Hi,
Short version:
I have a sensor that generates a signal from 80Hz to ...Hz
I need to make a signal modifier that takes this input and follows it 1 to 1 so: 80Hz = 80Hz/100Hz = 100Hz/.... but if it gets to 155Hz or above it should keep outputting 155Hz.
So 180Hz = 155Hz / 200Hz = 155Hz
When the sensor drops below 155Hz it should go back to following the input
Long version:
This sensor is a MAP (manifold air pressure) on a car. This car is originally non turbo so the engine and thus the sensor only sees vacuum.
The car will have an aftermarket turbo and now this sensor will see positive pressure the car won't know what to do with this value and go in limp mode and not run right
The car only understands 80HZ to 155HZ (vacuum to atmosphere) adding a turbo will create positive pressure which means a value higher than 155Hz (according to some info I found its 0kpa = 159Hz, I'm saying 155Hz to have some buffer) The higher values will cause the limp mode
So I need to make something that outputs what this sensor outputs 80Hz-155Hz but if it goes over this it should keep outputting 155Hz untill it drops back down.
There was a company that made this modifier but it's not being made anymore, and a lot of the turbo kit's that had this modifier included don't have these anymore because they are all second hand (it's an old kit) and most people just didn't know it was part of the kit and didn't take it out the donor cars
A normal MAP sensor (on basicly any car) gives a 0-5V output and is very easy to modify but this ford sensor gives a frequency output.
So the part i'm looking for isn't existant/readily available in the automotive world.
But i was thinking in electronics there has to be a circuit that does just this.
It doesn't sound that hard, and someone must've had a use for something somelar like this
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What I have been thinking of is a high pass filter at 155hz
That would somehow know when its filtering and then switch to a 555 timer that is set at 155Hz
I have been racking my brain on how to connect these 2 circuits but I just don't know how.
I am really hoping there is someone here that has a circuit that can do this or something simular or help me figure this out.
I might be completly wrong in this reasoning, I have some knowledge of electronics but really not that in depth. so any help is really much appreciated
It should be possible with an arduino but i'd prefer the system to be as simple as possible.
There was one guy who tried it with an arduino but didn't get it to work.
So i'd preffer another approach.
Thank you for reading, any input is very welcome!
(and I appologise if this is in the wrong thread I wasn't sure where to put this)
Short version:
I have a sensor that generates a signal from 80Hz to ...Hz
I need to make a signal modifier that takes this input and follows it 1 to 1 so: 80Hz = 80Hz/100Hz = 100Hz/.... but if it gets to 155Hz or above it should keep outputting 155Hz.
So 180Hz = 155Hz / 200Hz = 155Hz
When the sensor drops below 155Hz it should go back to following the input
Long version:
This sensor is a MAP (manifold air pressure) on a car. This car is originally non turbo so the engine and thus the sensor only sees vacuum.
The car will have an aftermarket turbo and now this sensor will see positive pressure the car won't know what to do with this value and go in limp mode and not run right
The car only understands 80HZ to 155HZ (vacuum to atmosphere) adding a turbo will create positive pressure which means a value higher than 155Hz (according to some info I found its 0kpa = 159Hz, I'm saying 155Hz to have some buffer) The higher values will cause the limp mode
So I need to make something that outputs what this sensor outputs 80Hz-155Hz but if it goes over this it should keep outputting 155Hz untill it drops back down.
There was a company that made this modifier but it's not being made anymore, and a lot of the turbo kit's that had this modifier included don't have these anymore because they are all second hand (it's an old kit) and most people just didn't know it was part of the kit and didn't take it out the donor cars
A normal MAP sensor (on basicly any car) gives a 0-5V output and is very easy to modify but this ford sensor gives a frequency output.
So the part i'm looking for isn't existant/readily available in the automotive world.
But i was thinking in electronics there has to be a circuit that does just this.
It doesn't sound that hard, and someone must've had a use for something somelar like this
------------------------------------------------------------------------------------------------------------------------------------
What I have been thinking of is a high pass filter at 155hz
That would somehow know when its filtering and then switch to a 555 timer that is set at 155Hz
I have been racking my brain on how to connect these 2 circuits but I just don't know how.
I am really hoping there is someone here that has a circuit that can do this or something simular or help me figure this out.
I might be completly wrong in this reasoning, I have some knowledge of electronics but really not that in depth. so any help is really much appreciated
It should be possible with an arduino but i'd prefer the system to be as simple as possible.
There was one guy who tried it with an arduino but didn't get it to work.
So i'd preffer another approach.
Thank you for reading, any input is very welcome!
(and I appologise if this is in the wrong thread I wasn't sure where to put this)