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  1. kellys_eye

    doubt joystick battery

    AAA rechargeables are easily available and, providing you purchase a good quality unit and the corresponding charger, they will last you decades of normal use and repay their purchase cost in under a year (if you are a heavy gamer).
  2. kellys_eye

    Removing Components for Testing versus On Board Testing

    .......... like I'm a brain surgeon because I wear a hat.....
  3. kellys_eye

    Electric Scooter Battery Voltage Display

    Nothing you can possibly do with an ex-household battery tester will match the results you can get so cheaply 'off the shelf' - as per this example...
  4. kellys_eye

    Removing Components for Testing versus On Board Testing

    Apparently the combined knowledge and understanding of 100's of years of PRACTICAL experience (as summed through the ages of the contributors to this thread) still hasn't resulted in an answer to satisfy the OP. Either 'we' are stupid or the OP hasn't the ability to (a) ask the right questions...
  5. kellys_eye

    Transformer ID Needed

    More like 250VA imho. Irrespective, the load would determine this - probably could be established from the rest of the training equipment but I suspect it will be very low for safety reasons. What the load is, however, doesn't necessarily match what the transformer rating is and its physical...
  6. kellys_eye

    Paddle board pump trips power station breaker

    There are devices called 'soft starters' which use a series resistor to limit current but also have a shorting contact across the resistor to remove it from the circuit when the initial surge period has passed. These are commonly available for AC motors but I don't recall seeing one for a 12V...
  7. kellys_eye

    Removing Components for Testing versus On Board Testing

    No one has to take anything I say with any credence whatsoever. I offer my decades of experience 'free of charge' for those who care to take advantage of such hard-gained knowledge. People can feel free to ignore it and continue in ignorance if they wish. No apology necessary - if you browse...
  8. kellys_eye

    Transformer ID Needed

    And what 'equipment' is it?
  9. kellys_eye

    Transformer ID Needed

    Finding an identical transformer will be difficult - try contacting the OEM if there's any identification on the equipment. The alternative is to discover what the secondary voltages are (were) which is potentially possible from observation of the other interior parts of the equipment. Once...
  10. kellys_eye

    Removing Components for Testing versus On Board Testing

    My POV on 'practical' is actually DOING something rather than endlessly discussing it in what seems to be a manner of trying to shorten the learning process or bypass it by some mysterious way. It can't be done. Either learn the theory and apply it or actually DO it and gain the experience...
  11. kellys_eye

    Transformer ID Needed

    Is it from a dud UPS device perhaps?
  12. kellys_eye

    Stairs light Timer

    The item I linked to doesn't require a neutral wire at the switch location. Straight swap-out for the existing switch.
  13. kellys_eye

    NPN transistor substitute

    It's only the dissipation that's 'lacking' in those specs but any decent system designer wouldn't be running a transistor close to its limits anyway so you'll probably get away with it.
  14. kellys_eye

    electric kettle shorts

    I have a suspicion that the OP was switching the kettle on without any water in it and the thermal cutout was tripping almost immediately. Once they put actual water in it worked as it should. After they had dried it out of course. The OP's response to people taking time to help - despite the...
  15. kellys_eye

    Removing Components for Testing versus On Board Testing

    All I know is that those who spend all their time questioning and discussing what they'd LIKE to do never actually get around to doing anything worthwhile or practical. Step away form the keyboard and actually TRY doing it.....
  16. kellys_eye

    Giant Magnet Question

    Technically it won't work as the steel will contain the magnetic field and prevent it from 'entering' the tape - much like a Faraday cage will protect electronics from an EMP. Equally he wouldn't get sufficient magnetic field density using a car battery. Plenty of current, not enough voltage...
  17. kellys_eye

    Stairs light Timer

    Makes me wonder - what happened to those plain, simple, reliable pneumatic stair light controllers..... https://www.screwfix.com/p/elkay-400a-pneumatic-time-delay-switch/68088
  18. kellys_eye

    Downloading programs from Microcontrollers

    As above however if you look at the size of the memory devices you might see they will contain anywhere between 2048 bytes of code and 4 MEGA bytes of code. Getting the code out is one thing - the time taken to decipher it could be astronomical!
  19. kellys_eye

    electric kettle shorts

    Thanks for wasting our time.
  20. kellys_eye

    Dc step up

    Is this a 24V or 48V unit? Sounds like the 48V version going by your figures???? In which case this might sound daft but you should just use an ordinary inverter on your alternator/RV battery and apply the AC output to the 'grid' input of the Growatt unit. But if you do this you already have...
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