Search results

Search Forums New Posts
  1. kellys_eye

    Simple Metal Detector Circuit Keeps Beeping - Help

    That looks suspiciously like UN-enamelled copper wire making up the coil - it's also very 'thick' wire. What are the specifications for the coil?
  2. kellys_eye

    Help how to calculate a LED wall 10 M2

    I suspect the 'wall' is an industrial device intended for outdoor displaying. If the OP thinks they can use this indoors the perhaps they are seeking a quick sun tan as they view!
  3. kellys_eye

    100K capacitor = 100pf?

    Which Fluke? Does it read accurately with other known-capacitances? I'd like to see the schematic for the circuit in question to see how they can justify using 100pF on a 15V regulated line.....
  4. kellys_eye

    Electric ICE Exhaust Cut-out... why? and how?

    Most problems I've seen with headlights are to do with their alignment more than their brilliance. The annual test for cars (MOT here in the UK) is supposed to test such alignment and fail the vehicle if the beams don't shine according to the spec - beam width, height, angle etc. That and the...
  5. kellys_eye

    Roland E68 keyboard intermittent sound

    Alcohol - specifically IPA (Isopropylalcohol) widely available. Small aerosols of 'quality' contact cleaning solution are also available. Check out electronics suppliers for such.
  6. kellys_eye

    Help how to calculate a LED wall 10 M2

    800W per 1m2 (my bold/underline) 10m2 means 10 x 800W = 8kW = 33A from a 'domestic' outlet? You can, for sure, get a 40A circuit fitted (showers use this, some use 63A) but there was also a mention of 142m2 display........ :eek:
  7. kellys_eye

    100K capacitor = 100pf?

    ....a 10mm wide capacitor on a 15V regulated supply line and 100pF??? Something is wrong with this... all the 100pF capacitors I have (rated at 50 to 100V) are 5mm in diameter and around 1mm thick.
  8. kellys_eye

    Electric ICE Exhaust Cut-out... why? and how?

    The moderation decision to close the original thread appears - to me - to be based on personal aggrandisement... ...but of course, this isn't 'my' forum and I have no power to rescind such judgement. I can, however, express my concerns that such decision making should be impartial rather than...
  9. kellys_eye

    Roland E68 keyboard intermittent sound

    The velocity-sensitivity is derived from detecting the speed at which a contact closes therefore your assumption that some cleaning may be required seems quite valid. Such contacts are often made from phosphor-bronze (potentially gold-plated) wires so any cleaning must be done with regard to...
  10. kellys_eye

    Help Identifying 30 Pin PCB Connector?

    JUST the amplifier? There are pin designations alongside the connector that identify the relevant signals on each pin, many of which have nothing to do with the amplifier part so could be left unconnected thereby simplifying any soldering that may be required. The connectors look to be...
  11. kellys_eye

    Help how to calculate a LED wall 10 M2

    For 1m2..... The basic panel size is 10m2 and the OP is also talking about one that is 142m2...:eek:
  12. kellys_eye

    HT9032D

    Removing the connection doesn't define the logic state - it needs to be either tied to Vcc or ground, not 'floating'.
  13. kellys_eye

    Electric ICE Exhaust Cut-out... why? and how?

    So if the OP wrote "I'm considering making a noisy valve device" or "if I wanted to make a valve to open a flap on a pipe...." the thread would remain open but because he said he wanted to make one (that happened to be on a car) it was closed? I get vehicles charging past my place with...
  14. kellys_eye

    Ozone generator unable to reset"Service light"

    What, precisely, is the actual method used to 'reset the service light'? How does the device detect that a service is required? i.e. what input signal is applied to the μC to tell it that a fault has occurred?
  15. kellys_eye

    HT9032D

    You won't use Pdwn when the device is in use - it is a function to lower device power consumption when 'idle'.
  16. kellys_eye

    Electric ICE Exhaust Cut-out... why? and how?

    Personally, I can't. If we're not careful then our consideration for 'illegal' could shut down many threads. There's numerous threads on LED driving - potentially 'illegal' for 'indoor growing.....' there's a thread on sequential triggering - potentially to drive a rail gun (weapon) that...
  17. kellys_eye

    100K capacitor = 100pf?

    I'd like to see a picture of the capacitors in question. My own opinion is that they should be 0.1μF 15V?? Regulator??? We're talking something like a pre-amp supply in a solid state circuit so 100pF????????? Could be a problem with the way they're being measured????
  18. kellys_eye

    Help how to calculate a LED wall 10 M2

    For 10m2 and a power consumption of 800W/m2 this equates to a total consumption of 8000W - easily possible via a standard domestic supply (actually, that really depends on your local situation - it varies country-to-country). 142m2 would mean 113,600W (113kW) an enormous amount and such a...
  19. kellys_eye

    Exhaust Switch Project HELP!!

    What motor arrangement do you have right now? Can it move/stop with the application/removal of power - doesn't seem to be the case as I understand it. Seems like it's wired for end-to-end motion only. In which case you'll need some form of 'feedback' to report the intermediate position of the...
  20. kellys_eye

    Help how to calculate a LED wall 10 M2

    If you think about modern PC's and the power modules fitted to them they can easily supply 800W for the graphics-hungry type of PC yet the 'box' that makes up the PSU is only some 6"x4"x4"..... such is 'switched-mode' technology. You can't reduce the power so you're stuck with it. Most...
Top