Return-Path: Received: from [64.136.28.160] (HELO smtp04.lax.untd.com) by logan.com (CommuniGate Pro SMTP 4.1.1) with SMTP id 2534069 for flyrotary@lancaironline.net; Tue, 19 Aug 2003 23:23:13 -0400 Received: (qmail 29166 invoked from network); 20 Aug 2003 03:23:11 -0000 Received: from dialup-67.31.207.146.dial1.tampa1.level3.net (HELO netzero.net) (67.31.207.146) by smtp04.lax.untd.com with SMTP; 20 Aug 2003 03:23:11 -0000 Message-ID: <3F42E988.6040606@netzero.net> Date: Tue, 19 Aug 2003 23:22:48 -0400 From: Finn Lassen User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0 (nscd2) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: some progress, and more understanding References: Content-Type: multipart/alternative; boundary="------------020900040809040506070706" --------------020900040809040506070706 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit I don't see a Zener diode to clamp any spikes. Finn Haywire wrote: > Attached are a couple of pics of my tach divider. It can be set to > divide by any number necessary. I can't guarantee it would work with > any tach but it works very well with my cheap > off-the-shelf-at-any-autoparts-store, Hastings tach. I have a few more > if anybody wants one. > > > S. Todd Bartrim > Turbo 13B RV-9Endurance > C-FSTB > http://www3.telus.net/haywire/RV-9/C-FSTB.htm > > "Whatever you vividly imagine, Ardently desire, Sincerely believe > in, Enthusiastically act upon, Must inevitably come to pass". > > > The EC-2 tach output has 12 pulses per revolution, and won't > directly work with any normal tach. Todd has made a divider to > bring the pulse rate down to normal, and it sounds like it's > working well. The TT that you have expects 1 pulse per rev, so if > you don't mind dividing the rpm reading by 12... :-) > > > --------------020900040809040506070706 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit I don't see a Zener diode to clamp any spikes.

Finn

Haywire wrote:

Message
Attached are a couple of pics of my tach divider. It can be set to divide by any number necessary. I can't guarantee it would work with any tach but it works very well with my cheap off-the-shelf-at-any-autoparts-store, Hastings tach. I have a few more if anybody wants one.

S. Todd Bartrim
Turbo 13B RV-9Endurance
C-FSTB
http://www3.telus.net/haywire/RV-9/C-FSTB.htm

"Whatever you vividly imagine, Ardently desire, Sincerely believe in, Enthusiastically act upon, Must inevitably come to pass".

The EC-2 tach output has 12 pulses per revolution, and won't directly work with any normal tach. Todd has made a divider to bring the pulse rate down to normal, and it sounds like it's working well. The TT that you have expects 1 pulse per rev, so if you don't mind dividing the rpm reading by 12... :-)

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