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  1. kellys_eye

    Cannot connect to my router

    Swap the Rx and Tx connections
  2. kellys_eye

    Faulty usb-port

    Difficult to tell from the photo but if my eyes aren't being deceived there are some tracks that have been pulled off with the original USB socket. This isn't insurmountable as you can extend the missing parts using lengths of wire but you're looking at some fairly 'responsible' soldering using...
  3. kellys_eye

    Replacement transformer

    Show some pictures of the power supply board.
  4. kellys_eye

    Circuit design

    Does it have to be designed from first principles or can you just use an off-the-shelf product that has been designed for the purpose? Is this some college/school task?
  5. kellys_eye

    What solid state components can switch composite video (AV)?

    Use the KISS principle - keep it simple. The relay solution will work just fine. Proper design will prevent shorting inputs and outputs that aren't meant to be shorted.
  6. kellys_eye

    Wacom Cintiq death

    Could be anything but it sounds 'fatal' to me. Possibly dislocated the LCD connectors, damaged the backlight etc. If you hold a torch up to the screen at an acute angle, can you see any displayed data? If so then it's 'only' the backlight that is damaged. If the backlight is by CFL then you...
  7. kellys_eye

    DEFY magnetron - stuck with removal?

    You might need the use of an impact screwdriver to 'shock' the bolt/screw loose but whether you (a) have one or (b) can get it in there to do the job!
  8. kellys_eye

    Help with an inductive heating circuit!

    Show us your coil. Most such inductive heating coils require the object to be INSERTED into the coil - yes, you will get power 'close' to the coil (sufficient to light an LED) but if your coil is what I think it is then you won't get anywhere near the maximum power transfer required to do...
  9. kellys_eye

    Ac-dc power inverter quad output

    Hi and welcome to the forum. Not easy. You could trawl the likes of Alibaba to find something: https://www.alibaba.com/trade/search?fsb=y&IndexArea=product_en&CatId=&SearchText=smps+open+frame+12V+300W&viewtype=G but with that type of product you might want to look at over rating the output...
  10. kellys_eye

    Yamaha Stereo transformer

    Power it up. Measure the open-circuit secondary voltage i.e no load. The add a load until the output drops by 10%. This will be your safe maximum load. Use 12V bulbs (in series/parallel connection for an easy-to-make load i.e. 12V 10W (or 25W or even 55W car side light/headlight bulbs)...
  11. kellys_eye

    Sony CDP CX355 Megastorage CD player

    Obviously you did something to disturb the setting/alignment of the mechanism when changing the belt. Best idea would be to disassemble the unit again and observe the movement repeatedly until you can 'see' what's NOT happening when it should.
  12. kellys_eye

    Can someone tell me why my powerbar/powerstrip didn't blow up

    The 'power adapter' isn't a power CONVERTER. All it appears to do is change the PIN type on the input-to-output side from round to flat. Some electronics have a very wide input voltage range - some will work using anything from 100V right up to 250V whilst some are VERY specific and will ONLY...
  13. kellys_eye

    Must unplug and replug power to make Cooker Hood / Kitchen-Fan work

    The push buttons, being located ABOVE the cooking area, may have crud inside them that is affecting their operation. Can you dismantle the button unit enough to see inside and check for dirty contacts? If a replacement button panel is available it may be cheaper than the circuit board BUT...
  14. kellys_eye

    FM & LED shop lights

    Changing the antenna won't make any difference - possibly just make it worse! The interference is obviously from one of the LEDs producing harmonics in the 88-108MHz range, specifically at that particular station frequency, and a 'better' antenna will only pick up a 'better' signal - even if...
  15. kellys_eye

    Yaesu FRG-7 vintage budget comms. receiver

    VFO stability is key to the receivers operation and as Steve suggests this could be down to a simple issue with supply regulation. A frequency counter would be useful to test the various oscillator outputs (given that there's a quite a few of them!) and it's not easy to do with just a scope...
  16. kellys_eye

    Yaesu FRG-7 vintage budget comms. receiver

    What test equipment do you have?
  17. kellys_eye

    Hi, have anyebody had trouble building the ELENCO 108 AM/FM RADIO KIT

    Resolder ALL the wires, components and connections then post a new picture of the soldered board.
  18. kellys_eye

    Hi, have anyebody had trouble building the ELENCO 108 AM/FM RADIO KIT

    Soldering. Entirely down to poor soldering. Fix the soldering and it will (possibly) just work.
  19. kellys_eye

    Amp for Visaton FR 13 4 ohm speaker

    The speakers rated power is 30W - a decent amplifier of 25 to 30 watts RMS output will do it justice. There are many modules and kits available on-line. You can even Google search for "30W audio amplifier schematic" and get a few hundred results. You will need a decent power supply to power...
  20. kellys_eye

    Sta-2100D

    Pictures? Schematic?
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