http://playground.arduino.cc/Code/Buttons
can anyone tell me how to use it(please give some examples of how to )

i mean, setCursor(50,0) that means, its the 51th (virtual) block

so how do i set the cursor to something like 50 ?

i dont understand y i should use a mosfet

please enlighten me

i need to sroll right or left with my custom characters.

i mean, is it possible to set cursor at a value more than 15(in a 16X2 lcd )?

suppose my lcd is filled with some text, when it scrolls left , i can see the custom characters appearing.

it was around 20 $

is it worth it?

the thing is, i cant tell you the motor details
im even just testing my luck when i say it runs at 9v :/

i went to a shop and saw a touch screen sensor ,2.5 inch

it had maybe 7-8 wires coming off it
i wannt to know, if i can connect it to my arduino
(it looked like those replacement touch screen sensors for mobiles)

so which transistor SHOULD i use ?

and, will the TIP122 be best for it?
(i need the motor to STOP, so no noise !)

na, i got it
thnx for the help,

but tell me

will 4 wire , will it be even compatible with arduino?

i went to a shop to search for some sort of a distance mesuring sensor(for collision detection &prediction)

the guy showed me a long rod-like device(had metal covering)
i noticed that it had 2 leds in the front[and , as far as i remember, it had 4 wires coming out of it ]

it was priced at about $20


so, i need to know, will that be of any use in making a collision detectin device(it should ping at say, a feet from the sensor )?

btw

in that link , its written 2.2 K ohm
is that correct?

i mean, isnt 2K ohms a lot of resistance?
shouldnt it be more like 220 ohms ? 


and as for that transistor, i will draw a schematic to show you what i mean

i have been thinking about it

whats the point of having 4 transistors in an H-Bridge?
i mean, wont i be able to reverse, foward and stop a motor using just two transistors?

Code:

#define fadePin 9

void setup(){
  pinMode(fadePin, OUTPUT);
}

void loop(){

  for(int i = 0; i<360; i++){
    //convert 0-360 angle to radian (needed for sin function)
    float rad = DEG_TO_RAD * i;

    //calculate sin of angle as number between 0 and 255
    int sinOut = constrain((sin(rad) * 128) + 128, 0, 255);

   
    analogWrite(fadePin,sinOut);
if(sinOut==0)
delay(200);
    delay(15);
  }

}

im 100% sure that the code is not wrong(its too basic to go any wrong !)