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  1. Martaine2005

    How to Charge an 8 AA NiMH Battery Holder?

    Hi Jake, I couldn't actually open the linked pictures. The double connector is probably because your battery is in the middle. So charger/adapter to battery and unit being powered. Something like this?
  2. Martaine2005

    Before I start testing....

    Yes, they are called Axial caps. But I doubt they are causing your problem. They would block or fade the high frequency to the tweeter. (If it is a band pass filter). More than likely the board where the DC adaptor connects to the unit. Martin
  3. Martaine2005

    How to Charge an 8 AA NiMH Battery Holder?

    Hi jakfish, I presume the batteries are in series 9.6V? Any radio controlled transmitter charger will work. Providing it is 9.6V. Then cut off the end if the polarity is reversed. From memory Futaba were the odd ones out. But just solder the required size jack with correct polarity. Martin
  4. Martaine2005

    Smallest solar power source

    What about a quick shop at poundland! Better still, the 99p shop:). They usually have tiny solar lights running off 2AA batteries (3V). Might be worth looking into? EDIT: Sorry, didn't read properly. Ignore my post.. Martin
  5. Martaine2005

    Before I start testing....

    Hi Wimmer, That board on the left with a "toroidal" looks like a high pass filter. It definitely sounds like a capacitor...The internal power supply is probably to blame. The only real way to know for sure is with an ESR meter. However, if you have a few similar caps to the boards caps, you can...
  6. Martaine2005

    Homemade diode

    Hi pidja, The easiest way is to scavenge thrown out (broken) electronic items. What do you call high voltage? May be some car (auto) spares would better suit your needs.. Martin
  7. Martaine2005

    Zener Diode

    If it's homework, it's about 6 weeks late:). He either copied and pasted someone else's work, or they write exactly the same!! Martin
  8. Martaine2005

    Diodes

    I suppose the diode drop of .3 to .7 volts plus the breakdown voltage of the reverse biased diode. This all depends on the diodes used. Martin
  9. Martaine2005

    Recording the entire signal of an RJ11 line

    Recording incoming calls, nuisance calls for evidence can be legal in certain circumstances. Recording your own outgoing calls is legal if the third party are aware they are being recorded. However, to automatically record incoming and outgoing calls without permission is an offence as Dave...
  10. Martaine2005

    Sonos ZP-100 Custom Robinette Box for Headphones

    Why don't you buy decent wireless headphones and use the analog audio out of the ZP100? The speakers can be turned down with the volume and the headphones have their own amp and volume. Example. Martin
  11. Martaine2005

    latching pushbutton help

    I like the sketch too John.. Long live Old Skool.. Martin
  12. Martaine2005

    where do you get your "stuff?"

    I do buy bulk as Bob says. But I also never let my family throw any electronics away without scavenging first!! I have to add that a love of soldering or desoldering comes to mind..Personally, I love it!! Martin
  13. Martaine2005

    reducing 5V to 4v or 4.2v MAX

    Never a good idea to answer when hungry!:eek: Martin
  14. Martaine2005

    configuring grid tie inverters to function when mains power off

    Hello, This guy, also called Martin has some real in-depth videos on his channel that explains everything needed for on grid and off grid. He shows how to install, maintain, replace batteries and the whole workings of solar panels etc. This video is just one from his channel that is very...
  15. Martaine2005

    Energy Lost Due To Friction

    Sounds like bicycle brakes Trevor!! Negligible / non existent when wet..:p Martin
  16. Martaine2005

    How to turn off a LED with 3.7v

    Thank you uncle Chris, However, neither of us know what the load is! If the resistor will limit current / voltage to the load? Your nephew, with love:) Marty
  17. Martaine2005

    newbie question

    Nice find Adam, I knew you could figure it out!! Andy, that means a power supply of three volts ish. Much easier to find. Martin
  18. Martaine2005

    LED power supply help

    Hi Ian, I suppose the first thing that springs to mind is the negative connections. Have you got the kathode of the LEDs to the collector and base to negative rail? Some people join the kathode and base to negative! This will obviously keep lights on. Without being rude! did you follow the...
  19. Martaine2005

    spearte circuits

    maor, Did you come up for air? I cannot read that!!
  20. Martaine2005

    Convert a Holiday Brilliant Spectacular Light & Sounds

    Hi, First, how does this system work? Does it have separate lights that all plug into one controller? Does the controller have channels now? If the controller only has one channel then it can't really be done. You can however buy multi-channel controllers for this purpose. There is a chap on...
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