Light sensor circuit







Single chip metal detector circuit
































Street light switch circuit


Water level alarm circuit









Transistor


Battery full



Clap switch 



Diagram 6w of  500w inverter









Blinking Led


Pin arrangement of Transistor



LM317 volt virt



Low battery indicator circuit using IC 555


Rain alarm



Street light auto



Temperature Sensor



12V Solar battery charger circuit


Toch on of swich


Transformer 



Types of current




Voice sound activated LED flashing circuit








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