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  1. Martaine2005

    12vdc Pulse Timer

    OK, to revive this thread. Even though the OP has not replied. I found a solution and it works. @hevans1944 I used the side lights power to supply the relay. pin 87. So only powered when lights are on. Supply from flasher relay to diode and capacitor (largest I had 6800uf). Pin 85. And pin 86...
  2. Martaine2005

    USB 5V power from 12V car supply

    Hi John2k, Your assumptions are correct.. The Max is 3a. Your tablet will only draw the current it needs. You could use a 5v 5a and the same applies. A device will only draw what is required. Martin
  3. Martaine2005

    Buy LCD

    You can buy any screen...Glass or plastic / perspex. Even a kitchen tile. It is the flourescent pens that illuminate with light. Martin
  4. Martaine2005

    Please help with replacing electromagnetic buzzer

    Hi, I am probably going to get shot down here but...... Can your friend hear the cars horn/hooter ? I don't mean at close range like he presses the button and hears his... I have a friend who is totally deaf. I remember drawing a picture of a plane hitting the towers for him.. I once followed...
  5. Martaine2005

    Windows 98 Computer Modification, please help!!

    Hi jackfen, as davenn said, the pictures are really bad. The 1st picture seems to be a 14 pin. The standard vga was/is a 15 pin. 3 rows of 5 pins. Can you provide a better picture of the interface card with the pins? If the card is correct for pc to mac pin-outs it is more than likely that...
  6. Martaine2005

    Help identifying glass diode without markings (parallel to relay)

    Hi, this looks very much like a switching diode. Have a look here at the data sheet. http://elcodis.com/parts/380917/1SS133T-77.html Also seems to be very similar to your length measurement too. Martin
  7. Martaine2005

    Hiii

    There is an excellent BBS and forum here.
  8. Martaine2005

    Buy LCD

    Ebay has them here. Quite a nice idea. Martin
  9. Martaine2005

    Hiii

    I don't believe you :oops:
  10. Martaine2005

    Hiii

    Hmmm, I hope it includes the AER too.
  11. Martaine2005

    12vdc Pulse Timer

    Aww. go on Steve, (EEVblog) Don't plug it in. Take it apart....
  12. Martaine2005

    Hiii

    This will be quite easy.. ' he brought you here to ask questions ?' Buy a LIGHT BLUE paper writng pad and ask him all the questions you need to know!! Your friend is a walking, talking electronics genious. I wish I had friends like that. Ooh, I get it now. He is fed up with your questions!! Martin
  13. Martaine2005

    How does an ATX power supply work?

    @MrOmnos I think most ATX psu's use components to achieve the different voltages rather than dedicated regulators. The KA7500B (switched mode power supply controller) is in fact a 5 volt regulator (or 5 volt reference) Or 5 volt standby for the motherboard. This 5 volts is converted to 3.3 volts...
  14. Martaine2005

    How to control 80 relays using ardrino

    Let me show you the simple way..http://www.rapidtables.com/convert/electric/Amp_to_Watt.htm Martin
  15. Martaine2005

    How to control 80 relays using ardrino

    I am getting really confused here... You said about a battery backup for power outages. If you are using the battery backup to keep the transformer online, then the transformers wattage is what you use..Surely?
  16. Martaine2005

    How to control 80 relays using ardrino

    I think you are asking an impossible question to answer. You need to supply the wattage combined of all the appliances you want to automate? But if that is the transformer you are going to use then the amswer is still 1500 watts. Martin
  17. Martaine2005

    LED Strip Lighting Help

    https://www.electronicspoint.com/threads/got-a-question-about-driving-leds.256849/ Have a thorough read of this LED resource section. It will explain all you need to know and more. Martin
  18. Martaine2005

    How to control 80 relays using ardrino

    Watts = Amps * volts 1500 watts. Martin
  19. Martaine2005

    Old Tube amp

    Hi Chris, measuring capacitance wont tell you if the capacitor is bad. An ESR (equivalent series resistance) meter is the only method to know for sure if the cap is bad or not. Other than bulged, leaking electrolytics of course. On an old unit it is probably good practice to replace all...
  20. Martaine2005

    How to control 80 relays using ardrino

    My system has voice recognition sometimes...... When I shout out "turn the bathroom lights off" I hear a patter of little feet and the lights go off!! Martin
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