam tshuam nrog nws yuav tig daj. (Yog tias koj tsuas muaj ib lub cuab yeej, tsis tas yuav xaiv nws, koj tuaj yeem txuas ntxiv mus.

Kauj Ruam 4: Lub Circuit Court Ua Haujlwm Li Cas

Hauv Circuit Court, 6 GPIO pins ntawm tus qauv tau siv los cuam tshuam tus yam ntxwv LCD thiab peb tus lej sib txuas sib txuas siv los cuam tshuam LM-35 ntsuas kub, Hnub ci vaj huam sib luag thiab LDR sensor.

Thaum cov kab hluav taws xob tau sib sau ua ke, nws tau npaj rau xa nrog rau lub hnub ci vaj huam sib luag. Thaum lub hnub ci vaj huam sib luag ua hluav taws xob, txuas nrog lub cuab yeej. Cov cuab yeej siv los ntawm cov khoom siv hluav taws xob uas yog tswj hwm lwm qhov kev ua tau zoo txhim kho cov cuab yeej ib yam. Thaum lub cuab yeej siv tau, qee cov lus pib tau tshwm ntawm nws lub LCD qhia pom lub hom phiaj ntawm daim ntawv thov. Lub zog tso tawm ntawm lub vaj huam sib luag, qhov kub thiab qhov xwm txheej teeb pom kev zoo yog ntsuas los ntawm Voltage Output pin ntawm lub hnub ci vaj huam sib luag, LM-35 ntsuas kub thiab LDR sensor feem. Lub Voltage Output tus pin ntawm lub hnub ci vaj huam sib luag, LM-35 ntsuas kub thiab LDR sensor txuas nrog rau tus pin analog input A1, A0 thiab A2 ntawm Particle Photon.

Qhov tsis sib xws yog ntsuas los ntawm kev nkag siab qhov hluav taws xob sib piv ntawm cov koob. Qhov ntsuas hluav taws xob zoo ib yam tau lees paub ntawm tus lej sib txawv tau hloov pauv mus rau qhov muaj txiaj ntsig zoo siv hauv-tsim ADC raws. Particle Photon muaj 12-ntsis ADC raws. Yog li cov lej qhov muaj nuj nqis tuaj yeem sib txawv ntawm 0 txog 4095. Ntawm no, nws tau kwv yees tias lub network tiv thaiv cuam tshuam nrog LDR sensor nrog tus pin tus lej ntsuas tau ntsuas kom pom lub teeb pom kev los ntawm kev ncaj ncees ncaj ncees.

LM-35 IC tsis xav tau kev ntsuas ntsuas sab nraud lossis txiav kom muab qhov tseeb ntawm ± 0.25 ° C ntawm chav sov thiab ± 0.75 ° C tshaj qhov kub ntawm -55 ° C txog 150 ° C. Raws li qhov xwm txheej ib txwm muaj, ntsuas qhov ntsuas kub los ntawm lub ntsuas cua yuav tsis tshaj lossis thim rov qab ua haujlwm ntawm lub ntsuas. Los ntawm kev txiav thiab ntsuas ntsuas ntawm qib wafer, kev siv lub ntsuas cua ntawm tus nqi qis dua yog qhov ua tau zoo. Vim tias qhov tsawg-impedance tso tawm, tso tawm tawm ncaj qha, thiab ntsuas qhov tseeb ntawm LM-35, kev cuam tshuam ntawm lub sensor mus rau kev tswj hluav taws xob tau yooj yim. Raws li LM-35 cov cuab yeej kos tsuas yog 60 uA los ntawm cov khoom siv, nws muaj cua sov tus kheej qis dua 0.1 ° C hauv huab cua tseem nyob. Feem ntau ntawm qhov kub thiab txias los ntawm -55 ° C txog 150 ° C, qhov hluav taws xob tso tawm ntawm lub ntsuas hluav taws xob nce ntxiv 10 mV ib qib Celsius. Qhov ntsuas hluav taws xob ntawm lub ntsuas hluav taws xob tau muab los ntawm cov qauv hauv qab no

Vout = 10 mV/° C*T

qhov twg, Vout = Voltage tso zis ntawm lub sensor

T = Kub hauv degrees Celsius Yog li, T (hauv ° C) = Vout/10 mV

T (hauv ° C) = Vout (hauv V)*100

Yog tias VDD xav tias yog 3.3 V, kev nyeem ntawv sib piv muaj feem cuam tshuam nrog kev nkag siab qhov hluav taws xob ntau dua 12-ntsis los ntawm cov qauv hauv qab no

Vout = (3.3/4095)*Analog-Nyeem Ntawv

Yog li, qhov ntsuas kub hauv qib Celsius tuaj yeem muab los ntawm cov qauv hauv qab no

T (hauv ° C) = Vout (hauv V)*100

T (hauv ° C) = (3.3/4095) *Analog-Nyeem *100

Yog li, qhov ntsuas kub tuaj yeem ntsuas ncaj qha los ntawm kev nkag siab qhov hluav taws xob analog tawm los ntawm lub ntsuas. Kev ua haujlwm analogRead yog siv los nyeem qhov sib piv ntawm qhov ntsuas tus pin. Qhov hluav taws xob tso tawm ntawm lub hnub ci vaj huam sib luag yuav tsum yog feem ntau 3 V uas tuaj yeem nkag siab ncaj qha los ntawm Particle Photon. Particle photon tuaj yeem nkag siab qhov ncaj qha txog 3.3 V. Kev nyeem cov lej hluav taws xob tau ntsuas ntau dua 12-ntsis xws li 0 txog 4095. Yog li

Vout = (3.3/4095)*Analog-Nyeem Ntawv

Kev nyeem cov ntaub ntawv ntsuas tau pom ua ntej ntawm lub vijtsam LCD thiab tom qab ntawd dhau mus rau Huab Huab ntawm Kev Txuas Wi-nkaus. Tus neeg siv yuav tsum nkag mus rau hauv Particle tus lej sau npe txhawm rau txhawm rau saib qhov nyeem qhov tseem ceeb. Lub platform tso cai txuas rau lub rooj tsavxwm los ntawm tus lej sau npe. Tus neeg siv tuaj yeem saib xyuas tau txais cov ntaub ntawv sensor hauv lub sijhawm thiab tseem tuaj yeem teev cov ntaub ntawv.

Kauj Ruam 5: Kev Sib Txuas thiab Daim Duab Duab Circuit

Kev Sib Txuas thiab Circuit Diagram
Kev Sib Txuas thiab Circuit Diagram
Kev Sib Txuas thiab Circuit Diagram
Kev Sib Txuas thiab Circuit Diagram

Photon ==> LCD

D6 ==> RS

D5 ==> Pab kom

D3 ==> DB4

D2 ==> DB5

D1 ==> DB6

D0 ==> DB7

Photon ==> LM-35

A0 ==> Ua tsaug

Photon ==> LDR

A2 ==> Vcc

Photon ==> Hnub ci phaj

A1 ==> Vcc

Kauj Ruam 6: Qhov tshwm sim

Pom zoo: