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  1. Martaine2005

    Transformer wrapping

    All the information and formulas are here. Martin
  2. Martaine2005

    12v to 24v absolute beginner

    What are the specs on the chairs original power supply? Or is it a charger too? I repaired one two years ago and the supply pack was huge. I can't remember any of the specs. The 12v to 24v step up power supply converter may not be sufficient. Martin
  3. Martaine2005

    Question: Is my router repairable?

    I’d be very surprised if 1.9 volt over voltage has damaged the router. Was the router ever connected to the UPS while it was being charged? Was the routers polarity reversed, even for a split second?. I would first check for onboard fuse and/or input protection devices. ie diode, fusible...
  4. Martaine2005

    Trying to create a sunrise/sunset power up/down LED strip

    That is a reasonable and accurate assumption. An external power supply is what you need. Martin
  5. Martaine2005

    Missing Battery - adapting replacement

    It is possible with a little investigation. But it depends if you keep it simple and charge the Nikon battery externally on its original charger. Or modify the toy with an appropriate DC jack that can connect to the Nikon charger. Alternatively, you could crack open the toys battery and replace...
  6. Martaine2005

    Safety in situation where Isolation transformer is misused

    Yes, but then it won’t be an isolation transformer! And completely redundant. Merely a 1:1 extension with another transformer in the middle. If the IT has two or more outlets, the normal approach would be to link the earth terminals (outlets only). This Would blow the IT fuse if two devices have...
  7. Martaine2005

    Problem with pioneer sx 315 receiver

    Only you can see what you have in front of you. A picture is worth a thousand words. Do an image search for: Infrared LED Infrared sensor Pin hole camera. Hidden camera. That should get you started. It’s not beyond the realms of unscrupulous owners to install hidden cameras for their own...
  8. Martaine2005

    Safety in situation where Isolation transformer is misused

    There is no reason for him requiring an isolated supply. Other than having a bad audio setup that constantly gives him trouble with ground loop hum etc. Have you asked him why? He may not know and is just copying a sound engineer from a studio environment. Martin
  9. Martaine2005

    Kawasaki Sax-a-Boom Toy Repair

    “Diapers remained unchanged”. You kill me Edd. I sometimes wish the brain wasn’t so powerful at generating images from text! Martin
  10. Martaine2005

    Soldering battery cable to existing solder joint

    A parallel connection is fine if soldered properly and polarity is correct. Supplying two pieces of equipment with one battery will naturally reduce the run time. Martin
  11. Martaine2005

    turn on 2 led via wifi

    Go ahead sir, you have my permission. Martin
  12. Martaine2005

    Extending a Christmas LED lighting cable.

    Those LED strings are cheap Chinese triac controlled and dangerous. Despite the sales description, are 100% NOT waterproof, showerproof or weatherproof. Check for yourself. Go along the string and check the heat shrink. You can insert a jumbo jet (747) between the LED and heat shrink. Each 1/8th...
  13. Martaine2005

    Power supply help for air purifier

    I think it's a torch / flash light. Yes, use a magnifying glass to check the solder joints. Some look like they've never seen solder. Might be a good idea to run your soldering iron over the board. That process alone has fixed more faulty PCBs than actual failed components. What's on the...
  14. Martaine2005

    Power supply help for air purifier

    Nice photo. Can you post one of the solder side too?. Martin
  15. Martaine2005

    Soldering battery cable to existing solder joint

    Ok, upon further reading and a video, these units supply battery power to equipment. 98mAh is awfully small. And if the circuitry is the charger, connecting two batteries in parallel may or may not damage the charging circuit. At the very least, it will take twice as long to charge. But battery...
  16. Martaine2005

    Soldering battery cable to existing solder joint

    What’s the purpose of the 2nd set of wires? To add another battery? Or add another 4 pin hirose connector to control two units from your ‘battery cup’?. Will it short circuit? Not if the soldering is done properly. What’s the purpose of these units? What do they do? Martin
  17. Martaine2005

    Power supply help for air purifier

    Yes, looks like a 'ghost' crack. Well spotted. On a side note, does he mean Ground as being Neutral conductor? If not, use only the live and neutral lines for testing voltage. Please be careful as your lack of experience is pretty obvious. Martin
  18. Martaine2005

    Power supply help for air purifier

    Relay looking thing? Are you talking about the yellow blocks? X2 capacitors. Use your meter in Ohms or continuity range with no power. Check the fuse. (across the fuse). Martin
  19. Martaine2005

    Power supply help for air purifier

    But you have mains voltage to the board? I would expect voltage to one side of the fuse if it has blown. The small yellow disc (MOV) ? Has a crack in it. The coil thing is a choke and probably just fine but check for cracked solder joints. How are you checking voltage to the board? Please...
  20. Martaine2005

    Power supply help for air purifier

    Resize the pictures to about 300kb Or link to them. Martin
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