Near Intersection of I-35 & I-90 Southern Mn. | I would suggest connecting the Ag Leader to a loose battery and not to the Hagie for a test. You may need to connect the negative terminals of the two batteries together but of course not the positive terminals. That way the Ag Leader will be running off the loose battery and the Hagie off of its original layout but they will have a common ground.
When working with microcontrollers with two different power sources it is usually necessary to have a common ground like that.
I'm surprised your Hagie which is older than mine uses PWM while mine uses a servo. I'm well aware that Hagie made several changes through the years. |