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Ignitor circuit details needed.
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10-19-2009, 07:01 PM
Post: #4
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I put a scope on the tacho signal both with and without the Denso O/E rev counter connected. The scope traces showed a 0 to IG+ waveform including substantial spikes. That info, in conjunction witht the measured 1K resistance between IG- and the coil -ve terminal leads me to conclude that the internals are as shown in attachment.
.[img name=]http://www.aeu86.org/files/ig/ignitor_tacho_signal_264.zip[/img] The good news (for me) is that my CAi rev counter works fine if I use the available option of a 'coil -ve' connection (as opposed to an 'ECU signal' connection). It obviously didn't like seeing a spiky coil -ve type signal at it's 'ECU' input - probably expecting a clean 0 to 5v digital waveform? The fact that there's a 1K resistance in series makes no odds. Please not that my result is only valid for a UK setup with the parts numbers mentioned at the start of this thread. |
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| Messages In This Thread |
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Ignitor circuit details needed. - misterforager - 10-15-2009, 03:16 PM
[] - irishtwincam - 10-16-2009, 12:58 PM
[] - misterforager - 10-16-2009, 01:36 PM
[] - misterforager - 10-19-2009 07:01 PM
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