Laser sensible circuit

153

01:43:35

Consider the resistor with value 30 k as an LDR , LDR has a property when light falls on it, it's resistance decreases otherwise it's around 30-40 kohms.when laser falls on ldr it resistance decreases and the led stop working. 
Note :decrease the value of 30k resistor to around 30-40 ohm to see the led stop glowing.

published 10 years ago

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