LDR Sensor Alarm Circuit | Simple & Clear Explanation
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YouTubeTechJourneyHub
LDR Sensor Alarm Circuit | Simple & Clear Explanation
🌟 LDR Sensor Alarm Circuit | Simple & Clear Explanation This video demonstrates how to build a light-activated alarm circuit using an LDR on a breadboard. You’ll see the full setup using a BC547 transistor, LDR, 1K resistor, and buzzer — all shown step-by-step with clean visuals. 🎧 No voice-over — the tutorial is completely visual ...
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LDR Sensor Circuit
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