kishorekumar:
i connected pin number 1 to 11 in Arduino, and 8 to 5V in Arduino respectively . when i change the value in analogWrite there is no change in output speed, the motor kept running even i changed the value to "0".
You connect pin 1 (Enable 1) of the L293D to Pin 11 of the Arduino.
You connected pin 8 (Vs) of the L293D to +5 of the Arduino.
How are the other 14 pins connected?