Hi .
i want to use h-bridge for
running a motor only in one direction and witn no pwm.
i don't want to waste digital outputs.
i want to use only one digital output
can i wire it as follows?
it is not working
can u advice?
Probably as there is something you did not connect that you need to.
But as your diagram is illegible, I have no way of knowing. 
H-bridge is not required. A logic-level MOSFET can be used for example IRLZ44. A flyback diode such as 1N4001 will also be needed. A pull-down resistor on the Arduino pin will prevent any momentary movement of the motor at startup.
You are showing the driver board needing 3 digital outputs.
2 for direction control and 1 for PWM speed control.
Hi thank u for your reply
i didnt mention that i am using the other output for another motor with direction and pwm control.
Now i need additional motor. So i want to utilize the other output but i dont want to "spend" 3 digital outputs
This should be easy. In3 & In4 should be connected to 5V and 0V in some combination and the arduino pin can control EnB.
Thank u for replying
since i use the motor in 1 direction only so i can hold the IN1 and the IN2 at constant values.
IN1 can be HIGH constant
IN2 can be LOW constant
( or vice versa depend in rotation direction)
the only value i am changing is the ENA input
This will be changed :once HIGH and once LOW
so i am asking :
if i need constant HIGH , why shuoldn't i use the 5V as constant HIGH for IN3
same for constant LOW , why sholdn't i use the GROUND of the arduino as constant LOW for IN4
and only for the ENA terminal i will use one digital output
regards
Thank u every body for your attention
I did as PaulRB suggested and it works
i did the same before and it didn't .
u were so determined that it should , so
i tested a brand bew H-BRIDGE and it works!!!