In this tutorial we will make a dark detector circuit using BC547 transistor.
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Step 1: Working:
when LDR will detect dark then LED start glowing automatic and when LDR will detect light LED goes off.
Step 2: Components Required:
- 1 x BC547 transistor
- 1 x LDR
- 1 x 330ohm resistor
- 1 x 100k ohm resistor
- 9V battery
Step 3: Connection:
Connect the all components according to above circuit diagram.