blackhawk85:
You asked for both power supplies and as you notice in the schematic figure i only have 1 power supply !
Below.... you wrote....
blackhawk85:
2) Receiver "NRF24L01" with 1 servo and H-bridge L298n + DC motor all connected to arduino nano (power supply 9v) which works very well with 9v. Now the issue in this module if i extend the power supply to 12V
9V and 12V .... that's two power supplies. Two individual power supplies. Your post indicated that everything works very well with the 9V supply. But you also said that when you used the 12V supply (instead of the 9V supply) ..... then that's when things did not work. Right?
Additionally, when you wrote everything works 'very well' with the 9V supply, then why are you now changing the story to some issue with forward and reverse control? This just means..... get your story together. Otherwise, if the situation is different from your original story, then attempt to indicate it.
Also .... you still haven't provided required details about the power supplies you're using ... voltage rating and current rating, power rating etc.