| ??? 03/15/05 13:16 Read: times |
#89712 - Sniffing spark Responding to: ???'s previous message |
If you just want rpms - say for a shift light (what a wank! if you're hard at it, you're not looking at the dash for a shift light - besides you can hear/feel a motorbike engine - car engines are a different story) most after market stuff picks up off the ignition lead - you'll get a nice capacitively coupled pulse. This is a question for the others out there - with my little gokart engine which has a CDI ignition - I get loads a ringing in the coupled signal thus giving me wildly varying rpms. Not good. What's the trick in the input circuit for ignoring/filtering such ringing? It can't be too hard - just beyond my limited capacity! The input frequency is about 20 to 266hz (1200 to 16000rpm) - the pulse looks like the classic exponentially decaying ring.
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| Topic | Author | Date |
| Hall Effect Sensor | 01/01/70 00:00 | |
| Subject Circuit | 01/01/70 00:00 | |
| why tap into the ignition interface? | 01/01/70 00:00 | |
| Spare Spark | 01/01/70 00:00 | |
| divide by two? | 01/01/70 00:00 | |
| Wasted Spark | 01/01/70 00:00 | |
| Spare/wasted | 01/01/70 00:00 | |
| nomenclature | 01/01/70 00:00 | |
| Hall Effect? | 01/01/70 00:00 | |
IR | 01/01/70 00:00 | |
| NOT Halleffect | 01/01/70 00:00 | |
| Sniffing spark | 01/01/70 00:00 | |
| Hall Effect Sensor Help | 01/01/70 00:00 | |
| Thanks | 01/01/70 00:00 | |
| Schematic | 01/01/70 00:00 | |
| Decreasing 1M resistance | 01/01/70 00:00 | |
| Different approach | 01/01/70 00:00 | |
| 18Vpp or 18Vp? | 01/01/70 00:00 | |
| Correcting of typing error | 01/01/70 00:00 | |
| Re: Typing error | 01/01/70 00:00 | |
| Some comments | 01/01/70 00:00 |