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Date:         Fri, 30 Jun 2006 14:51:06 -0700
Reply-To:     John Bange <jbange@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         John Bange <jbange@GMAIL.COM>
Subject:      Re: Idle Stabilizer Control Box
In-Reply-To:  <44A57C2A.3080908@charter.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

> I had forgotten about your project. Is there any way I can help from a > long distance?? > > Well, the only I don't know that's critical to the design is what, exactly, the Idle Control Valve takes to operate. Really, that's the whole deal, there. All the rest of it is binary inputs: PS pump switch, AC switch, ignition pulse for counting RPM. Once I know how the valve operates, I could theoretically just tune it in via software. That's the tough part though. So far the voltmeter just shows a constant voltage. I need an oscilloscope or the like to see what it's doing. Might be using pulse width modulation or something, but I can't tell. The optional data logging module for the Innovate LM-1 wideband O2 sensor tool works something like an after-the-fact oscilloscope, but it reads only 0-5 volts at the inputs and I'm not yet certain the valve control won't spike and fry it. Yeah, I know, a zener diode and a couple resistors; I can't remember the last time I had the energy to make a trip to the electronic parts place...

-- John Bange '90 Vanagon - "Geldsauger"


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