Search results

Search Forums New Posts
  1. kellys_eye

    Brake light strip resistor identification

    Given the LED max current of 70mA it would be prudent to under-run them (for longevity) so a reduced current (say 50mA). At a nominal 12V supply (car battery) the series LEDs will need to drop around 2V to work properly. Dropping 2V at 50mA means a resistance of 40 ohms. I suggested those...
  2. kellys_eye

    PSA EGR Emulator

    A PWM pulse stream will have an average DC value depending on the width of the pulse irrespective of its frequency so all you need do is rectify (if it was 'ac' - but in your case it isn't so no rectification needed) ) and smooth the pulse stream using a resistor/capacitor filter. This will...
  3. kellys_eye

    Brake light strip resistor identification

    Looks Brown, Blue, Black to me = 16 ohms. Irrespective - if you figure out how the LEDs are wired (series, parallel or a combination of both) you can use a simple LED resistor calculator to determine what's required. Show the whole board and, ideally, so we can see the tracks and how the LEDs...
  4. kellys_eye

    Dummy Load

    I see this as a system that detects lamp failure therefore monitors lamp circuit current. Replacing a filament lamp with an LED reduces the current such that a 'fault' is detected. If this detection is part of software it would be difficult to 'fix'.
  5. kellys_eye

    PSA EGR Emulator

    All the potentiometer is doing is reporting the position of the motor (flap) back to the ECU. It's effectively a very basic servo system (as might be used in any radio control model). The flap (motor) position isn't decided by the potentiometer rather than by some other signal (probably engine...
  6. kellys_eye

    matched impedance question

    Either short the reed switch out or put a magnet to it. It will simulate the door being open/closed. 5V or 4.88V doesn't mean diddly squat. It's the same thing as far as a detected signal is concerned.
  7. kellys_eye

    How Do I Use This Device

    The full part number includes the 'M4' bit (which indicates a 4-digit coding) that is also detailed on the datasheet (which happens to cover every version of the device in question).
  8. kellys_eye

    Dummy Load

    Connect a resistor across the LED of a value sufficient to match the current flow in the original lamp circuit. This assumes your LED is a 'modular' one i.e. is in a package that works when supplied directly from 230VAC. i.e original lamp (4W @230V) draws 17mA. Your LED draws ??? Your...
  9. kellys_eye

    Identify diode (SMD)

    As good a guess as any - and with the value stated (15V-ish) it seems appropriate. Like I said, the circuit should work without it if all you want to do at this stage is to prove you fixed the fault (whatever that was).
  10. kellys_eye

    matched impedance question

    I've never seen a 5V resistor - got a link?
  11. kellys_eye

    Need help troubleshooting control board

    Edd's post(s) are very comprehensive and include much information to get you on your way. Have you read through them and done all that is asked? Your reply doesn't give us much confidence that you've either understood what was offered nor done any suitable testing - certainly we've had no...
  12. kellys_eye

    Identify diode (SMD)

    Hmmm, still can't find anything other than references to TVS (transient voltage suppressors). If it is such a device then the circuit could, theoretically, work without it being in place as it's only there to protect against spikes that 'may' occur. You could do worse than put in 'any' TVS...
  13. kellys_eye

    How Do I Use This Device

    Rule 1 - don't buy anything you don't have information for (you wouldn't buy a car without knowing what engine it had or what colour it was etc would you?) Rule 2 - search for a data sheet - it took me under a minute to come up with this...
  14. kellys_eye

    Driving line voltage LEDs

    Show how the PSU connects to the LEDs. Is it one pair of wires or are there more than two wires going to the strip? I 'think' I can see 'W+' on the strip (perhaps there's a 'Y+' there too?). If this is the case then simply joining W+ and Y+ will make both come on at the same time (assuming...
  15. kellys_eye

    PS-LX350H Sony Turntable no motor movement

    The AC goes to the main PCB via the yellow wires so if the AC is present and the motor still isn't turning then you need to follow the supply wires to that PCB, remove it, photograph it and post it here. Is the platten 'direct drive' or is it via a belt? guessing here - but the board with the...
  16. kellys_eye

    Wood/Resin Bowl RGB Lighting Question from a Novice

    If you want 'remote' then you have little choice but to use those 'tapes' as they come with them. Individual LEDs (like in the link) can be powered from a small battery pack or wall wart (power pack) which provides the safety you require and mitigates any CE regulations.
  17. kellys_eye

    Class B Viking B-2 Transformer Schematic

    The blue-red-brown wires are likely the secondary and look to be a low voltage x-0-x output (i.e. centre-tapped AC secondary). The primary is (guessing) wired for 220 or 240V (black-blue or black-yellow respectively) with the other two potentially being taps at lower voltages (perhaps...
  18. kellys_eye

    220v AC from genset to 300vDC converter 3000W

    No, don't do that. With the AVR working you'll have a steady output and not suffer transients as you would without it. Not that a DC rectified output would even notice.......
  19. kellys_eye

    PS-LX350H Sony Turntable no motor movement

    I'm assuming the transformer with the brown/white leads is the original? The brown/white are the mains input and the yellow is the secondary. The new transformer has yellow secondary leads too, the primary has red and 'some other colour' (I can't see). Assuming you connected it correctly (not...
  20. kellys_eye

    Identify diode (SMD)

    Could be a transient voltage suppressor (63V). Can you show more of the PCB so we can get some context?
Top