automatic night lamp 230v


Posted on Feb 5, 2014

Here is a project of a simple automatic night lamp circuit or dark activated 230V lamp circuit, which will automatically activate an AC lamp / bulb when sun set or if the circuit will receive no light. The circuit is very easy to build using no more than five components. The LDR is working as a light/dark sensor and SCR is working as a switch. Whe


automatic night lamp 230v
Click here to download the full size of the above Circuit.

n light falls on the LDR its resistance will decrease and the SCR will remain in the off condition but when the LDR will receive no light its resistance increases which will switch on the SCR and 230V AC voltage will start passing through the SCR which will power on the 230V lamp. The sensitivity of the circuit can be adjusted with 4. 7M variable resistor. Note: Many of its points are at AC mains voltage. It could give you lethal shock if you are not careful. If you don`t know much about working with AC line voltages do not attempt to construct this circuit.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    SmartCard adapter / interface for PC
    Ir Detector
    Serial COM port using ATmega8
    LED Drivers/LCD Bias
    Radio Jammer
    ISL43485 3.3V Half Duplex 30Mbps RS-485/RS-422 Transceiver
    Obstacle Avoiding Robot without microcontroller
    Tube mic Connecting the capsule 2
    USB Operated Home Appliances



    Top