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Roman last won the day on March 14 2018

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  1. Roman

    Arduino stuff/ programing/so cheap

    As a general rule though with Arduino IDE you dont need to specify anything in hex, if you just write "10" or a normal number it assumes you're using normal numbers There's a list of prefixes you can use here:
  2. Roman

    Arduino stuff/ programing/so cheap

    When you put the "0X00" at the front, its telling the program that you are using hexidecimal. So "10" in hex is 0xA not 0x0010 or if you need to keep that format for the string maybe its 0x000A
  3. Roman

    Arduino stuff/ programing/so cheap

    What are you writing over serial to/from? Perhaps add some commenting at each part of your loop so you can see on the serial monitor what's happening / where it gets stuck?
  4. Roman

    Arduino stuff/ programing/so cheap

    I do lots of compares to last value to minimize writes to my screen. Every value i declare twice so store last value: Int RPM =0; Int RPM_old = 0; Then in code: If (RPM != RPM_old) [ *Stuff to do if value is different goes here* RPM_old = RPM; ]
  5. Roman

    Arduino stuff/ programing/so cheap

    What kind of powersupply are you using? LM7805? What I'd try do is isolate the two tasks, have the arduino running from the power from the car without doing anything connected to the ignition for starters. If that's stable, then you know its the ignition side of things causing problems. Otherwise, your powersupply from car needs some work. No idea how to troubleshoot either things though.
  6. Half assed out loud thoughts... If you had an equal length 4 link that kept the diff nose angle steady, could you just mount a diffuser to a live axle? It wouldnt compress the suspension but it'd still push the wheels into the ground and always be same height above the track haha.
  7. Roman

    DIY Fuel injection thread.

    Yeah it depends, sometimes if it something like a powerfc then it'll have specific things to work with specific OEM parts. For example you can use a 1ZZFE ECU on a redtop beams 3SGE engine, but you need to use the 1ZZ coilpacks or it doesnt work. As the return signal from the coilpacks is different. No such problem on a Link or Haltech etc, but again, sometimes they have bespoke options like the BEAN protocol thing to make the fuel gauge etc work in the Altezza plug and play. (A feature that the wire in ECUs dont have, so people actually bodge these into other Toyotas that would otherwise benefit from a wire in) TL;DR: It's a lot of work for not much benefit unless its a special case.
  8. Roman

    64Valiants 1969 low light kombi

    Thanks for taking time to put together the post(s) about engine assembly, very informative and interesting to read! Please do keep at it, Good Sir.
  9. Roman

    Arduino stuff/ programing/so cheap

    Thanks I'll check that out!
  10. Roman

    Arduino stuff/ programing/so cheap

    Yeah at the moment I've got a whole bunch of shit just thrown together in a housing as individual boards that I want to consolidate. 2 power supplies, teensy 3.6, an opto isolator board and some brightness controls. (LDR & a mosfet) I might try that and stick with the Teensy first and see if I can make a board that works without any unexpected headaches. Then put on big boy pants later on for STM32 stuff. It's just a bit daunting to start with I guess! Need to spend some time learning Eagle or similar.
  11. Roman

    ajg193's 1983 KP61 Sprint

    When someone who isnt me posts a whole bunch of graphs on the internet Although stop labelling and scaling your axes, you're making me look bad
  12. Roman

    Arduino stuff/ programing/so cheap

    I've got to say though it looks great but there's a dizzying array of options. The dev board looks cool but doesnt quite do what I want, so next step designing my own PCB? eeekk That might be a bridge too far for me at this stage.
  13. Roman

    Arduino stuff/ programing/so cheap

    Anyone played with stm32? Considering further scope creeping my project into oblivion haha. Has some awesome graphics processing stuff which makes ui design a lot easier. And its shitloads faster and doesnt need a screen controller board which is my current speed bottleneck.
  14. Roman

    DIY Fuel injection thread.

    Yeah agree, especially if you're fighting VR voltages too. More the merrier!
  15. Roman

    DIY Fuel injection thread.

    Thats 500 cam rotations, not 500 times that a tooth swipes past the VR. You get 4x as many signals as that?