Yuav ua li cas 2024, Kaum ib hlis

3D Lub Cev Scanner Siv Raspberry Pi Cov Koob Yees Duab: 8 Kauj Ruam (nrog Duab)

3D Lub Cev Scanner Siv Raspberry Pi Cov Koob Yees Duab: 8 Kauj Ruam (nrog Duab)

3D Lub Cev Lub Cev Scanner Siv Raspberry Pi Cov Koob Yees Duab: Lub tshuab luam ntawv 3D no yog txoj haujlwm sib koom tes ntawm BuildBrighton Makerspace nrog lub hom phiaj ua cov thev naus laus zis pheej yig rau cov pab pawg hauv zej zog. Cov tshuab luam ntawv tau siv hauv kev lag luam zam, txhawm rau tsim khaub ncaws tsim, hauv kev lag luam ua si rau

Arduino Stopwatch: 4 Cov Kauj Ruam (nrog Duab)

Arduino Stopwatch: 4 Cov Kauj Ruam (nrog Duab)

Arduino Stopwatch: Cov Lus Qhia no yuav qhia koj yuav ua li cas thiaj nres nres ntawm Arduino

Intel Aero Drone - Txuas Txuas Ntau Yam Wifi: 9 Kauj Ruam

Intel Aero Drone - Txuas Txuas Ntau Yam Wifi: 9 Kauj Ruam

Intel Aero Drone - Txuas Txuas Ntau Yam Wifi: Rau cov ntaub ntawv tshiab thiab txhawb nqa rau Aero, thov mus saib peb lub wiki.Qhov Aero ua raws li qhov chaw nkag (AP), txhais tau tias koj tuaj yeem txuas rau nws ua lub cuab yeej wifi. Qhov no muaj ntau ntawm ob peb meters, uas ib txwm zoo rau kev txhim kho lub hom phiaj, tab sis cia

7 SEGMENT DIGITAL CLOCK THERMOMETER: 6 Kauj Ruam

7 SEGMENT DIGITAL CLOCK THERMOMETER: 6 Kauj Ruam

7 SEGMENT DIGITAL CLOCK THERMOMETER: Nws ua haujlwm los ntawm 12v 500mA adapter.Qhov siab qhov siab yog 57 hli thiab nws qhia cov ntaub ntawv teev txhua teev nyob rau 24 teev. ntawm lub cim xeeb

Ua Dawb WiFi Hotspot ntawm Windows: 7 Kauj Ruam

Ua Dawb WiFi Hotspot ntawm Windows: 7 Kauj Ruam

Ua Dawb WiFi Hotspot ntawm Windows: Koj puas xav kom muaj lub wireless hotspot dawb thiab tsis muaj kev tshaj tawm? Nyeem cov ntawv qhia no kom paub seb yuav ua li cas

Leej Twg Nyob Ntawm Kuv Qhov Rooj? PIR Tsab ntawv tsa suab Sensor/Range Sensor Project: 5 Kauj Ruam

Leej Twg Nyob Ntawm Kuv Qhov Rooj? PIR Tsab ntawv tsa suab Sensor/Range Sensor Project: 5 Kauj Ruam

Leej Twg Nyob Ntawm Kuv Qhov Rooj? PIR Motion Sensor/Range Sensor Project: Peb tes num yog tsom kom nkag siab txog kev txav ntawm PIR thiab cov ntsuas nrug deb. Tus lej Arduino yuav tso tawm lub suab thiab lub suab qhia rau tus neeg siv ib tus nyob ze. Tus lej MATLAB yuav xa email rau kuv kom ceeb toom rau tus neeg siv tias ib tus neeg nyob ze Cov cuab yeej no

DIY Capacitive Discharge 18650 Spot Battery Welder #6: 11 Cov Kauj Ruam (nrog Duab)

DIY Capacitive Discharge 18650 Spot Battery Welder #6: 11 Cov Kauj Ruam (nrog Duab)

DIY Capacitive Discharge 18650 Spot Battery Welder #6: Nov yog 6 Lub Tshuab Roj Teeb Tab Kuv tau tsim rau hnub tim. Txij li thaum kuv thawj tus kws kho tshuab MOT, Kuv tau xav ua ib qho ntawm cov no thiab kuv zoo siab kuv tau ua! Qhov no kuv txiav txim siab ua nrog Capacitor. Cov ProTip yog yuav ua li cas thiaj li ua tau yooj yim Roj teeb Tab welder los ntawm

ESP8266: Yuav Ua Li Cas Saib Xyuas Kub thiab Vaum: 12 Kauj Ruam

ESP8266: Yuav Ua Li Cas Saib Xyuas Kub thiab Vaum: 12 Kauj Ruam

ESP8266: Yuav Ua Li Cas Saib Xyuas Kub thiab Vaum: Hauv kev qhia hnub no, peb yuav siv ESP-01, uas yog ESP8266 hauv kev teeb tsa 01 (nrog tsuas yog 2 GPIO), rau qhov ntsuas kub thiab av noo ntawm DHT22 sensor. Kuv yuav qhia koj txog cov phiaj xwm hluav taws xob thiab ESP txoj haujlwm nrog Arduino

Kho Kom Zoo Dua Qub/Tshuab Ntuav Hais Lus!: 6 Kauj Ruam

Kho Kom Zoo Dua Qub/Tshuab Ntuav Hais Lus!: 6 Kauj Ruam

Kho Kom Zoo Dua Qub/Lub Suab Hais Lus Portable!: Hav Txhua Tus! hauv kuv lub nkas -las, nrog cov hais lus tseem zoo li qub

Prototype Arduino-Raspberry Pi Soundboard: 9 Kauj Ruam (nrog Duab)

Prototype Arduino-Raspberry Pi Soundboard: 9 Kauj Ruam (nrog Duab)

Prototype Arduino-Raspberry Pi Soundboard: Lub suab tsim qauv tsim nrog Arduino thiab Raspberry Pi yog txhais tau tias yog txoj hauv kev yooj yim ntawm kev ua si 4 lub suab sib txawv lossis nrov nrov thaum muaj kev xaiv los hloov suab teeb tsa nrog pob qhov rooj thiab tso saib lub suab tam sim no teeb nrog LCD npo.*Thov

Ua Lub Khoos Phis Tawj LED Kho Kom Zoo Nkauj los ntawm 3D Luam Ntawv: 4 Kauj Ruam

Ua Lub Khoos Phis Tawj LED Kho Kom Zoo Nkauj los ntawm 3D Luam Ntawv: 4 Kauj Ruam

Ua Lub Khoos Phis Tawj LED Kho Kom Zoo Nkauj los ntawm 3D Luam Ntawv: Hauv qhov haujlwm no, kuv yuav ua lub teeb LED teeb uas tuaj yeem siv tau los ntawm USB chaw nres nkoj.No yog cov npe ntawm cov khoom siv: Flash LED diode (ua haujlwm voltage 2.1 - 3.2 V) A 100 Ohm resistor USB-A plug (Qhov no yog qhov muag tau) Cov xov hlau (Kuv

PWM DC Tsav Ceev & Tswj Lub Teeb - DC Dimmer: 7 Cov kauj ruam

PWM DC Tsav Ceev & Tswj Lub Teeb - DC Dimmer: 7 Cov kauj ruam

PWM DC Tsav Ceev & Tswj Lub Teeb | DC Dimmer: Hnub no hauv daim vis dis aus no kuv yuav qhia koj Li cas kom dim lub teeb, tswj qhov nrawm ntawm lub cav hauv DC lossis ncaj qha tam sim no yog li cia ’ s pib

Joystick Keyboard: 4 Kauj Ruam

Joystick Keyboard: 4 Kauj Ruam

Joystick Keyboard: Hauv txoj haujlwm no, peb yuav tsim cov keyboard siv joystick rau xaiv thiab tawm tswv yim thiab LCD npo rau zaub

Cov Kab Xev Digital: 4 Kauj Ruam

Cov Kab Xev Digital: 4 Kauj Ruam

Daim Kab Xev Digital: Ua kom muaj txiaj ntsig zoo siv cov ntsuas kab xev nrog atmega 328p thiab tus nas rotary encoder.very yooj yim heev pab tau thiab tseem siv tus nas qub. kom paub meej ntxiv mus ntsib kuv tus youtube channel, kuv tau tshaj tawm cov ncauj lus ntxaws vedio txog txoj haujlwm no

Tswj Koj Tus ESP8266 Los Ntawm Txhua Qhov Chaw Hauv Ntiaj Teb: 4 Kauj Ruam

Tswj Koj Tus ESP8266 Los Ntawm Txhua Qhov Chaw Hauv Ntiaj Teb: 4 Kauj Ruam

Tswj Koj Tus ESP8266 Los Ntawm Txhua Qhov Chaw Hauv Ntiaj Teb: Kuv tuaj yeem tswj hwm kuv ESP8266 los ntawm txhua qhov twg thiab tsis tas yuav teeb tsa kuv li Router Port rau kev tswj los ntawm Is Taws Nem? Kuv muaj qhov kev daws teeb meem ntawd. Nrog qhov yooj yim PhP-Server kuv tau sau, koj tuaj yeem ntxiv ESP8266 tswj ESP8266 GPIOs los ntawm txhua qhov chaw hauv les

YouTube Tus Neeg Sau Npe Suav Nrog ESP8266 IoT: 5 Cov Kauj Ruam (nrog Duab)

YouTube Tus Neeg Sau Npe Suav Nrog ESP8266 IoT: 5 Cov Kauj Ruam (nrog Duab)

YouTube Tus Neeg Sau Npe Suav Nrog ESP8266 IoT: Ntawm no kuv coj tuaj rau koj kuv thawj qhov Internet ntawm Yam (IoT) qhov haujlwm. Kuv yog tus youtuber tshiab thiab nws suab zoo rau kuv kom tuaj yeem ua rau kuv cov neeg siv suav suav suav nrog hauv kuv lub rooj lossis phab ntsa. Vim li ntawd kuv thiaj ua qhov haujlwm tsis txaus ntseeg no yooj yim thiab muaj txiaj ntsig zoo rau koj

ESP8266 Digital Thermometer Nrog LCD Zaub: 7 Kauj Ruam

ESP8266 Digital Thermometer Nrog LCD Zaub: 7 Kauj Ruam

ESP8266 Cov Ntsuas Hluav Taws Xob Nrog Cov Zaub LCD: Hnub no, kuv yuav qhia koj li cas siv TFT LCD zaub ntawm ESP8266 NodeMCU los tso saib cov ntsuas kub thiab av noo rau ib puag ncig ib puag ncig. Kuv ua piv txwv ntawm kev siv cov zaub nrog DHT22, uas yog qhov ntsuas kub thiab av noo. Hauv

Hologram Projector Nrog Pi: 5 Kauj Ruam (nrog Duab)

Hologram Projector Nrog Pi: 5 Kauj Ruam (nrog Duab)

Hologram Projector Nrog Pi: Nov yog qhov haujlwm tsim los rau chav kawm Robotics. Nws tau ua tiav raws lwm nplooj ntawv qhia https://www.hackster.io/hackerhouse/holographic-au .. Nws siv Raspberry Pi, nrog rau lub khoos phis tawj, thiab saib xyuas los tsim 3D hologram uas ua haujlwm

ESP8266 Siv PWM Nrog Potentiometer: 4 Kauj Ruam

ESP8266 Siv PWM Nrog Potentiometer: 4 Kauj Ruam

ESP8266 Siv PWM Nrog Potentiometer: Rau cov uas tsis tau siv hluav taws xob, PWM txhais tau tias tswj lub zog. Thiab hauv kev sib dhos no, peb qhia siv nws li cas los tswj lub teeb ci ntawm LED, zoo ib yam li lub teeb ci ntawm lub teeb, nrog rau kev xaiv kom tsaus thiab ci dua

DIY High Voltage 8V-120V 0-15A CC/CV Me Me Portable Adjustable Bench Power Supply: 12 Cov Kauj Ruam (nrog Duab)

DIY High Voltage 8V-120V 0-15A CC/CV Me Me Portable Adjustable Bench Power Supply: 12 Cov Kauj Ruam (nrog Duab)

DIY High Voltage 8V-120V 0-15A CC/CV Me Me Portable Adjustable Bench Power Supply: Zoo me me 100V 15Amp Fais Fab Khoom uas tuaj yeem siv tau nyob txhua qhov chaw. High Voltage, nruab nrab Amps. Yuav siv tau los them tus E-Bike, lossis tsuas yog 18650 qhov yooj yim xwb. Cov Lus Qhia Pro rau qhov kev tsim no

Haus Lub Tshuab: 7 Kauj Ruam

Haus Lub Tshuab: 7 Kauj Ruam

Lub Tshuab Haus Dej: Lub tshuab haus dej no tau tsim nrog lub hom phiaj los pab txhawb txoj hauv kev uas peb ncuav peb cov dej haus

Yuav Rov Tsim Kho Tus Hluav Taws Xob Txuas Li Cas: 4 Kauj Ruam

Yuav Rov Tsim Kho Tus Hluav Taws Xob Txuas Li Cas: 4 Kauj Ruam

Yuav Rov Tsim Kho Tus Hluav Taws Xob Txuas Li Cas: Hiya txhua tus, Kuv tsis ntev los no tau tawm tsam qhov txuas tsis zoo rau kuv lub plow daus. Qhov chaw seem tsis muaj ib qho hauv Tshuag, thiab tsis tau ua tus muab khoom. Thaum kawg kuv tau saib zoo li tsib caug nyiaj thiab ib hlis lossis ob hlis tos. Tas tas! Kuv txiav txim siab rov tsim kho lub

EZ Kev Sib Txuas Txuas Txuas Txuas Ntxiv - Tsis Muaj Tus Kheej! (CSRC-311): 7 Kauj Ruam

EZ Kev Sib Txuas Txuas Txuas Txuas Ntxiv - Tsis Muaj Tus Kheej! (CSRC-311): 7 Kauj Ruam

EZ Kev Sib Txuas Txuas Txuas Txuas Ntxiv - Tsis Muaj Tus Kheej! (CSRC-311): Tsis ntev dhau los ntawm Azamom.com (thov txim, tam sim no tau muag tawm) Kuv tau hla qhov kev pom zoo zoo ntawm Common Sense RC CSRC-311 tus qauv-siv servos.Noj zoo, Kuv xav hloov qee yam ntawm tsis tu ncua kev sib hloov. Txoj kev kuv tuaj nrog yog yooj yim heev thiab xav tau

Electronic Chameleon: 6 Kauj Ruam (nrog Duab)

Electronic Chameleon: 6 Kauj Ruam (nrog Duab)

Electronic Chameleon: Puas tau xav tsis thoob tias chameleon hloov nws cov xim li cas los ntawm kev hloov pauv ib puag ncig xim? Muaj qee yam hu ua Melanocyte Stimulating Hormone lossis MSH. Yog tias koj xav khawb ntxiv rau hauv no thov ua raws qhov Txuas no. Cov dab neeg sib nrug, Kuv xav

Bluetooth-Enabled Planetarium/Orrery: 13 Kauj Ruam (nrog Duab)

Bluetooth-Enabled Planetarium/Orrery: 13 Kauj Ruam (nrog Duab)

Bluetooth-Enabled Planetarium/Orrery: Cov lus qhia no tau tsim los ua kom tau raws txoj haujlwm xav tau ntawm Makecourse ntawm Tsev Kawm Qib Siab South Florida (www.makecourse.com) .This yog kuv lub ntiaj teb 3 lub hnub qub/orrery. Nws tau pib tawm tsuas yog ib txoj haujlwm nyob rau ib semester rau Makecour

SigFox to AWS: 29 Steps

SigFox to AWS: 29 Steps

SigFox to AWS: I.INTRODUCTION1. Tus Sau Kuv Lub Npe yog Hooi Yong Hua thiab kuv yog los ntawm Singapore Polytechnic, Diploma of Computer Engineering. Kuv yog ib feem ntawm pab pawg uas muaj 3 tus tswv cuab; Tsawg Jun Qian, Takuma kabeta thiab kuv tus kheej. Cov lus qhia no yog ib feem ntawm kev tshaj tawm

Roomba Scout Explorer: 8 Kauj Ruam

Roomba Scout Explorer: 8 Kauj Ruam

Roomba Scout Explorer: Raws li yog ib qhov kev cia siab tshaj plaws thiab tshawb fawb ntau heev hauv Asmeskas cov haujlwm, Mars rover cov haujlwm tau dhau los ua tib neeg ua tiav hauv kev tsim kho yav tom ntej ntawm kev siv tshuab thev naus laus zis rau lub hom phiaj nkaus xwb ntawm kev tshawb fawb thiab npaj siab

EAL - Embedded Programming: Khoom Qab Zib Tov Khoom 1000: 9 Cov Kauj Ruam

EAL - Embedded Programming: Khoom Qab Zib Tov Khoom 1000: 9 Cov Kauj Ruam

EAL - Embedded Programming: Khoom Qab Zib Tov Khoom 1000: Rau peb txoj haujlwm hauv Arduino peb tau txiav txim siab ua tus tov khoom rau khoom qab zib. Lub tswv yim yog tias tus neeg siv tuaj yeem thawb lub pob thiab tom qab ntawd lub tshuab yuav pib tshem cov khoom qab zib rau hauv lub tais, thiab thaum txoj haujlwm tau ua tiav nws txoj kev kawm nws yuav nres

IRobot Tsim-Mars Expedition Rover Mark I: 4 Cov Kauj Ruam

IRobot Tsim-Mars Expedition Rover Mark I: 4 Cov Kauj Ruam

IRobot Tsim-Mars Expedition Rover Mark I: Cov lus qhia no yuav qhia koj li cas teeb tsa iRobot Tsim los ntawm kev siv MatLab coding. Koj tus neeg hlau yuav muaj peev xwm tshawb nrhiav cov zaub mov los ntawm qhov sib txawv ntawm cov duab, maneuver rugged terrain los ntawm kev siv pob zeb ntsuas, thiab muaj peev xwm

Yog - Tsis yog: Arduino Driven Mailbox: 4 Cov Kauj Ruam (nrog Duab)

Yog - Tsis yog: Arduino Driven Mailbox: 4 Cov Kauj Ruam (nrog Duab)

Yog - Tsis yog: Arduino Driven Mailbox: Hauv qhov haujlwm no peb yuav qhia koj yuav ua li cas thiaj ua rau koj lub thawv ntawv lom zem dua thiab muaj txiaj ntsig. Nrog rau lub npov xa ntawv no, yog tias muaj ib tsab ntawv nyob hauv koj li ntawv koj muaj lub teeb pom kev zoo uas qhia tau yog tias koj muaj ntawv xa tuaj, thiab koj tuaj yeem tswj hwm lub thawv ntawv no nrog bluetooth kom tsis siv neeg

EAL- Kev Nyab Xeeb Sab Hauv Tsev: 5 Kauj Ruam

EAL- Kev Nyab Xeeb Sab Hauv Tsev: 5 Kauj Ruam

EAL- Embedded Sab hauv-huab cua: Rau peb txoj haujlwm hauv tsev kawm ntawv, peb tau ua lub luag haujlwm los ua ke ua ke arduino rau hauv kev siv tshuab. Peb tau xaiv los ua qhov ntsuas huab cua sab hauv tsev, uas tuaj yeem paub qhov kub thiab txias, thiab qib decibel sab hauv tsev. Peb drilled ob peb lub qhov nyob rau hauv lub txee

GPS System: 7 Kauj Ruam

GPS System: 7 Kauj Ruam

GPS System: Tus Tsim Txoj Haujlwm: Carlos Gomez Kev muaj txoj hauv kev txhim kho kev ntseeg tau yog qhov tseem ceeb rau txhua tus neeg uas tab tom sim taug kev thiab tshawb nrhiav lub ntiaj teb. Qhov tseem ceeb tshaj plaws uas tso cai rau kev qhia ua haujlwm yog GPS muaj peev xwm ua rau sab hauv ntawm cov kab ke

7 Hlau Microphone Earbud rau 3.5mm TRS Jack Hloov: 4 Kauj Ruam

7 Hlau Microphone Earbud rau 3.5mm TRS Jack Hloov: 4 Kauj Ruam

7 Hlau Microphone Earbud rau 3.5mm TRS Jack Hloov: Kuv muaj Samsung qub pob ntseg uas siv lub mloog pob ntseg qub no uas qub dhau lawm. Li no kuv tau sim nws los ntawm kev hloov nws mus rau hauv TRS 3.5mm Jack. Nws muaj 7 xov hlau uas tsis yog li qhov kev txiav txim siab los ua Tus Qhia rau qhia qhov no yog kuv thawj zaug ua ib qho

Google Tsev Mod - Rau Hauv Xov Tooj Cua Vintage!: 13 Cov Kauj Ruam (nrog Duab)

Google Tsev Mod - Rau Hauv Xov Tooj Cua Vintage!: 13 Cov Kauj Ruam (nrog Duab)

Google Tsev Mod - Rau Hauv Xov Tooj Cua Vintage!: Nyob zoo txhua tus. Yog li … Kuv tau dhuav ib hnub, thiab nyob rau hnub ntawd kuv feem ntau tau txais hauv qhov kev cob qhia thiab muab ib yam dab tsi sib nrug. Kuv tus hluas nkauj ntxub nws. (Feem ntau nws los tsev thiab qee yam tau qhuav ntawm lub tshuab cua txias, lossis kuv tau pleev xim rau hauv av!) Lub sijhawm no kuv tus neeg raug tsim txom

RANDOM NEON LITES: 5 Kauj Ruam

RANDOM NEON LITES: 5 Kauj Ruam

RANDOM NEON LITES: Txoj haujlwm no tau tshoov siab los ntawm, "netzener". Kuv coj nws tus qauv tsim thiab muab ob npaug ntawm Neon Lamps los ntawm 5 txog 10, xaiv lub DC-off-the-shelf DC to DC Converter thiab tsim Cov Ntawv Luam Circuit Board uas tsis yog siv tes ua tes haujlwm. Qhov project no

Kev Koom Tes Ua Haujlwm Arduino: 9 Kauj Ruam

Kev Koom Tes Ua Haujlwm Arduino: 9 Kauj Ruam

Kev Koom Tes Ua Haujlwm Arduino: Hauv qhov kev qhia no peb yuav piav qhia peb li cas tsim thiab tsim kev sib koom tes game ‘ FUN ’

Encapsulating The Step Servo Motor With Serial Control Via Arduino Siv Lub Tshuab Luam Ntawv 3D - Pt4: 8 Cov Kauj Ruam

Encapsulating The Step Servo Motor With Serial Control Via Arduino Siv Lub Tshuab Luam Ntawv 3D - Pt4: 8 Cov Kauj Ruam

Encapsulating The Step Servo Motor With Serial Control Via Arduino Siv Lub Tshuab Luam Ntawv 3D - Pt4: Hauv qhov vis dis aus thib plaub ntawm Motor Step series, peb yuav siv yam peb tau kawm yav dhau los los tsim lub stepper servo motor nrog kev tswj ntawm kev sib txuas lus txuas thiab tiag txoj haujlwm tawm tswv yim siv tus tiv thaiv tus lej nkag los saib xyuas los ntawm Arduino. Hauv

DIY Cov Hluav Taws Xob Hluav Taws Xob Muaj Zog: 12 Cov Kauj Ruam

DIY Cov Hluav Taws Xob Hluav Taws Xob Muaj Zog: 12 Cov Kauj Ruam

DIY Cov Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob: Cov cua kub cua sov yog qhov tseeb tshaj plaws ntawm txoj kev ua kom sov cov khoom siv hlau tshwj xeeb tshaj yog cov hlau. Qhov zoo tshaj plaws txog qhov rhaub hluav taws xob no yog qhov koj tsis tas yuav muaj lub cev tiv tauj nrog lub hom phiaj kom sov. Muaj ntau ntau

LED Ntiv Nplhaib Los Ntawm Kev Siv Tsheb kauj vab ntug: 9 Kauj Ruam (nrog Duab)

LED Ntiv Nplhaib Los Ntawm Kev Siv Tsheb kauj vab ntug: 9 Kauj Ruam (nrog Duab)

LED Ntiv Nplhaib Los Ntawm Lub Tsheb Laij Teb Rov Los: Kev tshoov siab los ntawm Loek Vellkoop Cov Lus Qhia, Kuv tsis ntev los no tau txua me ntsis me me me me ntawm lub tsheb kauj vab kom pom txhua yam khoom siv uas kuv tuaj yeem siv tau los ntawm nws. Ib qho ntawm cov ntsiab lus uas ua rau kuv mob heev yog lub log log tom qab kuv tau tshem tag nrho cov lus hais tawm. Khoom

Hugging Robot: 5 Kauj Ruam

Hugging Robot: 5 Kauj Ruam

Hugging Robot: Tsis muaj dab tsi zoo dua li puag thaum koj xav tias kho siab. Qhov Arduino powered neeg hlau ua tiav qhov kev xav tau no yam tsis xav tau tib neeg