Subject:
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Re: Servos, power, and the expansion board
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Fri, 7 Jan 2000 02:11:04 GMT
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Viewed:
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935 times
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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
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Message is in Reply To:
 | | Servos, power, and the expansion board
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| 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 (...) (25 years ago, 6-Jan-00, to lugnet.robotics.handyboard)
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