Thanks Joe I’ll chew on this info before doing anything Sent from my iPhone
> On Mar 24, 2019, at 11:07 AM, n357cj via KRnet <[email protected]> wrote: > > HI Pete/Jeff, > I was not going to post to this thread but here I am. I have my EIS wired > as noted from the negative of the coils (daul). i have a small toggle swithch > right next to the tach on the panel when I switch ignitions I have to switch > the signal to the EIS also to have a reading. I wired it this way as it was > the most common way when I was growing up working on cars. I understood as > Jeff has re-confirmed that it is basicly the way a mag works also. The > disclaimer is that William Wynn strongly (my word) urges a alternate method, > usually a tooth counter, to drive the tach. Granted this would elminate my > need for the swich on the panel. The caution that I undersatand is the > possibility/fear of a short in the wire from the tach or the instrument that > takes the coil out and there by stopping the fan up front. Just because it > hasn't happened does it mean it won't. So decide fro yourselves the best > method. > Joe Horton, > N357CJ > > > ----- Original Message ----- > From: "KRnet" <[email protected]> > To: "KRnet" <[email protected]> > Cc: "Jeff Scott" <[email protected]> > Sent: Sunday, March 24, 2019 10:11:25 AM > Subject: Re: KR> RPM source for use with Dynon Skyview > > It occurred to me last night while I was working through some wiring diagrams > for an ignition problem that I put an error in this advice to Pete. It is > always the - (ground) side of the ignition coil that is switched, so it is > the - side of the ignition coil that would be used as a tach signal and the > equivalent of the "P-lead" from a magneto as a source for wiring the tach > signal. I'm surprised about a half a dozen of the scholars here didn't > correct me. > > -Jeff Scott > > ----------------------------- > >> Pete, >> >> I've not wired a Dynon, but in your case, I would assume the + side of an >> ignition coil to be the equivalent of the P-lead on a magneto. The voltage >> on the primary side of your coil may be a bit lower than the voltage on a >> P-lead, but I would use a 30 kΩ "pull up" resistor the same as instructed to >> connect a "P-lead" and go from there using the same instructions as outlined >> for connecting to a "P-lead", then configure for a 6 cyl engine. The pulse >> count should be the same as any 6 cyl Continental or Lycoming firing from a >> magneto. >> >> -Jeff Scott > ----------------------------- > >> > > _______________________________________________ > Search the KRnet Archives at > https://www.mail-archive.com/[email protected]/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to [email protected] _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/[email protected]/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to [email protected]
