Re: Servos, power, and the expansion board Here is an update:

I added an external power supply for the servos. Same problem.
Everything works fine if I hook up to the charger in ZAP mode.

Anyhow, I added an 0.22 microfarad across +5V and ground simply by sticking it
into the headers on the expansion board and that solved the problem.
Perhaps the expansion board could do with some more filter/decoupling caps?

Anyhow, I guess I'll keep the external power for now.  I just have to find a
place to hold 4 more AA batteries on my robot.  It's tiny.

-Scott Harris.

In lugnet.robotics.handyboard, Scott Harris writes:
>I've got four servos attatched to my expansion board and unless I keep the
>charger attatched in ZAP mode, I experience a lot of jittering. Has anyone
>else experienced this?  Perhaps the NiCads in my Handyboard are old?
>
>Anyhow, I'm going to sever the connection to the handyboard battery and supply
>my own power to the servos.  I'd really prefer, however to keep everything
>powered by the handyboard; it's much more elegant that way.
>
>In the past, I ran two servos using the Scott Edwards SSC servo controller with
>out any glitches.  I got all the power I needed from the handyboard.
>
>Anyhow, thanks for your help/comments.
>
>-Scott Harris

