How to make LDR Dark Sensor Simple DIY Circuit
This Post only for demonstrate how a #LDR work and using a single #LDR and #Transistor make dark detection sensor .. Its easier to make a Security alarm project from this circuit. Very recent I'll share similar project with this circuit. Components For Dark Sensor Circuit Requirement Components: 1. transistor BC547 2. LDR (Light Dependent Register ) 3. LED 4. 3 Register 10k Ohm 2x + 18k Ohm 1x 5. 9v Battery + battery Clip (You can use less or more then 9v , just need to change Resister with battery voltage. i prefer battery voltage should be between 6-12v). 6. some wires . normally use jumper cables. Circuit Diagram: Circuit Diagram For Dark Sensor Circuit How Diagram Work: BC547 NPN transistor is most use full and Cheap Electronic component with have 3 pins Emitter,Base and collector, when supply current through this transistor for base and collector current emitter flow current while base emitter disc...