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Duty Cycle as Ignition Switch Input
Posted:
Sat Dec 20, 2008 11:39 pmby Mazi
I would like to use Porsche air bag & rollover signal like "ignition switch function" on digital input. Signal is 80% duty if status is normal and 20% duty if crash status is present (some models has opposite duty). Frequency is 10Hz
Any idea how to do that?
Re: Duty Cycle as Ignition Switch Input
Posted:
Tue Dec 23, 2008 4:09 amby ElectronSpeed
While I have not done what you ask . . .
Is the signal supplying positive voltage or ground? Hopefully ground. If so, couldn't you use an RC filter on the signal and feed it into the AT pin?
Eric Schieb
Electron Speed
Re: Duty Cycle as Ignition Switch Input
Posted:
Wed Dec 24, 2008 12:16 amby Mazi
Do you think about low pass filter? At 10Hz?
If there is no way to read direct duty, I will put an small PIC uP between signal and motec input to do the job.
Thanks Eric
Re: Duty Cycle as Ignition Switch Input
Posted:
Fri Jan 02, 2009 2:14 amby ElectronSpeed
Yep, a low pass would be what you want. However, I would go less than 10 Hz. 1?
Eric Schieb
Electron Speed