How can I shape, and make use of, pulses induced into a coil by spark plug wire?
I wrapped 4 loops of #22 insulated wire around a sparkplug wire on a motorcycle, then connected the looped wire ends to an oscilloscope. From this setup, the scope showed large, very ragged, pulses being induced into the loop. The pulses are larger than I expected, very irregular and appeared to be composed of more than one pulse.
I would like to feed those pulses to a data logger (already made) that will count and store those pulses as 'pulses per second'. Eventually used to determine RPM in PC program.
I think the pulses, as they are directly obtained from spark plug wire, would be difficult to work with, and that they should be shaped into something more useful.
Can anyone suggest circuitry to shape and form those ragged pulses?
I’m thinking:
Filtering, rectifying, clipping, clamping , integrating ?
Has anyone worked with such a thing?
How about optical circuitry?
I made a data logger, using Arduino system, that stores data on SD cards. I made it to accept, count and store square wave pulses. I can use the stored SD data and transfer it to a PC program, such as a spreadsheet.
Thank you
PO’T
I wrapped 4 loops of #22 insulated wire around a sparkplug wire on a motorcycle, then connected the looped wire ends to an oscilloscope. From this setup, the scope showed large, very ragged, pulses being induced into the loop. The pulses are larger than I expected, very irregular and appeared to be composed of more than one pulse.
I would like to feed those pulses to a data logger (already made) that will count and store those pulses as 'pulses per second'. Eventually used to determine RPM in PC program.
I think the pulses, as they are directly obtained from spark plug wire, would be difficult to work with, and that they should be shaped into something more useful.
Can anyone suggest circuitry to shape and form those ragged pulses?
I’m thinking:
Filtering, rectifying, clipping, clamping , integrating ?
Has anyone worked with such a thing?
How about optical circuitry?
I made a data logger, using Arduino system, that stores data on SD cards. I made it to accept, count and store square wave pulses. I can use the stored SD data and transfer it to a PC program, such as a spreadsheet.
Thank you
PO’T