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  1. kellys_eye

    Introduction of a 40yr old beginning

    If you're UK-based then there is a company I always recommend - ESR Electronics (no affiliation, not in receipt of any bonuses!) - they have a great range of components at good prices, are prompt with deliveries and very helpful. They also have a range of kits of various types that include...
  2. kellys_eye

    Introduction of a 40yr old beginning

    Stick with batteries! There's a lot to be learned - their chemistry, their make-up, their connection, protection, charging, discharging, maintenance etc etc and it's a growing field of expertise/learning. I suggest a lot of the more experienced members on here do as I do - drink tea and read a...
  3. kellys_eye

    Need help troubleshooting control board

    Manufacturers have always been loathed to disclose any information about their products - IPR (intellectual Property Rights) they claim, although there is a legal case to try to force manufacturers to be more forthcoming. Even then, they'll just make 'impossible-to-source' parts (such as that...
  4. kellys_eye

    Cat 6 Ethernet Cable data restriction?

    Clearly the issue is the cable. Is it SCREENED cable? Where did you source it? Sure it's 'legit' cable (lots of fake stuff exists). Some so-called copper wire cables are actually aluminium with a copper coating! Can you compare the commercial cable, physically, with yours? Try making up a...
  5. kellys_eye

    Need help troubleshooting control board

    The other area of 'concern' would be the main switching transistors that are likely under that other large heatsink. It looks very much like a manufacturer-specific device too which means that, assuming you can identify it (connections/datasheet) and make the relevant tests, you're unlikely to...
  6. kellys_eye

    Need help to identify this zener diode

    'course not! I detect some embarrassment from the OP at being pointed in the right direction rather than making incorrect assumptions and doubling down on them.
  7. kellys_eye

    Need help troubleshooting control board

    If you want to do some basic test/checks then you'll need a 'decent' multimeter. Do you have one? Assuming you do, we can start at 'first principles' and check the rectifier on the left-hand edge of the board.
  8. kellys_eye

    Need help to identify this zener diode

    (You're) He's welcome........
  9. kellys_eye

    temperature control switch

    Items marked 'R' are resistors, 'C' are capacitors and the RGB devices are multi-coloured LEDs. The 8-pin device is a microcontroller (unknown) but could be replaced using any propitiatory controller with the appropriate code. We don't know what the device you show actually does (in terms of...
  10. kellys_eye

    Need help to identify this zener diode

    Care to share that info? The forum welcomes such information for possible future reference.
  11. kellys_eye

    Cat 6 Ethernet Cable data restriction?

    CAT cable is twisted pairs and they MUST be made up according to the correct colour wires to the correct pins in the RJ45 connector else you lose the 'twist' which is there to eliminate crosstalk and interference and maximise speed. Your own wiring 'system' is not good enough.
  12. kellys_eye

    PCB SERVO

    Your best chance would be to find an identical device on eBay or somesuch site and either strip it for spares and/or just use the replacement device - assuming it works. Of course, repairing the existing servo board is another option. Can you post a pic of the servo board?
  13. kellys_eye

    battery pack question

    NiCads suffer from crystal dendrite growth which 'shorts out' the internal chemistry and both reduces the cell capacity to hold a charge and increase the current that flows through it when trying to charge it. If your charger is smart enough it will limit the current but even if it limits it to...
  14. kellys_eye

    Wood/Resin Bowl RGB Lighting Question from a Novice

    To sell them you would (strictly speaking) have to seek and obtain CE certification which wouldn't necessarily matter if the light source itself already had it. Rules and regs surrounding safety are, as you'd expect, very strict.
  15. kellys_eye

    PCB SERVO

    Got a part number? Schematic? Have you contacted the manufacturers? Is the board itself repairable? Sure the board is dud? etc
  16. kellys_eye

    NPN reverse bias reading

    Try testing it dynamically. With 12V applied to #1 and #4 connected to 0V, apply a positive voltage (via a resistor) to #3 and measure what happens at #2. The voltage at #2 should fall to (typically) 2V for an IGBT, less for a standard Si transistor. Of course, if the voltage at #2 doesn't...
  17. kellys_eye

    temperature control switch

    Based on the above - just buy as many as you need. Designing and building your own is easily achievable electronically but the physical aspect takes a lot of research and might even involve having your own parts made if there's nothing on the shelves that can be used directly.
  18. kellys_eye

    Life fitness f3 motor works (tested) belt won't move help

    The electronics controlling the motor is probably faulty. Maybe the power supply. Nothing we can advise you unless you have access to test equipment of experience in taking measurements and working with potentially fatal voltages......
  19. kellys_eye

    Need help to identify this zener diode

    As above - my comment had nothing to do with the glue. I recognise a dud capacitor by years of experience and C2 is dud. This is a very common issue with SMPS's and nearly always the cause of non-working. In most cases it doesn't otherwise affect the remaining circuitry so you may be leading...
  20. kellys_eye

    Need help to identify this zener diode

    The diodes may not be the problem - C2 is clearly damaged (exploded) and needs to be changed.
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