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YouTubeMK Smart creations
how to make a simple laser security alarm | amazing science project | thief detection alarm
components list Mini Breadboard - https://amzn.to/3W0jeHZ 10k ohm resistor - https://amzn.to/46EkwiF LED - https://amzn.to/3X8eIbO LDR - https://amzn.to/3xSJr2Y hw battery with clip - https://amzn.to/41W2Gpc buzzer - https://amzn.to/3XWT7UM bc 547 transistor - https://amzn.to/3xVBvhr laser light - https://amzn.to/3VVxqmo optional tools glue gun ...
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