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  1. Martaine2005

    Laptop Electronics Engineer or Technician needed (Laptop isn't Turning on)

    Was it plugged in to the charger during this time or left sitting switched off? How do you know the battery is fully charged? Do you have more than one? I have two older laptops that do this, and both have problematic batteries. If I leave them for half hour charging, they will eventually turn...
  2. Martaine2005

    Are these buzzers just like the ones found in a smoke detector?

    I am not sure about that type, but if you want something loud, the sound bombs work very well. Have a look here. They are cheaper too. Martin
  3. Martaine2005

    Simple Circuit Problem

    Ok, in that case you need two input sources and one output on a SPDT switch. State1 constant supply and state2 computer controlled. Then you can use just two switches for on/off of each circuit regardless of which supply. Martin
  4. Martaine2005

    Simple Circuit Problem

    I omitted to say sw1 and sw2 too. So wouldn't have worked anyway.:oops: Back to the diodes then...For now... Martin
  5. Martaine2005

    Simple Circuit Problem

    Can I ask a question? Why do you need STATE 1 And 2? You caould change the top toggle for a normal ON/OFF for both circuits. And change sw3 and sw4 for 2way switches. Link sw1 to sw3 and sw2 to sw4. That should be something like a two way switching circuit and all switches work independently...
  6. Martaine2005

    Phase shift

    Uh Hah You forgot to like!!!! And please subscribe too
  7. Martaine2005

    Phase shift

    Lol, and post a £20 note too.
  8. Martaine2005

    Phase shift

    You have to CLICK on LIKE.... He will then post it for you..
  9. Martaine2005

    I want help for my seminar

    http://www.techradar.com/news/phone-and-communications/what-is-nfc-and-why-is-it-in-your-phone-948410 https://en.wikipedia.org/wiki/Near_field_communication http://www.nearfieldcommunication.org/ Only if you like things very close to you.
  10. Martaine2005

    Philips bike-light, blown up element with two connectors: BDP 06A

    Did I just get sucked in to click a link to get HITS on the site?
  11. Martaine2005

    Help on how to test this device

    Hi Mike, It looks like the transformer has snapped! Or is it just the tape around it? Secondly, desolder the black DC wires, they look like they are shorting each other. Thirdly, the two caps by the DC output should give a clue to the output voltage. They will be higher voltage rated than the...
  12. Martaine2005

    Wanted: Need power source/battery charger pc40

    Todd Engineering went out of business, and others in your situation have been told to replace with an equivalent from another company. Is yours missing or broken? If broken, I found a hand drawn schematic for the PC30, but it's supposed to be the same. You could possibly have it repaired. The...
  13. Martaine2005

    Gould 4100 info please

    Hmm, sounds like you have already identified your regulator. Approx 19v, 100ma and TO92 package. the xx78Lxx series seem to fit the bill. Or was that just an example? Martin
  14. Martaine2005

    Non working TV

    Hi Bob, sounds suspiciously like the power supply has failed. Probably just a capacitor or two. Can you open it up and post a picture of the board? Martin
  15. Martaine2005

    Whether to purchase...

    Hi Alissa, I admit I have no idea what polymeric is! But it seems that 3 in 1 fans are readily available. Some of these are nice, but probably 'polymeric':) As for 220v or 110v, that would depend on what you buy. Also have a read of this Martin
  16. Martaine2005

    Giant newbie, needs help regarding transmitter

    Hey Hop, I think you may have upset the OP.:) Transmit 'Heroic spin' and numbers, or other words. To a receiver and then a screen only 2 or 3m away? Is the screen ceiling mounted above a double divan by any chance? Martin
  17. Martaine2005

    AC Compressor blowing fuse

    You have 2? That's where I am going wrong, There is nothing left, right, above, below or inbetween. I read about reverse voltage. 1000v or 700v RMS and thought that was the voltage the diode would protect against. Oh well, back to the black board Miss. Martin
  18. Martaine2005

    AC Compressor blowing fuse

    Hi John, to be honest, I have no idea. I was just reading about a similar story and found the result |I posted. I thought it might have been useful, but obviously not. My keen interest to help does sometimes obscure the obvious!! Martin
  19. Martaine2005

    Gould 4100 info please

    Well I am sorry I cannot help.. BUT, I may know a man who can:) @(*steve*) probably has a few in his shed. Martin
  20. Martaine2005

    AC Compressor blowing fuse

    This is what I was reading.. The process of choosing the proper flyback diode for the suppression circuit is quite simple. First, determine the current the clutch or brake demands. For example, the Warner ERS-42 electrically released brake needs 0.239 A at 90 V to release its total maximum...
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