Hi Guys,
I am currently working with a 9-pin Roboteq DC Motor Driver and I want to connect the driver to the Arduino to receive PWM signals. I know that the Roboteq Driver takes RS232 and that the Arduino is in TTL. How would I be able to send my PWM signals directly to this motor driver and make the motors spin given that my code is uploaded on the Ardunio?
Check that the driver actually uses RS232 levels. Almost nothing produced nowadays (particularly outside of industrial stuff) that uses serial actually uses the +10v/-10v of real RS232. Almost everything serial is 5v, or sometimes 3.3.
If it uses TTL levels, just connect to tx/rx. If it needs RS232 levels, you'll need something like a MAX232 to shift the levels from TTL to RS232.