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IMPORTANT: enter the case-INsensitive alphabetic (no numbers) code AND WRITE SOME SHORT summary of changes (below) if you are saving changes. (not required for previewing changes). Wiki-spamming is not tolerated, will be removed, so it does NOT even show up in history. Spammers go away now. Visit Preferences to set your user name Summary of change: This Mitsubishi has a HALL trigger, but '''apparently it has a series capacitor''' that causes the very characteristic sharktooth signal. The trigger is Coil type (one pulse per event ), but alternating positive and negative to distinguish 1-4 and 2-3 cylinders (are you sure?). Every spark belongs to a step on the figure below. DC: ~2.5V, amplitude: ~2.5V. I recorded the trigger signal: http://www.bormodell.hu/IgnitionTrigger.png The signal is processed with LM1815 and series condenser so it is theoretically universal considering trigger type (hall and VR). In 50% of cases, LCD displays right value, otherwise rough half of proper RPM. I thought about using graetz-bridge but then I loose the information whether 1-4 or 2-3 cylinder needs spark. The camsync could help find the correct cylinder. Note that greatz would not work for other reasons (the grounsd are connected, not independent!). Any ideas, how to condition the signal? * try swapping the 10k pullup inside v3.x : '''use an 1M''' or even higher (eg. 1.5M) '''pulldown'''. The series cap will drop voltage very slowly with that value. ---- Check bottom of DocsPage to upload files to wiki. Optional: Add document to category: Wiki formatting: * is Bullet list ** Bullet list subentry ... '''Bold''', ---- is horizontal ruler, <code> preformatted text... </code> See wiki editing HELP for tables and other formatting tips and tricks.