Xref: utzoo rec.models.rc:749 sci.electronics:3528
Path: utzoo!utgpu!attcan!uunet!husc6!mailrus!iuvax!purdue!decwrl!labrea!glacier!jbn
From: jbn@glacier.STANFORD.EDU (John B. Nagle)
Newsgroups: rec.models.rc,sci.electronics
Subject: Decoding R/C servo signals into simple on/offs
Keywords: R/C servo digital PWM
Message-ID: <17606@glacier.STANFORD.EDU>
Date: 3 Aug 88 17:38:52 GMT
Organization: Stanford University
Lines: 10


       I have an application that requires that I take a standard signal
from an R/C receiver intended for a single servo and generate an on/off
signal with it.  The servo signal is the usual 22ms square wave with an
on time of from 1ms to 2ms.  We would consider > 1.5ms to be "on".
Is there a standard way to do this?  Certainly one could do it with
a 555 timer and some standard TTL, but is there a solution with fewer
parts?  Please, no schemes involving servomotors driving mechanical switches.

					John Nagle