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DIY Security Laser Alarm System Pro…

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Simple Laser Security Alarm Circuit | Alarme
0:56
youtube.com > Sandy Tantoy
How to make DIY LASER SECURITY ALARM
YouTube · Sandy Tantoy · 33 次播放 · 2023年5月12日
3:07
YouTube > TechEasyZone
Working Explanation of 'Laser Light Security Alarm' Circuit
YouTube · TechEasyZone · 3.3万次播放 · 2016年12月15日

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YouTube > KMC electronics
How to make a laser light security alarm system. Know more creative |
YouTube · KMC electronics · 7.4万次播放 · 2020年3月21日
4:07
YouTube > How to Raju
How to Make a Mini Laser Security Alarm System using BC547 - DIY
YouTube · How to Raju · 9456 次播放 · 2018年8月14日

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