Laser Security System using BC547 Transistor and LDR #security #diy
0:15
YouTubeTeknoTrek
Laser Security System using BC547 Transistor and LDR #security #diy
In this video, I’ve built a simple laser security alarm using a BC547 transistor, LDR, buzzer, and a 3.7V battery. When the laser beam is interrupted or blocked, the buzzer instantly turns ON, activating the alarm system. This is an easy DIY electronics project for beginners to understand how LDR sensors and transistors work together. Perfect ...
已浏览 2.1万 次1 个月前
短视频
Alarm Clock in 1626 vs 2026 #shorts #alarm #history
0:12
已浏览 3097.6万 次
Alarm Clock in 1626 vs 2026 #shorts #alarm #history
Omnik
Why Did Your Phone Suddenly Beep Today? NDMA Tests Cell Broadcast Alert System | Chethan N
0:53
已浏览 3.4万 次
Why Did Your Phone Suddenly Beep Today? NDMA Tests Cell Broadcast
Unacademy IAS: English
Arduino Keypad Lock
Learn Arduino by practicing in this simulator 🎁
0:25
Learn Arduino by practicing in this simulator 🎁
YouTubeAutomatismosMundo
已浏览 15.8万 次1 个月前
DIY Arduino Desktop Control Station: Modulino & Nano R4
0:30
DIY Arduino Desktop Control Station: Modulino & Nano R4
TikTokofficialarduino
已浏览 2723 次1 个月前
DIY Wireless Arduino Project | Using CH‑05 Bluetooth Module #automobile #arduino #iot
0:24
DIY Wireless Arduino Project | Using CH‑05 Bluetooth Module #automobile #arduino #iot
YouTubeCreative SM
已浏览 3万 次1 个月前
热门视频
NDMA Tests Cell Broadcast Alert System | Why Did Your Phone Suddenly Beep Today? | How Does It Work
2:24
NDMA Tests Cell Broadcast Alert System | Why Did Your Phone Suddenly Beep Today? | How Does It Work
YouTubeUnacademy IAS: English
已浏览 9484 次1 个月前
CO2 Fire Suppression Pull Station Activation!
2:05
CO2 Fire Suppression Pull Station Activation!
YouTubeS.E.R. Safety
已浏览 2万 次1 个月前
How Fire Detection System Works 🔥🚨 #shorts
0:10
How Fire Detection System Works 🔥🚨 #shorts
YouTubeScrap to snap
已浏览 3.8万 次1 个月前
DIY Arduino Projects
Technologia… Construction Edition 😂 No Tools. Just Genius.
1:00
Technologia… Construction Edition 😂 No Tools. Just Genius.
YouTubeMister Twist
已浏览 623.2万 次1 个月前
*VIRAL* Fish Keychain🐟🧡 | Diy |#shorts #diy #viral #trending #craft #art #artideas #youtubeshorts
0:54
*VIRAL* Fish Keychain🐟🧡 | Diy |#shorts #diy #viral #trending #craft #art #artideas #youtubeshorts
YouTubenamiraartgallery
已浏览 4.9万 次1 周前
Mini handpump water science project with purple concrete,,mixer diytractor cowfarm #.545 #shorts 🔥🔥
0:31
Mini handpump water science project with purple concrete,,mixer diytractor cowfarm #.545 #shorts 🔥🔥
YouTubeDIY MINI TRACTOR
已浏览 2.3万 次1 周前
NDMA Tests Cell Broadcast Alert System | Why Did Your Phone Suddenly Beep Today? | How Does It Work
2:24
NDMA Tests Cell Broadcast Alert System | Why Did Your Phone Sud…
已浏览 9484 次1 个月前
YouTubeUnacademy IAS: English
CO2 Fire Suppression Pull Station Activation!
2:05
CO2 Fire Suppression Pull Station Activation!
已浏览 2万 次1 个月前
YouTubeS.E.R. Safety
How Fire Detection System Works 🔥🚨 #shorts
0:10
How Fire Detection System Works 🔥🚨 #shorts
已浏览 3.8万 次1 个月前
YouTubeScrap to snap
Alarm Clock in 1626 vs 2026 #shorts #alarm #history
0:12
Alarm Clock in 1626 vs 2026 #shorts #alarm #history
已浏览 3097.6万 次1 个月前
YouTubeOmnik
Why Did Your Phone Suddenly Beep Today? NDMA Tests Cell Broadcast Alert System | Chethan N
0:53
Why Did Your Phone Suddenly Beep Today? NDMA Tests Cell Broadca…
已浏览 3.4万 次1 个月前
YouTubeUnacademy IAS: English
How Many Alarms Does It Take To Break An IPhone? #shortsfeed
0:39
How Many Alarms Does It Take To Break An IPhone? #shortsfeed
已浏览 3.2万 次1 个月前
YouTubeZ-ZekLegacy
Fire Detection System Using IR Sensor | Easy Electronics Project #techshorts#dilveersingh
0:13
Fire Detection System Using IR Sensor | Easy Electronics Project …
已浏览 1.5万 次1 个月前
YouTubeEC short lab
0:07
How To Make Rain Detector Project|| Easy Sciece Project #science #di…
已浏览 3.5万 次1 个月前
YouTubeMr. Deeps
0:51
iOS Alarm Sound Evolution #apple #iphone #ios #alarm #sound #evol…
已浏览 29.5万 次1 个月前
YouTubeTabTUNE
0:29
Essential CO Detector for Home Safety
已浏览 60.3万 次1 个月前
TikToksenvok.family.care
1:21
Air Raid Siren Sound Effect 🚨 Realistic Emergency Warning (1:20)
已浏览 4.7万 次1 个月前
YouTubeharathomsc
0:04
Fire detector #shorts #scienceproject #experiment #ele…
已浏览 166万 次1 个月前
YouTubeTech Ideas
1:02
Top 5 Apple Alarms for Dancing
已浏览 24.2万 次1 个月前
TikTokbrettneyspears
0:35
3 Cool Alarm Clocks That Will Blow Your Mind 💥 #shorts #alarm #viral
已浏览 2.6万 次1 个月前
YouTube2X GADGETS PRO
0:27
🚨 National Emergency Alert Issued – Stay Safe #funny
已浏览 2.5万 次1 个月前
YouTubeRohitSharma9251
0:13
Water Glass Level Indicator with LED & Buzzer System ❤️💡❤️ #w…
已浏览 12.8万 次1 个月前
YouTubeScience Ideas 101
1:14
How Many Alarms Do You Really Set?
已浏览 7.8万 次3 周前
TikTokredsox
0:33
The FIRE ALARM Alarm Clock! | The LOUDEST Alarm Clock Ever! ⏰
已浏览 3.4万 次1 个月前
YouTubeS.E.R. Safety
1:16
Government Emergency Alert 🔔 Why Your Phone Suddenly Rang? | Cel…
已浏览 4.7万 次1 个月前
YouTubeLet's Crack UPSC CSE Hindi
观看更多视频
静态缩略图占位符