Today we construct again the circuit with changing the resistor value of R2 with 1M ohm...Then the value of voltage diode, LDR, Led, pin5, pin7, pin3 and pin2 are record after the circuit work...We can see the changing of wave after LED is ON and the wave back to normal when Led is OFF..
Then we move the circuit on copper board and solder it...After solder the component on board we test it again to make sure it work properly...
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