[NSRCA-discussion] Optical Isolation of Servo

[Bob Richards]

There are optical isolators that only isolate the signal wire itself, the servo still gets its power through the extension from the receiver. That might help. There are chokes that will add some impedance to the RF interference (small ferrites on the leads) but that does not completely isolate the interference. If you want a completely isolated throttle servo, the only one I know of is from Forques Research.
 
http://forgues-research.com/index.html
 
The throttle servo gets its power from the ignition battery (or a separate battery), the servo signal is through a fiber optic cable. Use this in conjunction with a fiber optic ignition kill switch (as previously posted, from Smart-Fly) and everything associated with the engine is isolated electrically from the radio.
 
Bob R.


--- On Thu, 7/9/09, Ron Van Putte <vanputte at cox.net> wrote:


From: Ron Van Putte <vanputte at cox.net>
Subject: [NSRCA-discussion] Optical Isolation of Servo
To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org>
Date: Thursday, July 9, 2009, 1:09 AM


A customer needs to get rid of interference from the ignition engine he's using, which causes the throttle servo to surge.  I suggested he look into optically isolating the servo from the receiver, to preclude the EMI going down the servo wires to the receiver.  He asked me where he could buy such a device and that's where I ran out of ideas.  I remember that they used to be available, but can't remember who marketed them.  Anybody know?

Ron VP
_______________________________________________
NSRCA-discussion mailing list
NSRCA-discussion at lists.nsrca.org
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20090709/d0209a64/attachment.html>