some ideas
Moderators: David Barker, Jerry Messina
some ideas
Hello All,
Ok I have been doing some thinking on my ignition. What I think will work the best is to use a timer and measure the time the input is low. kinda like dwell. and from there I can work on what delay I need to get the spark curve I need. Does this seem like a accurate way to measure for engine speed?
Ok I have been doing some thinking on my ignition. What I think will work the best is to use a timer and measure the time the input is low. kinda like dwell. and from there I can work on what delay I need to get the spark curve I need. Does this seem like a accurate way to measure for engine speed?
Running version 2.2.4.0 ICC 1.2.1.0
Regards CharlieM
Regards CharlieM
- Senacharim
- Posts: 139
- Joined: Tue Aug 10, 2010 5:19 pm
- Location: Ventura, CA
- Senacharim
- Posts: 139
- Joined: Tue Aug 10, 2010 5:19 pm
- Location: Ventura, CA
Oh!
If your hall effect sensor changes state rapidly enough, then it should be fairly straightforward to wire it to one of the interrupt pins on the PIC.
You'll need a clock or some method of guesstimating when 1 second and/or 1 minute have passed...
IMHO that should work fine.
If your hall effect sensor changes state rapidly enough, then it should be fairly straightforward to wire it to one of the interrupt pins on the PIC.
You'll need a clock or some method of guesstimating when 1 second and/or 1 minute have passed...
IMHO that should work fine.
Surviving Member
Bermuda Triangle Battalion
from 2026 to 1992
Voted "Most likely to time travel"--Class of 2024.
Bermuda Triangle Battalion
from 2026 to 1992
Voted "Most likely to time travel"--Class of 2024.
- Senacharim
- Posts: 139
- Joined: Tue Aug 10, 2010 5:19 pm
- Location: Ventura, CA
Sry, should read a little more into your original reply.
I think so long as your sensor isn't too greatly modifying the electrical characteristics of the ignition then your proposed method should also work... of course you'll need to take steps to blunt the amperage of the ignition from ever reaching your PIC.
I think so long as your sensor isn't too greatly modifying the electrical characteristics of the ignition then your proposed method should also work... of course you'll need to take steps to blunt the amperage of the ignition from ever reaching your PIC.
Surviving Member
Bermuda Triangle Battalion
from 2026 to 1992
Voted "Most likely to time travel"--Class of 2024.
Bermuda Triangle Battalion
from 2026 to 1992
Voted "Most likely to time travel"--Class of 2024.