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  1. Martaine2005

    Modding a lamp

    That really depends on the current limiting resistor you’ve used?. If you show a quick drawing of your connections, I will try and help you. Please include the power supply/battery voltage and resistor value. Martin
  2. Martaine2005

    Modding a lamp

    LEDs are polarised, meaning they only conduct when wired correctly. People confuse LEDs with having a positive and negative leg, when they actually have an anode and cathode. As you can’t get to them on your project, a small CR2032 battery can be used to verify if the LED works and also check...
  3. Martaine2005

    Modding a lamp

    I’m not sure what you think is so complicated?. It’s simply a switch and LEDs!. Martin
  4. Martaine2005

    How to test if I am grounded properly to work with electronics?

    Is your sink metal?. Anyway, a metal sink and copper pipes are grounded (earth ground) called ‘bonded’. not battery negative. Do yourself a favour and us, read about earth ground, chassis ground and neutral.
  5. Martaine2005

    home made fabrication for resistor,capacitor,diode (RCD) circuits

    Is @ratstar your neighbour? Brother? Cousin? Or YOU?. You both seem to be working on the same ingenious designs. Martin
  6. Martaine2005

    capacitor amplifier. (its got diodes)

    Please, please, please try this in the real world with real capacitors. You may find something interesting happens.
  7. Martaine2005

    how to short through caps

    Pure genius! Ratstar would be proud of you!.
  8. Martaine2005

    Audio mixer burning smell fix

    The ‘good’ components next to it are Schottky diodes. The foot print is similar, so could also be a schottky too. Martin
  9. Martaine2005

    whats the difference between 1 terminal power and 2 terminal power in falstad?

    Que?
  10. Martaine2005

    whats the difference between 1 terminal power and 2 terminal power in falstad?

    You don’t need two batteries. One battery has a voltage between the two terminals. It is positive and negative. Negative being the 0V.
  11. Martaine2005

    whats the difference between 1 terminal power and 2 terminal power in falstad?

    “It seems to behave differently”. Yep, 1 terminal connection doesn’t work and TWO connections does work!. Forget the simulator and try it!. Martin
  12. Martaine2005

    whats the difference between 1 terminal power and 2 terminal power in falstad?

    +5V and -5V will have a Peak to peak of 10V. +5V and 0V will give you 5V. The GND symbol (use your imagination) is the GND or Negative connection to the battery or power supply. It keeps the schematic tidy. It’s an invisible connection!. BUT (use your imagination) IS connected. Martin
  13. Martaine2005

    whats the difference between 1 terminal power and 2 terminal power in falstad?

    One has one terminal power and the other has two:)
  14. Martaine2005

    House vs apartment

    Totally agree with above statement. An apartment is not ‘freehold’, normally only ‘leasehold’. ‘Common hold’ is similar to lease but without a time limit. So, you own the property but not the land it’s on. Where as freehold, you own the land too. Maintenance depends on age and quality of the...
  15. Martaine2005

    House vs apartment

    You joined an electronics forum to ask about housing?. If you can afford a mortgage, buy a property (house or apartment). If you can’t afford a mortgage, rent a house or apartment and pay the ‘owners’ mortgage!. Martin
  16. Martaine2005

    Flimsy

    They don’t make’em like they used to!. I feel your pain. Martin
  17. Martaine2005

    APEX JR. subwoofer amp blowing fuses, bad caps found

    Yes, sounds like the transformer is shorted. . I presume you checked the bridge rectifier?: Edit: check the bridge first. Martin
  18. Martaine2005

    Kenwood x45 no power

    If you check the resistor with your multimeter, it should read within 5% or so of that. The heat generated is quite normal and boards do discolour over time. Problem is when manufacturers use a 1Watt resistor where really it should be a 2 Watt for cost cutting. The board needs re-soldering...
  19. Martaine2005

    Kenwood x45 no power

    That is a 27 Ohm 5% resistor. If it’s loose, you obviously need to solder it again. And while your iron is hot, check the other solder joints too. Martin
  20. Martaine2005

    oscillator working in falstad for real this time

    I have no idea, again!! Martin
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