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The Light alarm utilizes a LDR That Triggers the BC557 PNP Transistor.When triggered by light the circuit will buzz for a pre-detirmined time. 9-12Vdc
DC-DC BUCK CONVERTER LM2596S STEP-DOWN MODULE
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EFK 12000 Just Whistle
EFK 12001 Infra -Red Link
EFK 12002 Infra -Red Remote Control
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