Tuesday, 7 October 2014

light dependent switching system, / automatic street light,/light controlled automatic switch on/off system,



Thank you reader for coming again,

Today’s project –light dependent switching system, / automatic street light,/light controlled automatic switch on/off system,

Basic idea  -     a light which gets on at night time and gets off at day time, depending on sunlight.

Theory-here a transistor acts as a switch, varying bias current using LDR and variable resistor, we make the transistor switch on and switched off mode,

Components required- any n-p-n transistor, a LDR, some resistances, one LED,

Circuit diagram-see the diagram given bellow


Controlling light sensitivity- by varying the resistance of the variable resistor, we can control the light sensitivity,
 The circuit I made- see the picture bellow