Change font size


Post a new topicPost a reply Page 2 of 2   [ 18 posts ]
Go to page Previous  1, 2
Author Message
 Post subject: Re: Arduino project to scale Steering Angle Sensor output
PostPosted: Wed Jul 19, 2017 9:11 am 
User avatar

Vehicle: MY00 SF5 - MY04 SG9 STi

Posts: 333
Location: Melbourne
This is amazing, I love a good Arduino project :thumbs:

hired-goon wrote:
If anyone knows of an ACC-switched power source that doesn't cut when cranking this could be an alternate solution. I also considered using a relay and capacitors to bridge the crank power gap

I'm not familiar at all with the SH, but if it's anything like the SF/SG then when the key is in cranking position, B+ power is disconnected from ACC momentarily:

Image

The other thing you could do is just use constant B+ power for the Arduino and set it to power-save/standby mode when ACC is not detected (after a reasonable period of time).

_________________
Rob's Faux MY00 JDM S/tb v7 STi
Rob's Legit MY04 SG9 STi


Top
 Profile  
 
 Post subject: Re: Arduino project to scale Steering Angle Sensor output
PostPosted: Wed Jul 19, 2017 6:57 pm 
User avatar

Vehicle: JDM SF STi Pure White

Posts: 148
Location: Germany
robbith wrote:
set it to power-save/standby mode when ACC is not detected.


I haven't looked through the code or the specs for the CAN-Shields, but the whole thing is probably using less than all the other thingamabobs in the car that are constantly on. So i wouldn't really bother with that.

What i think OPs issue is, is the fact that the Arduino gets powercycled when the car cranks. The whole thing "booting" when the car is already on might take enough time to make the car not see the steering angle sensor and throw a faultcode. Which is solveable by connecting the arduino to a constant power supply.


Top
 Profile  
 
 Post subject: Re: Arduino project to scale Steering Angle Sensor output
PostPosted: Wed Jul 19, 2017 9:25 pm 
User avatar

Vehicle: MY12 S-Edition Marine Blue

Posts: 83
Location: Sydney, NSW
Phrewfuf wrote:
robbith wrote:
set it to power-save/standby mode when ACC is not detected.


I haven't looked through the code or the specs for the CAN-Shields, but the whole thing is probably using less than all the other thingamabobs in the car that are constantly on. So i wouldn't really bother with that.

What i think OPs issue is, is the fact that the Arduino gets powercycled when the car cranks. The whole thing "booting" when the car is already on might take enough time to make the car not see the steering angle sensor and throw a faultcode. Which is solveable by connecting the arduino to a constant power supply.


Indeed that is the problem. The Arduino needs to be booted up and transmitting within a few moments (possibly less than a second) of ON otherwise the VDC detects a fault and disables itself until the engine is switched off again. I considered leaving it on full time but opted for switched power to ensure I didn't run it low. I haven't done any consumption calculations other than ensuring my circuits were of a sufficient size.

_________________
MY12 S-Edition - Gallery thread hopefully coming soon


Top
 Profile  
 
 Post subject: Re: Arduino project to scale Steering Angle Sensor output
PostPosted: Wed Jul 19, 2017 9:46 pm 
User avatar

I Say: Car mods are like OddBodz, you got to collect them all! -------------------------------------
Vehicle: MY05 STi swapped sled

Posts: 17723
Location: Spearwood Perth WA
Having an ACC power supply stay active while cranking is easily done with 2 diodes. One on ACC and the other on IGN. (Or crank) That way power can be taken from both circuits to give you a feed that is on at ACC, IGN and CRANK, but the diodes stop the circuits back feeding and crossing.

You could probs buy the diodes needed for a few cents.

_________________
>>>My Ride<<<


Image


Top
 Profile  
 
 Post subject: Re: Arduino project to scale Steering Angle Sensor output
PostPosted: Thu Jul 20, 2017 1:06 am 
User avatar

Vehicle: MY12 S-Edition Marine Blue

Posts: 83
Location: Sydney, NSW
That's the exact solution I'm using at the moment in lieu of an ACC switched signal that doesn't cut with cranking

_________________
MY12 S-Edition - Gallery thread hopefully coming soon


Top
 Profile  
 
 Post subject: Re: Arduino project to scale Steering Angle Sensor output
PostPosted: Thu Jul 20, 2017 6:53 pm 
User avatar

Vehicle: 2004 MY05 XT - Blue

Posts: 590
Location: S.E Victoria
Love seeing these kinds of projects. Great work. Any other plans for the arduino in the car?

Sent from my X9079 using Tapatalk

_________________
>>>My Build Thread<<<
Image


Top
 Profile  
 
 Post subject: Re: Arduino project to scale Steering Angle Sensor output
PostPosted: Thu Jul 20, 2017 9:14 pm 
User avatar

Vehicle: MY12 S-Edition Marine Blue

Posts: 83
Location: Sydney, NSW
Not myself.
I used this to solve a specific problem and it works perfectly, I haven't given any thought to doing anything else.

_________________
MY12 S-Edition - Gallery thread hopefully coming soon


Top
 Profile  
 
 Post subject: Re: Arduino project to scale Steering Angle Sensor output
PostPosted: Sat Aug 04, 2018 10:27 pm 
User avatar

Vehicle: MY12 XT Premium Auto White

Posts: 417
Location: Brisbane
HiredGoon and others,

Has anybody done the OEM possible solution by swapping the SH Forester VDC unit to the 2015 STI VDC unit, therefore matching it with the rack?


This QUOTE 'option I considered was swapping the SH Forester VDC unit to the 2015 STI VDC unit, matching it with the rack. I decided against following this due to a few factors, the first being the prices quoted from wreckers for VDC units were $350-$400, plus the uncertainty over if it would be compatible with the rest of the Forester sensors and systems. I couldn't find anyone who had done this swap.'

Cheers Al


Top
 Profile  
 
Display posts from previous:  Sort by  
Post a new topicPost a reply Page 2 of 2   [ 18 posts ]
Go to page Previous  1, 2


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  


Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
"Takka LE" for phpBB3