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 ...
21.1K views1 month ago
Shorts
NDMA Tests Cell Broadcast Alert System | Why Did Your Phone Suddenly Beep Today? | How Does It Work
2:24
9.5K views
NDMA Tests Cell Broadcast Alert System | Why Did Your Phone Suddenly Beep
Unacademy IAS: English
Air Raid Siren Sound Effect 🚨 Realistic Emergency Warning (1:20)
1:21
47.3K views
Air Raid Siren Sound Effect 🚨 Realistic Emergency Warning (1:20)
harathomsc
Best Alarm Clocks
10 Best Alarm Clock 2026 ⏰ Smart, Loud & Sunrise Clocks Compared!
6:47
10 Best Alarm Clock 2026 ⏰ Smart, Loud & Sunrise Clocks Compared!
YouTubeTop Rating & Reviews
39 views1 month ago
Top 5 Best Alarm Clocks in 2026
8:39
Top 5 Best Alarm Clocks in 2026
YouTubereview expert
4 views4 weeks ago
✅Top 5: Best Alarm Clocks in 2026 Reviews - (watch before you buy)
7:07
✅Top 5: Best Alarm Clocks in 2026 Reviews - (watch before you buy)
YouTubeGadget Gear
82 views1 month ago
Top videos
The FIRE ALARM Alarm Clock! | The LOUDEST Alarm Clock Ever! ⏰
0:33
The FIRE ALARM Alarm Clock! | The LOUDEST Alarm Clock Ever! ⏰
YouTubeS.E.R. Safety
26K views1 month ago
iOS Alarm Sound Evolution #apple #iphone #ios #alarm #sound #evolution
0:51
iOS Alarm Sound Evolution #apple #iphone #ios #alarm #sound #evolution
YouTubeTabTUNE
294.9K views1 month ago
CO2 Fire Suppression Pull Station Activation!
2:05
CO2 Fire Suppression Pull Station Activation!
YouTubeS.E.R. Safety
20.1K views1 month ago
Funny Alarm Pranks
funny Meme Videos ll #funny #memes #funnyreels1400+
0:10
funny Meme Videos ll #funny #memes #funnyreels1400+
YouTubeFunny Reels 1400+
4 views1 month ago
😂FUNNY SHORT EPIC FAIL🫠 #shorts
0:18
😂FUNNY SHORT EPIC FAIL🫠 #shorts
YouTubeFun Info
1.8K views1 month ago
Is this REALLY his sister's fault???
0:55
Is this REALLY his sister's fault???
YouTubeAmerica's Funniest Home
146.5K views3 weeks ago
The FIRE ALARM Alarm Clock! | The LOUDEST Alarm Clock Ever! ⏰
0:33
The FIRE ALARM Alarm Clock! | The LOUDEST Alarm Clock Ever! ⏰
26K views1 month ago
YouTubeS.E.R. Safety
iOS Alarm Sound Evolution #apple #iphone #ios #alarm #sound #evolution
0:51
iOS Alarm Sound Evolution #apple #iphone #ios #alarm #sound #evol…
294.9K views1 month ago
YouTubeTabTUNE
CO2 Fire Suppression Pull Station Activation!
2:05
CO2 Fire Suppression Pull Station Activation!
20.1K views1 month ago
YouTubeS.E.R. Safety
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…
9.5K views1 month ago
YouTubeUnacademy IAS: English
Air Raid Siren Sound Effect 🚨 Realistic Emergency Warning (1:20)
1:21
Air Raid Siren Sound Effect 🚨 Realistic Emergency Warning (1:20)
47.3K views1 month ago
YouTubeharathomsc
How Many Alarms Do You Really Set?
1:14
How Many Alarms Do You Really Set?
78.1K views2 weeks ago
TikTokredsox
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…
34.3K views1 month ago
YouTubeUnacademy IAS: English
0:12
Alarm Clock in 1626 vs 2026 #shorts #alarm #history
31M views1 month ago
YouTubeOmnik
0:07
How To Make Rain Detector Project|| Easy Sciece Project #science #di…
35.5K views1 month ago
YouTubeMr. Deeps
0:13
Water Glass Level Indicator with LED & Buzzer System ❤️💡❤️ #w…
127.9K views1 month ago
YouTubeScience Ideas 101
0:16
RED ALERT 🚨 न्यूक्लियर सायरन (Nuclear Siren) | इमरजेंसी चेत…
43.5K views1 month ago
YouTubeharathomsc
0:10
🔔 Portable door alarms for travel - Portable Wireless Alarm Door Sto…
151.7K views1 week ago
YouTubeMaviGadget
0:18
wakeup.kassper — morning alarm sound and wake-up tips
243.2K views2 weeks ago
TikToklowkeythiistory
1:01
Changer sonnerie iPhone 🔥🤍🤙 #pourtoisenegal #videoviral #abon…
21.7K views2 weeks ago
TikTokrassoul_joopeuh1
1:01
If Apple Alarm Sounds Could Dance: A Fun Exploration
14.7M views3 months ago
TikTokbrettneyspears
1:50
Man Bypasses Cameras, Lasers & Vault Alarm: Ingenious Heist Tactics
5.9M views1 month ago
TikTokkangaroo_talk2
0:04
Fire detector #shorts #scienceproject #experiment #ele…
1.7M views1 month ago
YouTubeTech Ideas
0:05
Maior falta de respeito do mundo #fyp #alarme | Alarmas Para Desp…
3.5M views1 month ago
TikTokdanieuuu_
0:32
Arda Saatçi Mindset: Disziplin & Wecker
1.5M views3 weeks ago
TikTokmilenawakeup
See more videos
Static thumbnail place holder