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  1. kellys_eye

    Bloody cats!

    LOL. So true. Cats are so multi-emotional (making) though. Concern when they get lost (or hurt), endearing what they are playful/entertaining and heart breaking when you lose them. Same must apply to everyone that owns pets. But where we live it would be a huge loss to cat-livelihood to NOT...
  2. kellys_eye

    Electromagnet levitation circuit LED not glowing

    Not necessarily. The error could be in your construction - is the LED fitted correctly etc? Is the rest of the circuit built properly? Only you can tell.
  3. kellys_eye

    Printing on cartoon box with industrial printer

    The best option will be the simplest (potentially cheapest) option. If the printer uses a standard parallel port (or USB) then a cheapo PC running the appropriate software would be required. Otherwise you're looking at the construction, interfacing and programming of a dedicated module. If...
  4. kellys_eye

    Resistor Value

    'Context' will be the key here. Where in the circuit does this part 'fit'? Can we see a picture of the board where it was removed from? Inductors (assuming it is one - and I agree with (*steve*) on this) like that would either be part of a resonant/filter circuit or simply decoupling in a...
  5. kellys_eye

    Make experiments safer, my workshop and concepts relevant in my opinion

    For someone with limited workshop space your approach towards a power supply seems rather confusing. A power unit with dual VARIABLE outlets would be as much as you might need for all your experimentation. Many experimenters workshops will have such a supply AND NO MORE. Individual systems...
  6. kellys_eye

    Solder point unusable (unintentionally removed)

    alternatively - or, as I'd advise, ADDITIONALLY - put a dollop of hot melt glue across the wires to stop them moving.
  7. kellys_eye

    Solder point unusable (unintentionally removed)

    Pictures of the problem would help. I presume your use of the word 'metal' means you're referring to the PCB tracks??? This happens when you apply too much heat to the circuit board and the glue holding the copper to the board melts and allows the track to come away with the solder and/or lead...
  8. kellys_eye

    Electromagnet levitation circuit LED not glowing

    Construction issue? Operator issue? How can we tell?
  9. kellys_eye

    I need user manual

    Second Google result........:rolleyes: - you can't have tried very hard (or at all....). https://elektrotanya.com/dumont_168_oscilloscope_1944_sm.pdf/download.html
  10. kellys_eye

    Resistive touch screen film as sensor.

    Something like the membranes used under cheapo computer keyboards may be more useful. They have the actual 'dots' in an x-y matrix that you could access either directly (through the edge connector x-y connections) or via the data it generates if still connected to the (usual) COB device and...
  11. kellys_eye

    Some doubts about ESD (Electro Static Discharge) protection

    Seconded.
  12. kellys_eye

    Grow Lamp with voice recording and playback

    Quite complicated but resolvable using a small processor. You can obtain MP3 record/playback modules that are of good quality: https://www.adafruit.com/product/1381 and an Arduino processor to access the operation in terms of message selection, timing, exceptions etc however this will require...
  13. kellys_eye

    Programming languages and MC selection.

    You can get generic PIC programmers for only a few $. They require no more than the ICSP connections and are easy to build yourself if you wish. My own PIC programmer uses the Velleman software but isn't actually a Velleman device. Works on every chip I've ever used. But Arduino is definitely...
  14. kellys_eye

    DAB problem with JVC audio ux-d457s

    kinda' suspect why it was 'second hand' now...... Can you get a refund? Or was it 'sold as seen'? You might be stuck with it. Fixing it may be possible but will require test equipment and some tools.
  15. kellys_eye

    DAB problem with JVC audio ux-d457s

    Where do you live? Are there actually any DAB broadcasts where you live? Its coverage isn't 'complete' (across the UK). You may need an externally mounted antenna.
  16. kellys_eye

    Programming languages and MC selection.

    I've used PIC Basic Pro in the past which I found to be very intuitive and very easy to learn. There is (or was.... might not be now) a free download version - limited capabilities of course - for you to get an idea of how it works and the full documentation is also available. It's been around...
  17. kellys_eye

    Transformer - Core area and number of turns?

    You need to know the permeability/reluctance of the transformer core. Check out this page: http://www.encyclopedia-magnetica.com/doku.php/al_value
  18. kellys_eye

    Power supply for 1960s movie projector

    The plug shows 115V supply. Isn't your local supply 240V? If so you will need a transformer to convert the voltage. You may also have issues if the mains frequency isn't 60Hz as well.
  19. kellys_eye

    Replacement for .5 MFD / 300 VDC Capacitor

    Yes, that would work.
  20. kellys_eye

    Premier PHP2026 Massage Chair Repair

    Who said you couldn't? What is the point of a socket outlet that can't take an appliance? Plugging into the USB-enabled outlet won't (shouldn't) have caused the chair to fail - do any other items work that are plugged into the same outlet? Probably sheer co-incidence but the chair looks to...
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