Search results

Search Forums New Posts
  1. kellys_eye

    Ticking sound and won't start VCR

    Yes, that's definitely the noise of an overloading (going into self protection) psu. The fault is most likely on the secondary-side. Check the secondary-side rectifier(s).
  2. kellys_eye

    Bentham 605 Current stabilised Power Supply

    The fact that the schematic has been 'modified' by hand-drawing the FETs in makes me suspicious..... it may relate to a later model and/or upgraded device rather than the original unit. I'd (temporarily) wire in some transistors to prove correct operation first....
  3. kellys_eye

    Ticking sound and won't start VCR

    'Ticking' is usually indicative of a PSU going into protection mode for one reason or other. The fault may not necessarily lie in the PSU itself (as common as that actually is) so if you can disconnect the PSU board output and the fault (ticking) stops then you will need to fault-find the rest...
  4. kellys_eye

    Programming LEDs individually

    You don't need software. Just use two LEDs and two switches. Turn one on today, turn the other on tomorrow. Slow enough?
  5. kellys_eye

    Home Based Income as an Electronics Hobbyist

    Oh, a 'hands-on' approach......? I like that.
  6. kellys_eye

    Home Based Income as an Electronics Hobbyist

    Don't you mean psychics.org?
  7. kellys_eye

    Bentham 605 Current stabilised Power Supply

    Where you have drawn the FET symbols, their connections (i.e. the gate) are connected to the 'board' at points marked 'b' and the sources at points marked 'e'. 'b' and 'e' usually refer to transistor connections - base and emitter, not FET connections.
  8. kellys_eye

    Looking for Precision Resistor Datasheet

    Given the profundity of exact values and even better tolerances that are available, do you need to have the exact device as a replacement? Isn't the right value/tolerance good enough regardless of its 'shape'?
  9. kellys_eye

    Bentham 605 Current stabilised Power Supply

    The board schematic indicates the off-board devices are transistors (i.e. connections to 'e' and 'b'), not FETs. Do you have the part number for the original devices used?
  10. kellys_eye

    Home Based Income as an Electronics Hobbyist

    It's what your right hand's for.......
  11. kellys_eye

    Need help. 7.8v ac

    No.
  12. kellys_eye

    MOTOR DRIVE 48 VOLT .

    Show your schematic. You are probably not driving the MOSFETS to full saturation....
  13. kellys_eye

    Speaker LED lightguide frontplate

    Don't use holes - use audio 'transparent' material.
  14. kellys_eye

    Speaker LED lightguide frontplate

    Pick up any old LCD/LED TV set that has a broken screen - you might find one in the nearest dumpster. Strip the screen for the light diffusing panel which will be as big as the display itself. Cut to size and use. Better yet, remove the LCD part (take out the LCD-only - leave the diffuser/s...
  15. kellys_eye

    Audio signals

    Yes. The range will depend on the analogue filters you used to isolate the required bands you want to display. Basic analysers have band-specific filters that output a voltage in proportion to the amplitude of the frequency component you are filtering and that voltage is used by the Arduino to...
  16. kellys_eye

    CAN Bus

    Check this existing thread https://maker.pro/forums/threads/can-message-intel-and-motorola-format.298500/#post-1837459
  17. kellys_eye

    [HELP]Trying to fix JBL CLUB 950NC...

    Not really. The solder is required for the electrical connection. You could, after soldering it, add some epoxy glue to give the socket additional mechanical security but it must be soldered first.
  18. kellys_eye

    Simpson 260 multimeter completely dead

    It's always gives satisfaction to restore older equipment to working order. It's a useful tool and will remain so for many decades after the electronic stuff has failed - which is either not cost-effective to repair or spares would be impossible to source. Nice job, good outcome!
  19. kellys_eye

    [HELP]Trying to fix JBL CLUB 950NC...

    The proper 'glue' is solder. Nothing else will work. You need solder, flux (or flux-cored solder) and a soldering iron.
  20. kellys_eye

    Simpson 260 multimeter completely dead

    I doubt a device like that would be required to be 'lab' quality (tolerance) as digital meters offer a far better solution these days. As a general purpose meter, used appropriately (i.e. with due regard to its limitations due to internal resistance) it will serve as a decent test meter. I...
Top