Search results

Search Forums New Posts
  1. Martaine2005

    Buzzing Makita DC1414 F charger

    Hi CirKit, The free (slow) D/L doesn’t work. Can you describe the buzz?. Is it only when the LED flashes?. Is it definitely a buzz rather than a high pitch tone? Martin
  2. Martaine2005

    Different voltage displays on different charge controllers on same battery

    Nothing to worry about. Even the same two meters will vary slightly. Martin
  3. Martaine2005

    Different voltage displays on different charge controllers on same battery

    Nothing is wrong and they both seem fairly accurate. Average it as 12.8V. Unless either unit has been properly calibrated, you won’t be able to tell which is closer to actual battery voltage. But 12.7V vs 12.9V, I’d be happy with either. Martin
  4. Martaine2005

    5v - 2A power supply causing damage

    WHITE is Data - (negative) BLACK is signal - (negative) Did you connect the devices when you had the WHITE as - (negative)? Martin
  5. Martaine2005

    Power supplies not working on Sony ICF-SW7600G

    Hi, there would be the usual suspicion of electrolytic capacitors. This Youtube video may confirm this. Martin
  6. Martaine2005

    5v - 2A power supply causing damage

    Yes, I understand that. But did you connect ‘BLACK’ first as negative, like your first drawing?. Martin
  7. Martaine2005

    5v - 2A power supply causing damage

    Can you please answer post #19. The answer may be there. Martin
  8. Martaine2005

    Trying to use existing 18v li-ion charging cradle

    If the diode is shorted both directions out of circuit, it is most definitely defective. Martin
  9. Martaine2005

    Trying to use existing 18v li-ion charging cradle

    What device is on the heatsink?. I can’t see that PSU being very accurate unless it has other circuitry on the other side. Have you got continuity/diode setting on your multimeter?. Have you checked the output cable for a short?, these cables often get twisted over time and the insulation...
  10. Martaine2005

    Happy new 2021

    Yes, Happy new year to all. I certainly could do with a new one. Martin
  11. Martaine2005

    Stage Line 500W amp repair project

    Are the output transistors new? Have you checked them for shorts?. This has a few pages to read up on. But was working without output transistors?. Martin
  12. Martaine2005

    Boxing day sales!

    Santa and covid looked after you this year. The 'wife' couldn't spend it all with shops closed and lockdown. Martin
  13. Martaine2005

    Texas Instruments Speak & Math freezing

    And the component side?. That will tell us more. Was there screws or clip in plastic? I have checked the cupboards here and can only find Action man, sindy and Barbie. But I found a “penny puppy walker”. The batteries had leaked but still worked. Now I have to clean her lol. I love old...
  14. Martaine2005

    Texas Instruments Speak & Math freezing

    Nice find @bertus I couldn’t find a single picture. But then again, I have one in a cupboard somewhere. Martin
  15. Martaine2005

    zebra strip to metal lead lcd

    Why not replace the strip?. Here you can read all about them. Ebay has quite a few. Just check the length height and PCB pin spacing. Martin
  16. Martaine2005

    Replacing LCD instrument readout with LED readout.

    You Ok Ed?. Or am I missing your usual joyous self?. Martin
  17. Martaine2005

    Texas Instruments Speak & Math freezing

    Hi bflo Does this game have a VFD (vacuum fluorescent display)?. You’ll have to open the unit. Depending on model, it could have a separate PCB which is the power supply. Visually inspect the board for corrosion, leaky electrolytic capacitor or signs of heat. Then check both boards for...
  18. Martaine2005

    Help with LCD 4 digit display

    Merry xmas Bobwa3, Filter caps can have many different results depending on circuit design and of course the filters. Ranges from ‘non turn on’ to ‘hum’ to Out right short circuit. All of which should have been accounted for. Most are pretty obvious in amplifiers. But a scope would show...
  19. Martaine2005

    Which pole is up?

    What else makes them? Martin
  20. Martaine2005

    Which pole is up?

    That link wanted to reverse me!. Marrtin
Top