5 to 500 feet transmitter Circuit Schematic With Explnation

This is so useful circuit because this circuit can transmit signals 5 feet to 500 feet.Here I have used common transistor 2N5225 If you are unable to find this you can use any general purpose transistor.



Note

# About L1 is mentioned on the picture

# This circuit operates with 9V DC

# use 5cm wire as an antenna