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  1. kellys_eye

    Injector driver

    You can't just measure something coming out of the sensor - it may well be a signal that requires amplification or other processing before it can deliver the correct signal. As a stand-alone sensor that small voltage actually sounds correct...... normally you'd have 5V applied to one side of...
  2. kellys_eye

    Realistic STA-2270 amp

    The original post was TEN YEARS ago - you'll be lucky to get a response!
  3. kellys_eye

    Injector driver

    Tried another ECU? Have you considered opening the one you have and executing any necessary repairs? It's not impossible! Sourcing another 5V signal should be easy enough - many of the other ports will output 5V. Find one that is present when the ignition is on and parallel off it. Is the...
  4. kellys_eye

    ttl and hall sensor

    The implication is that the Hall Sensor itself doesn't necessarily output a logic level signal suitable for the detection circuitry (operating at TTL voltages - look it up) and that some form of 'level change' is to be applied to make them compatible. In any digital circuit you may have to...
  5. kellys_eye

    Phillips TV just died 42PUS7809/12

    It's always interesting and satisfying to locate and repair a circuit to component level - it's a skill set that is sadly in decline these days. That said, the KISS principle applies too (keep it simple, stupid) and replacing the board to get the set working is far quicker than learning the...
  6. kellys_eye

    Injector driver

    You still haven't indicated which make/model ECU you're using. It might help if we could reference the datasheets/manual to see what might be causing it. Have you eliminated wiring issues? programming/setup issues? If so the the ECU might have a software problem (try reprogramming it) or the...
  7. kellys_eye

    AppleCarplay DIY

    Here's a 1DIN unit (from Walmart). Sure, it won't look like it's meant to be there but, imho, neither does the one you already have fitted!
  8. kellys_eye

    Injector driver

    In the first rotation (360 deg) three cylinders will fire off in their appropriate sequence (1,5 and 3 for example), the other three (2, 4 and 6)in the next 360 degree rotation. For each rotation you therefore only need to inject fuel to the three cylinders that are GOING to fire so you fire...
  9. kellys_eye

    AppleCarplay DIY

    Seems a bit pointless as you won't be able to reach across to use the touch screen capability necessary to implement any functions..... could you even get a finger in there? Programming to achieve any good use would be a b****h. Why not just replace the existing audio unit with a modern...
  10. kellys_eye

    49" monitor repair help

    You should be able to download a screen test program (there may be one built in to the monitor menu too) where you can display static images of fixed colours, bars, grids etc to make visual test of functionality. With a static 'black' screen you can them press around the borders of the screen...
  11. kellys_eye

    49" monitor repair help

    ...... is why I assumed you had one..... a little lack of clarity! That the fault seems to localise to one of the main colours (red, blue, green) might be a clue... Are there different signal input ports you could try an alternative input on?
  12. kellys_eye

    49" monitor repair help

    If you have two identical monitors then swap out the boards individually until you find the one that's causing the issue. This is the only 'simple' method of reducing the potential problem to just one board without resorting to some sophisticated test equipment.
  13. kellys_eye

    Injector driver

    It fires three on one part of the engine cycle and three on the other. The fact that it fires into a 'non-ignition' port is irrelevant as that fuel is drawn in on the next 'cycle' - the time difference between each cylinder cycling through an 'intake' is so short it doesn't make any real...
  14. kellys_eye

    Example circuit in datasheet for LED driver doesn't make much sense to me

    The additional use of row/column driver transistors is specified for different 'power level' displays - i.e. if you use a larger segment (dot) type display you will need to increase the current handling capability of the driver lines of the controlling IC hence the use of additional transistors...
  15. kellys_eye

    Injector driver

    How are you testing this? By pure observation or by using some form of electronic monitoring device like an oscilloscope? Which model of ECU are you using? What technical details can you post here? (links etc). Can you show the actual injector arrangement? Are you 100% certain the injector...
  16. kellys_eye

    Injector driver

    I've often wondered myself..... there are loads of very effective DIY replacements for ECUs on t'internet and they are as credible as the OEM stuff as far as capability is concerned. AFAIK all you have to do is be within the emissions spec of your relevant country for the ECU to 'pass' muster...
  17. kellys_eye

    Finlux tv problem

    99% of the time a power supply issue. Either related to the PSU itself or as a result of an internal problem (commonly the backlight) developing a fault. Many internal faults can cause the PSU to 'shut down' and the flashing light is the only information you get.
  18. kellys_eye

    Injector driver

    Then your ECU is faulty....... the injector control should be a functioning part of the ECU and needs to be investigated properly if it's not working as it should.
  19. kellys_eye

    Example circuit in datasheet for LED driver doesn't make much sense to me

    When multiplexing LEDs it is common to overdrive them to achieve the required light output - given that the strobing process is a very short mark-space ratio, the actual driving current pulse can be many times the rated, steady-state, value of 7mA.
  20. kellys_eye

    Phillips TV just died 42PUS7809/12

    Very unlikely (imo) the fault spread to the other board. Never any guarantees though....... but it's rare.
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