Re: A prospective s.s.t.c. input-synchronizer (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Gerry Reynolds <greynolds@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Tue, 19 Dec 2006 20:49:48 -0600
From: Steve Ward <steve.ward@xxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: A prospective s.s.t.c. input-synchronizer (fwd)

Hi Ken,

It may be either a grounding issue, or it could be possible that the
noise isnt real.  Putting ceramic caps on every IC V+ and ground
should normally be good enough.  Make sure that you dont have any high
currents flowing through the 5V ground.  If the 5V circuit is grounded
to anything else, be sure to use "star" grounding, and the 5V circuit
is just a branch on the star, and not the center.

You probably already know all this, but you did welcome suggestions,
and hopefully it will get you started on figuring out the problem.

Steve

On 12/19/06, Tesla list <tesla@xxxxxxxxxx> wrote:
> Original poster: Gerry Reynolds <greynolds@xxxxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Tue, 19 Dec 2006 11:28:54 -0800
> From: K. C. Herrick <kchdlh@xxxxxxx>
> To: Tesla List <tesla@xxxxxxxxxx>
> Subject: Re: A prospective s.s.t.c. input-synchronizer
>
> Chip, Steve Ward (& all)-
> ----------------------------------------------------------
>
> Hi Ken.
>
> Sorry for the delay.  I got slammed at work and didn't end up on the
> computer last night.  Here's the link.  It's just plain right now but can
> be fixed up to have html in it later. I just wanted to get it done.  Sorry
> for the delay again.
>
> Chip
>
> http://www.pupman.com/current/kcherrick/tch-synctest4a.jpg
> ------------------------------------------
>
> No problemo; looks perfect as-is.  And to all:  The above link is the replacement circuit for my synctest2.jpg that I'd posted
> previously on hot-streamer.  This one seems to work in the hardware.
>
>
> And Steve...in further response to yours of 12/18: My low-level EMI
> problem appears to stem from a 14 MHz transient that appears on the +5V
> bus every time the H-bridge switches.  I'm now trying to track that
> down.  Suggestions on that from >>anyone<< are welcome!!
>
> KCH
>
>
>
>