555 Timer Laser Alarm Security Circuit @ThomasKim
555 Timer Laser Alarm Security Circuit  @ThomasKim
Uploaded May 2017 | Updated September 2026, 2 hours ago
This is a laser alarm security circuit using 555 timer IC.
You can adjust alarm time. (after laser beam restored)
The schematic is in the video.

555 타이머 IC 를 이용한 레이저 알람 회로입니다.
(레이저가 복구된 후) 알람 시간을 조절할 수 있습니다.
회로도는 영상에 등장합니다.
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Thomas Kim |

555 Timer Laser Alarm Security Circuit

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