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  1. kellys_eye

    I know nothing...

    Your pump is rated at around 55W. Your batteries may consist of 3 x 12V in series (to give 36V) but they could equally be wired in parallel to give 12V at 30Ahr. Using a suitable inverter you could power the pump for a theoretical 6.5 hours but, in practise this would be around 4 hours 'at best'.
  2. kellys_eye

    Pioneer multi disk player model PD M601. Where is the volume control?

    It's operated by remote control - do you have it? Download the user manual - available online.
  3. kellys_eye

    Kam amp repair

    Precise make/model?
  4. kellys_eye

    Capacitor question

    If it really does read 704μF I'd test its ESR as this high a reading (from its 'normal' value) is symptomatic of poor ESR.
  5. kellys_eye

    I know nothing...

    20 alternators would mean 20x the effort. The human body can produce about 100W (the output from ONE very good quality bike alternator) with a very vigorous pedalling exercise. If you can keep that up for an hour you'd be in the Tour de France team. Even solar panels wouldn't be satisfactory...
  6. kellys_eye

    clicking from main board on a panasonic TX-42AS650B smart tv

    Can you see a picture - use a torch and look at the screen from a sharp angle. If the backlight isn't working you can, if you're careful, still see the picture. Either way, the clicking is from the over-current protection circuitry (the power supply constantly tries to 'start' but is shut down...
  7. kellys_eye

    Ultrasonic Cleaner Isonic P4820 not working

    Yup, got that one wrong.... I was looking at the pictures and thought I saw a 'winding' - they are, as you suggest, piezo disks. You'd need to 'scope the signal across them to see if they're working.
  8. kellys_eye

    How can I test a xlr charging port

    Use the charger the manufacturer recommends. If a charger is fitted that has insufficient amperage then, if the batteries are quite flat (and open terminal battery voltage is not a reliable method of testing their charged status) then when it comes to applying a full charge current the charger...
  9. kellys_eye

    Wanting help fixing bench power supply.

    You found what I was proposing - a shorted diode across the output terminals (although the diode may well have been situated on the circuit board). The purpose of the diode is to prevent applying an external voltage, in the wrong direction (i.e. polarity), to the output terminals - under which...
  10. kellys_eye

    MOSFET burning up but similar circuit on another board is fine

    Choose, specifically, logic-level MOSFETs that are designed to be fully saturated at the appropriate logic voltages (5V). They are common enough.
  11. kellys_eye

    I know nothing...

    BIKE!! I presume you mean a pedal cycle? In which case 1. you will likely be arrested for using a 1000W LED (as mentioned, serious risk of blinding someone) 2. an alternator on a bike wheel might produce 10W if you're fit! It would be meaningless and pointless. Are you sure you know what...
  12. kellys_eye

    I know nothing...

    In theory around 20 minutes. In practise a lot less since, depending on the battery chemistry, you'll be limited on the rate of discharge and/or the depth of discharge. An alternator, suitably driven, could easily supply the WHOLE supply current (28A) - many car alternators are rated at 65A so...
  13. kellys_eye

    Help copying program from C167CR Chip

    With the battery flat you lose the stored values every time you switch off. I'd have picked up on the battery as an issue earlier but it's such a 'basic' thing I thought you'd have already checked it!
  14. kellys_eye

    HELP please OTL tube headphone amp (again)

    I reckon your problems stem from not having the component designations written down, C1, C2, R1 R2 etc even the tube socket pins aren't numbered! Do you have a drawing of the layout of your capacitors even?
  15. kellys_eye

    Motherboard Power

    The slot may be RAM sized but the pin connections are certainly not as per a RAM slot designation. It's just a convenient means of accessing the 'PC' i/o through a 'standard' socket rather than having to design a specific part for it. You can get those System boards in all sorts of RAM socket...
  16. kellys_eye

    Ultrasonic Cleaner Isonic P4820 not working

    Check its continuity. If it measures low ohms then it's probably ok and the fault could be in the control board.
  17. kellys_eye

    Help copying program from C167CR Chip

    The battery will be backing up some RAM which may just be a clock but could equally be some calibration software (again in RAM). If the unit is programmable (front panel buttons?) have you checked any parameters such as the 'set temperature' etc? Battery is usually 3.6V. If all units are...
  18. kellys_eye

    Motherboard Power

    Yes a RAM socket - here's one:
  19. kellys_eye

    HELP please OTL tube headphone amp (again)

    Yes, my bad. Can't count! I'd have to draw the whole construction procedure out to follow your build. Have you done simple connectivity tests between the tube base connections? Tubes removed of course?
  20. kellys_eye

    HELP please OTL tube headphone amp (again)

    Yes, the yellow capacitor. Pin 5 to pin 5 - both are anodes according to the device datasheet. Where does it show such a connection for a capacitor?
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