Search results

Search Forums New Posts
  1. Martaine2005

    Circuit to hold accessories on after ignition is switched off

    Hi, Mjr350 You didn't say what model vehicle it is. Or the old vehicle. 1st question that springs to mind is: Is there a model of your new car that has those options? If yes, you could probably buy a new ECU or find one from a wreckers / insurance breakers yard. And the additional components...
  2. Martaine2005

    CPU Power Supply Mod

    That is excellent work. Well done sir. "unjumped" is it a word? It is now:p I shall continue to use it.. Are you planning on another enclosure? Something fit for the best electronics benches. Martin
  3. Martaine2005

    LTSPICE how to make a resistance

    Hello, There is a great resource section on this forum for LTspice. It was created by one of the forum moderators. Have a look here. Martin
  4. Martaine2005

    Power supply circuit question - Transformerless good idea? Still pass certification?

    Heed *steve*s' advice in post#2. Buy a nice looking enclosure. Simples.. Martin
  5. Martaine2005

    Problem charging battery

    Have you tried the USB lead? You 'think' motherboard. Tell us why please. Martin
  6. Martaine2005

    Is 450 volts close enough to 550 volts for a capacitor?

    I would put in a higher voltage cap. 600v 100uf . This site in USA has 4,207 in stock. Martin
  7. Martaine2005

    Problem charging battery

    Have you tried a usb lead directly connected to the nextbook? Martin
  8. Martaine2005

    Speed control for A.C. Model Railroad locomotives

    Hi Jim, would something like this be of any interest to the club. 42 watts / 16 volts is just over 2.6 amps This tranformer has a little headroom at 3 amps. http://www.surplussales.com/item/_tp/402835-001.html Martin
  9. Martaine2005

    Fuse Rating

    Ok, the 12 volt 30 amp supply is just the maximum the supply can deliver if a device requires that amount. Remember, It's not the supply current rating that is of concern here. Only the current required by your gps device. Imagine your device is drawing 1.5 amps from your 30 amp supply, there is...
  10. Martaine2005

    Fuse Rating

    I am not really sure I understand the question sorry. Is there a fuse? Or just a wire rated at 3 amps? Also if you send 30 amps? How? The equipment will 'draw/pull' only the current it requires. Think of house wiring. The main circuit is 32 amps. But you can still use the same circuit for a 1...
  11. Martaine2005

    Fuse Rating

    Hi Abdul, The simplest answer is: If your equipment requires 3 amps, there will be no problem with the fuse. The equipment only draws the current it needs. \however, if the equipment develops a fault, the potential for it to draw a massive amount of amps is where the fuse will work (blow). So...
  12. Martaine2005

    Can anyone help identify this diode housing?!

    Well there's my problem......I didn't search for transistor socket:p Martin
  13. Martaine2005

    Simulate a variable capacitor

    You may be better off with a larger rotary switch designed to be used. Mount it in the guitat like a 2nd tone pot.
  14. Martaine2005

    Simulate a variable capacitor

    Hi Chris, those caps are just the normal range values for guitar tone pots. No, not at all. That was just a site for guitar modding enthusiasts. Very unusual to see inductors on the pots. Usually just single caps on the tone pot. As for links....All electronics stores sell them. RS, Mouser...
  15. Martaine2005

    How do get Arduino to read the angular speed of a rotating shaft?

    Hi sajibta, I don't use arduino but the 'play ground' has a complete section on rotary encoders. Have you had a read of that? http://playground.arduino.cc/Main/RotaryEncoders Martin
  16. Martaine2005

    Can anyone help identify this diode housing?!

    Hi Andy, I am replying to 'bump' this post. You have me intrigued. Maybe the more (senior) members may know.:D Can you supply us with any other info? When you say 'diode', a discrete diode or lazer diode? I typed every imaginable search term and found nothing!! What makes you think it is a tool...
  17. Martaine2005

    Simulate a variable capacitor

    Here is a site that sells custom split pots with different caps on. You may be able to do something like this. Martin
  18. Martaine2005

    Simulate a variable capacitor

    Hi John, There are such things as 'trimmer capacitors' in the nf and pf ranges. But they are more of a 'set and forget' configuration. Probably not durable enough to mount a knob for constant adjustment. I think you would be better off with the switched arrangement. A rotary switch with how ever...
  19. Martaine2005

    Short acting like a diode

    Hi Bogart123, I had a look on the net as I have never heard of it before. Very interesting looking table. If the pcb has silk screen and reference designators, I would double check the polarity of the ploarized components. It is an easy mistake to do if concentration lapses. Martin
  20. Martaine2005

    Is 450 volts close enough to 550 volts for a capacitor?

    Hi, I would go the other way. Get a higher voltage cap. 100 volts less for a cap is quite significant. Martin
Top