Hi Jeff
Agree.
But what I pointed out was that all the drivers I tried (not all available obviously) that used the technique of selecting IN 1 and IN 2 for direction and applied PWM to the Enable pin would not start up slowly from standstill. When the PWM duty cycle is increased the motor would start with a rush at about 25% full speed then it could be slowed.
I just thought that Geoff might want to start his trains very slowly at different stages and should be aware of what could happen.
I did start a thread about this a few years ago now and offered to go into detail with oscilloscope pics but it generated no interest at all so I figured everybody knew about it and I dropped it.
This came up a few days ago and I offered an abridged description so I will not go into it again. The thread appears here
DC Motor datasheet
11 days ago.
I describe what happens in the last post and the lead up to this is really the whole thread.
Cheers Bob
