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Starter Project kit for DIY Mini Laser Security System 1LDR / BC547/ Mini Buzzer 5v /1.5v Battery/Mini breadboard / 4cell Battery Holder/Laser : : Industrial & Scientific

Starter Project kit for DIY Mini Laser Security System 1LDR / BC547/ Mini Buzzer 5v /1.5v Battery/Mini breadboard / 4cell Battery Holder/Laser : : Industrial & Scientific

Starter Project kit for DIY Mini Laser Security System 1LDR / BC547/ Mini Buzzer 5v /1.5v Battery/Mini breadboard / 4cell Battery Holder/Laser : : Industrial & Scientific