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
How to Set an Online Alarm Clock
Embedding a Countdown Timer on my Canvas Page
3:55
Embedding a Countdown Timer on my Canvas Page
YouTubeMarc Hermon
2.4K viewsAug 31, 2022
How to Set an Alarm on a Windows 10 Computer
1:00
How to Set an Alarm on a Windows 10 Computer
YouTubeHOWZA
35K viewsDec 23, 2017
Setting your Mechanical Timer for Your Indoor Garden
2:53
Setting your Mechanical Timer for Your Indoor Garden
YouTubeJust Vertical
526.2K viewsNov 27, 2022
Shorts
How to Make a Security System 🔐 | Simple Alarm Circuit (Easy DIY!)
0:56
37K views
How to Make a Security System 🔐 | Simple Alarm Circuit (Easy DIY!)
Energy Tricks
Alarm Clock in 1626 vs 2026 #shorts #alarm #history
0:12
31M views
Alarm Clock in 1626 vs 2026 #shorts #alarm #history
Omnik
Top videos
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
9.5K 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
How Fire Detection System Works 🔥🚨 #shorts
0:10
How Fire Detection System Works 🔥🚨 #shorts
YouTubeScrap to snap
38.1K views1 month ago
Best Free Online Alarm Clocks
Best Alarm Clock App for HEAVY SLEEPERS! Sleepwave
9:11
Best Alarm Clock App for HEAVY SLEEPERS! Sleepwave
YouTubeBlaze2K
163.6K viewsSep 21, 2022
THE BEST ALARM CLOCK!
18:23
THE BEST ALARM CLOCK!
YouTubeWhatcha Got There!
10.5K viewsJan 25, 2022
Best Alexa Wake Up Routines - How to set Wake Up Alarm with Alexa 2021
10:45
Best Alexa Wake Up Routines - How to set Wake Up Alarm with Alexa 2021
YouTubeLife Automated
70.2K viewsFeb 18, 2021
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
9.5K views1 month ago
YouTubeUnacademy IAS: English
CO2 Fire Suppression Pull Station Activation!
2:05
CO2 Fire Suppression Pull Station Activation!
20.1K views1 month ago
YouTubeS.E.R. Safety
How Fire Detection System Works 🔥🚨 #shorts
0:10
How Fire Detection System Works 🔥🚨 #shorts
38.1K views1 month ago
YouTubeScrap to snap
How to Make a Security System 🔐 | Simple Alarm Circuit (Easy DIY!)
0:56
How to Make a Security System 🔐 | Simple Alarm Circuit (Easy DIY!)
37K views1 month ago
YouTubeEnergy Tricks
Alarm Clock in 1626 vs 2026 #shorts #alarm #history
0:12
Alarm Clock in 1626 vs 2026 #shorts #alarm #history
31M views1 month ago
YouTubeOmnik
How Many Alarms Does It Take To Break An IPhone? #shortsfeed
0:39
How Many Alarms Does It Take To Break An IPhone? #shortsfeed
31.5K views1 month ago
YouTubeZ-ZekLegacy
iOS Alarm Sound Evolution #apple #iphone #ios #alarm #sound #evolution
0:51
iOS Alarm Sound Evolution #apple #iphone #ios #alarm #sound #evolution
294.9K views1 month ago
YouTubeTabTUNE
0:13
Fire Detection System Using IR Sensor | Easy Electronics Project #techshorts#dilveersingh
15K views1 month ago
YouTubeEC short lab
0:07
How To Make Rain Detector Project|| Easy Sciece Project #science #diy #shorts
35.5K views1 month ago
YouTubeMr. Deeps
0:53
Why Did Your Phone Suddenly Beep Today? NDMA Tests Cell Broadcast Alert System | Chethan N
34.3K views1 month ago
YouTubeUnacademy IAS: English
1:21
Air Raid Siren Sound Effect 🚨 Realistic Emergency Warning (1:20)
47.3K views2 months ago
YouTubeharathomsc
0:22
i'm awake but at what cost 💀 #wakio #wakioalarm #sleeping #alarm | alarm
306.2K views2 weeks ago
TikTokkuyajp.wakio
1:01
Changer sonnerie iPhone 🔥🤍🤙 #pourtoisenegal #videoviral #abonnetoi #videos #partage @@ @𝓡𝐀ŜŜ𝐎υⓁ 𝓳𝐎𝐎ρ𝒆υｈ⍟ @𝓡𝐀ŜŜ𝐎υⓁ 𝓳𝐎𝐎ρ𝒆υｈ⍟ @𝓡𝐀ŜŜ𝐎υⓁ 𝓳𝐎𝐎ρ𝒆υｈ⍟
21.7K views2 weeks ago
TikTokrassoul_joopeuh1
0:05
Maior falta de respeito do mundo #fyp #alarme | Alarmas Para Despertar
3.5M views1 month ago
TikTokdanieuuu_
2:57
🚨🚨🚨ALERTA🚨🚨🚨 #comedia #backdoorhumor | alarm saying front door
2.3M views1 month ago
TikTokbackdoor_humor
1:15
Compactible con la mayoría de vehículos americanos #luchitopineda52 #seguridad #alarams #chevrolet #gmc @Transformers Car audio
37.4K views2 weeks ago
TikTokluchitopineda52
0:11
This alarm app actually work tho😭#alarmclock #snoozing #productivity #morningperson
10.4K views2 weeks ago
TikTokwakeup.by.bri
1:50
Man Bypasses Cameras, Lasers & Vault Alarm: Ingenious Heist Tactics
5.9M views1 month ago
TikTokkangaroo_talk2
0:32
Arda Saatçi Mindset: Disziplin & Wecker
1.5M views3 weeks ago
TikTokmilenawakeup
See more
Static thumbnail place holder

Short videos

0:15
Laser Security System using BC547 Transistor and LDR #security #diy
21.1K views1 month ago
YouTubeTeknoTrek
2:24
NDMA Tests Cell Broadcast Alert System | Why Did Your Phone Suddenly Beep Today?
9.5K views1 month ago
YouTubeUnacademy IAS: English
2:05
CO2 Fire Suppression Pull Station Activation!
20.1K views1 month ago
YouTubeS.E.R. Safety
0:10
How Fire Detection System Works 🔥🚨 #shorts
38.1K views1 month ago
YouTubeScrap to snap
0:56
How to Make a Security System 🔐 | Simple Alarm Circuit (Easy DIY!)
37K views1 month ago
YouTubeEnergy Tricks
0:12
Alarm Clock in 1626 vs 2026 #shorts #alarm #history
31M views1 month ago
YouTubeOmnik
0:39
How Many Alarms Does It Take To Break An IPhone? #shortsfeed
31.5K views1 month ago
YouTubeZ-ZekLegacy
0:51
iOS Alarm Sound Evolution #apple #iphone #ios #alarm #sound #evolution
294.9K views1 month ago
YouTubeTabTUNE
0:13
Fire Detection System Using IR Sensor | Easy Electronics Project
15K views1 month ago
YouTubeEC short lab
0:07
How To Make Rain Detector Project|| Easy Sciece Project #science #diy #shorts
35.5K views1 month ago
YouTubeMr. Deeps
0:53
Why Did Your Phone Suddenly Beep Today? NDMA Tests Cell Broadcast Alert System |
34.3K views1 month ago
YouTubeUnacademy IAS: English
1:21
Air Raid Siren Sound Effect 🚨 Realistic Emergency Warning (1:20)
47.3K views2 months ago
YouTubeharathomsc
0:22
i'm awake but at what cost 💀 #wakio #wakioalarm #sleeping #alarm | alarm
306.2K views2 weeks ago
TikTokkuyajp.wakio
1:01
Changer sonnerie iPhone 🔥🤍🤙 #pourtoisenegal #videoviral #abonnetoi #videos #partage
21.7K views2 weeks ago
TikTokrassoul_joopeuh1
0:05
Maior falta de respeito do mundo #fyp #alarme | Alarmas Para Despertar
3.5M views1 month ago
TikTokdanieuuu_
2:57
🚨🚨🚨ALERTA🚨🚨🚨 #comedia #backdoorhumor | alarm saying front door
2.3M views1 month ago
TikTokbackdoor_humor
1:15
Compactible con la mayoría de vehículos americanos #luchitopineda52 #seguridad
37.4K views2 weeks ago
TikTokluchitopineda52
0:11
This alarm app actually work tho😭#alarmclock #snoozing #productivity #morningperson
10.4K views2 weeks ago
TikTokwakeup.by.bri
1:50
Man Bypasses Cameras, Lasers & Vault Alarm: Ingenious Heist Tactics
5.9M views1 month ago
TikTokkangaroo_talk2
0:32
Arda Saatçi Mindset: Disziplin & Wecker
1.5M views3 weeks ago
TikTokmilenawakeup
Static thumbnail place holder