Arduino UNO simple experiments

 This was my first arduino project; it was really a very big success for me in the field of electronics, Actually many guys did not have any idea to develop any best microcontroller based project, because they confused to decide which microcontroller to be used which programmer to used, also they confused about the programmer software, by using the arduino board you didn’t have to worry about the Microcontroller selection, programming software etc., you have only to develop the program, it will be compile the program burn the microcontroller & show they result , every  electronic engineer  should have  experience in the field of microcontroller , because many of electronic circuits can be developed by using microcontroller , in my this simple project I try to write the codes to show some thing on the screen,   you can configure any pin , but here I used arduino pins  2,3,4,5,11,12 & LCD pins are 14,13,12,11,6,4 were used,

• LCD RS pin to digital pin 12
• LCD Enable pin to digital pin 11
• LCD D4 pin to digital pin 5
• LCD D5 pin to digital pin 4
• LCD D6 pin to digital pin 3
• LCD D7 pin to digital pin 2

FM Transmitter circuit

FM transmitter having a stable frequency & with a high power (Range) is a tough task to do , actually you can buy a high power FM transmitter , but hard to make it due to the restriction as well as parts availability in the certain areas , in my this circuit the input were taken from the Car MP3 modulator , antenna point at the PCB can be easily found , where they always printed the every point on the PCB , if not found the antenna point then you can use the field strength  meter  (FSM) , antenna will be the peak FSM reading , this signal were then given to the circuit , sometime the RF power from the MP3 found low which cannot derive the  first transistor , for this biasing required from positive supply to the transistor base to boost some hove the input signal , 30 k to 56 k resistor can be used for the biasing ,in first stage I used 2sc2407 transistor ,in the other next stages both 2sc3950 were used , very cheap transistors ,where all these transistor can work very nice in the FM range, RFC were used at the transistor collector which can be easily available in the market  RFC for FM rage will be 0.56 mh  or 0.68 mh (Micro henry)  you don’t have to wound the coil , you can use 2N2219 , 2N3866, 2N2222 instead 2sc2407 , instead of 2sc3905 , you can use 2sc1971 , 2n3553 etc.