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Aaron's Custom ST16x Econometer

Discussion in 'Electronics' started by aaron, Feb 6, 2012.

  1. aaron

    aaron Well-Known Member

    First of all, I apologise for the lack of updates! I have been pretty busy with work and my missus just got a new job so I have less time than ever to work on anything.
    Don't be worried though, I spend every minute that I can working on my econometer :D

    Having said that though, I have an update to make!

    The base fonts are complete! I've had to manually enter each and every pixel of every letter and symbol into a fonts file, but it was worth it :D

    I'm currently working on optimisation and the menu system. Everything's different to the text based LCD so there is a learning curve, but I'm a quick learner.

    [​IMG]
    P1040387 by DeL337--, on Flickr
     
  2. Seank90

    Seank90 Well-Known Member Donated!

    That looks great! ;)
     
  3. aaron

    aaron Well-Known Member

    Another quick update, I've been playing around mocking up different ways of displaying stats and gauges.

    [​IMG]
    P1040388 by aaronjones11193, on Flickr

    Suggestions and comments always welcome! :D
     
    Last edited: Dec 1, 2012
  4. JoeJack88

    JoeJack88 Well-Known Member Super Moderator Donated!

    I would definitely love something like this! good work so far man!
     
  5. Spiderman

    Spiderman Well-Known Member

    Thanks for the update and good job dude, pixel by pixel works and of course it looks better/clearer from a distance.

    If you can create a font file, is it possible to create a tiny gif or jpeg 'file' for each 'letter' or am I just being difficult and ridiculous ??

    I'd be happy with 15 km/l and I tune mine at 900 rpm.

    How many sensor readings are you thinking about at this stage ??

    What happens when there is a warning ??
     
  6. aaron

    aaron Well-Known Member

    I was planning on having a way to introduce a custom font or 3 on the SD card, but it won't be using a font file that you'd normally find on a computer because of the way my LCD driver works.

    The readings on the screen are just dummy readings at the moment, since my celi spun a bearing. I wish I got 8L/100km :p

    IIRC, there's about 16 different sensor inputs. I might actually take a couple of them to use for accessories though.

    I haven't decided what will happen when there's a warning yet, I'm thinking make a red light flash and make a "beep beep beep" noise while the warning flashes on screen.
     
  7. Stig

    Stig ST162 Guru Donated!

    Spread them out more like on the Stack gauge
    Just a buzzer for warning is enough
    Nice work

    From what I understand you are programming in machine code? That means the chips only understand what you tell them and there are no ways of installing fonts or photos. Does the system have a BIOS?
    I don't think most here understand just how much programming time has been spent on the project.

    How bad is the spun bearing? If it's just noisy I could send you a used bearing to put in it's place
     
    Last edited: Dec 9, 2012
  8. aaron

    aaron Well-Known Member

    The way I'm doing it you actually have complete control over where and what style each gauge is, I just put them on the screen to see how they'd look.

    I'm programming in AVR C, I don't think I'd have the patience to do all this in machine code just yet :p and yes, there has been a hell of a lot of programming time. I have around 20 different code files, some thousands of lines long!

    The bearing has been completely destroyed and the crank slightly worn down. I have a set of GTE bearings so I've got a spare cap and I'm linishing it down today at work so it fits snugly on the crank. It's only so that I can move the car around my yard for now, I was going to drive to work on it but I don't think I would trust it to handle a constant 4k RPM.

    [video=youtube;-3qLhx4dh5U]http://www.youtube.com/watch?v=-3qLhx4dh5U[/video]
     
  9. Stig

    Stig ST162 Guru Donated!

    Sorry dude, that rod is munted and I can't believe it didn't break

    What happens when the bearing collapses like that is that the cap gets stretched and the hole is no longer round but oval.
    If it starts to knock, stop immediately and change the bearing asap
     
  10. aaron

    aaron Well-Known Member

    I realised that the rod wasn't round anymore when I tried to put the new bearing in lol
    I took the bearing cap to work today and shaved about 1mm off of it to try and round it out just so I can move the car around the yard.

    I'll let you know how it goes, I'm planning on building a high comp 5SGE for it while it's off the road so i only need to bodge something up for now.
     
  11. Stig

    Stig ST162 Guru Donated!

    Normally you'd struggle to get the cap off, if a cap is stiff I have them checked just to be sure.
    These rods go out of shape real easy & I've junked heaps.

    I'm looking at a gen2 5SGE for my next motor too, w/Honda pistons in my Yammie:p
     
    Last edited: Dec 10, 2012
  12. aaron

    aaron Well-Known Member

    H22a pistons too? :D
     
  13. Stig

    Stig ST162 Guru Donated!

    Had them for ages dude, looking for 1.5mm longer rods - might have some made to take the 12 000rpm I plan to run them at
    - just kidding, but you never know what can happen in my garage

    This is a K20 but the top looks the same
    [​IMG]

    My H22 piston compared to stock
    [​IMG]
     
    Last edited: Dec 10, 2012
  14. aaron

    aaron Well-Known Member

    12k oversquare 5S screamer, you've got your work cut out for you :p

    Are you trying to keep the piston flush/above deck? I hadn't thought about rods too much yet, AFAIK the GE/GTE rods will fit on a machined 5S crank.
     
  15. Stig

    Stig ST162 Guru Donated!

    Honda did it with their bikes in the 60's, 18 000rpm 4 stroke twins were something to be in awe of

    If you machine the 5S crank, you can gain another 2-3mm stroke and get the pistons flush with 3S rods. Expensive but....
    I dunno, the 5S bearing will be a lot stronger and stroke is less of a gain than longer rods, plus the undersquare factor?
    Ever notice how big the bearings are on a diesel motor?
     
  16. aaron

    aaron Well-Known Member

    Honda does make some crazy engines! I guess you can rev bike engines a lot higher because of their size too..

    I got my over and undersquares mixed up lol, I meant undersquare.

    I didn't think the 5S bearings were stronger? 5S rods are quite a bit thinner than 3S ones, plus the comp ratio is lower.

    Ever notice how ridiculously high the comp ratios are on diesel engines? I think that may have something to do with the size of the bearings :p
     
  17. Stig

    Stig ST162 Guru Donated!

    No, the bigger the bearing, the larger the surface area to absorb the load and less it will wear.

    Diesels use compression around 18-1 to "explode" the mix without using a sparkplug, they detonate on every stoke and that's why the bearings/journals are so much larger
     
  18. Spiderman

    Spiderman Well-Known Member

    yup........ any wonder diesels last 'forever' producing sooooooo much power.


    Different story in cars though, don't they run diesels in the 24hr 'Le Mans' race at ridiculous RPM's ??


    On a side note, gidday to our member - Thepowerofdiesel :mrgreen
     
  19. MattC

    MattC Well-Known Member Donated!

    Nup, the LeMans diesel racers produce peak power at around 5000rpm and as per road-going diesel motors the power drops away sharply after that, you can rev them higher but you're only making noise and wasting fuel. The ridiculous numbers are the torque - over 1000Nm available at just 1750rpm, and the fuel pressure for the direct-injection system - 2000bar (29,000psi) in the fuel rails. Going back to the rpm though, I've read that one of the hardest things for the drivers to adapt to is racing a diesel in the wet; whereas in a petrol-engined car you would short-shift to avoid spinning the tyres on gearchange, in a diesel racecar you have to rev the motor higher to get it out of the power band before you shift. Interesting stuff.
     
  20. scottjackson1209

    scottjackson1209 Well-Known Member Donated!

    So what happened with this project? Is it still in work?
     

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