Hello,

Well I must say, that is probably the only thing I have not tried yet.

No voltage divider and running off LiPo only. I must say I am skeptical but I will try it anyway.

I still believe this is a problem with synching the pulses the D0 is supplying to the servo signal line.

I mean most manufacturers supply some kind of data sheet that details the wave forms needed to drive devices. I have not seen anything from these guys nor have I seen anything from ezrobot detailing the pulse widths and frequency. I would like to think that all manufacturers would hold themselves to a standard format making things easier.

Dave

Eureka.....

Servo is now moving with only using the 7.4V Lipo battery and no voltage divider.

I was hoping to be able to run the EZ-B and servos using an AC-DC adapter while doing test/development for this project. That is why I was running everything initially at 8.2 Volts. Which as we can see is too much for our servos causing a reset on the EZ-B.

Also, we know that current limiting the servos via voltage divider on the red power line is not advisable for proper movement.

Also, we know that changing the code on the EZ-B hardware is not an option. Not that I would really want to if I didn't have to.

I am happy now with this purchase and I am sure there will be other issues that come up. We can handle that as need be.

Thank you all for helping me resolve this [now seemingly] trivial issue.

Sincerely,

Dave

I should have tried that first. Shouldn't I. :]

That's great to hear David. Sometimes the simplest solutions can be overlooked.

In regards to bench testing, with the right mains power adapter supplying enough amps, I believe it is possible and some members of the community have done just this. Perhaps Someone who has done this could chime in and mention what adapter power specs they are using.

Anyway, I'm pleased your up and running.

Talk about an easy solution... Servos need power....

Minimum bench power supply should be 20Amps in my opinion... Power supplies differ from batteries... You have to buy a power supply with a high enough amp output to overcome the start up "inrush" of current required to get servos first moving.....

As Richard said, it wasn't the voltage of the power supply, but the amps. EZ-B can take way more than 8.2 volts (servos might not) but you need much higher than the rated amps when the servos start moving.

Alan

Glad you got it figured out David! And also wanted to echo a thanks to you gentlemen in the forum as well!