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  1. ante1

    help about this supply

    MP, Obviously this is me not interpreting this correctly: “The use of a center tapped transformer and two diodes provides less ripple.”    Less ripple than what? And : “A needed feature when you regulate the supply in this manner.” Which manner is this PSU regulated in? Further more I do not...
  2. ante1

    pc Speed Test

    Hi Audioguru, Are you sure yours is almost 3GHz? How much RAM do you have? Calculations like this hug a lot of RAM.
  3. ante1

    help about this supply

    Hi MP, Do you think that two diodes on a center tap will provide less ripple than four on a conventional transformer?? I don’t think so. Steve asked : "Why is it that a centre tapped transformer is used instead of a normal transformer?
  4. ante1

    Switching polarity of motor

    Hi Guys, Don’t you just hate when somebody drops a question like that and then disappears? :(
  5. ante1

    guitar tuner

    Hi ruden, So, you are out of tune? ;D  I found this in an old magazine, I hope you like it. Tuner.rar
  6. ante1

    pc Speed Test

    Hi Audioguru, I ran it through my laptop (2GHz) but I did not try the 16 and 32M, here are the results: BTW I didn’t shut down anything!
  7. ante1

    Darlington Phototransistor - can i fudge one from an NPN phototransistor ??

    Hi Mulder, I don’t know where I got that number, it should be: 327542, sorry! :-[ It's cheaper too! ;D
  8. ante1

    help about this supply

    Hi Steve, Welcome to our forum. For this PSU you don’t need a tapped transformer you can use a standard one. A non linear PSU is a switch mode power supply. There are many characteristics which are different between them. Try Google “linear vs switch” and you get some interesting hits. ;D
  9. ante1

    Darlington Phototransistor - can i fudge one from an NPN phototransistor ??

    Hi Mulder, You could try Farnell http://nz.farnell.com/jsp/home/homepage.jsp  nr. 1021141, it should work.
  10. ante1

    Help: Purchasing a Digital Multimeter and Soldering Iron

    Hi Guys, You could call this “compact living” on your workbench, looks very nice! ;D
  11. ante1

    Infrared Transmission

    Hi Audioguru, Yes it’s true, quite a few projects use obsolete parts or hard to get parts but often they can be substituted with modern parts. I think most circuits work even though many can be greatly improved by an ace like you. ;D  The once which don’t work at all must be made by mistakes or...
  12. ante1

    Infrared Transmission

    Hi Audioguru that was post number 5000  :o  so good luck with the next 5000!  ;D
  13. ante1

    Transient Voltage Suppression Diodes

    Hi ST, Welcome to our forum. I found a good explanation here: http://www.elfa.se/elfa-bin/setpage.pl?http://www.elfa.se/elfa-bin/dyndok.pl?lang=en&dok=2009896.htm Here is the specific diode: http://www.elfa.se/elfa-bin/setpage.pl?http://www.elfa.se/elfa-bin/dyndok.pl?lang=en&dok=3948.htm
  14. ante1

    a regular transformer

    Hi indulis, I agree, that’s the way I see it too. ;)
  15. ante1

    Flyback driver experiments

    Hi Steven, Happy New Year to you! ;D I found this page some time ago, FOUR FEET sparks! I seems easier to build the than a Tessla coil don’t you think? http://homepage.ntlworld.com/electricstuff/marxthree.html
  16. ante1

    What should I look for in a breadboard to buy one?

    Hi Genecks, Just a small caution, if you are planning to go into high frequency RF circuits a breadboard is not what you need.
  17. ante1

    How to make an audio console's power supply better?

    Hi Nid, A Happy New Year to you too! ;D The higher capacitance will lower the ripple (if any ripple exists), that’s the benefit. Yes, as indulis says: inrush current can get you in trouble (maybe) depends on the rest of the circuit and how much higher value caps you use. However it is not the...
  18. ante1

    12 Key Matrix Encoded Keypad Question

    Yes, there are chips made for this job!
  19. ante1

    500W_inveter

    Hi Guys, I am sorry but that’s it, I don’t have any further data on this one. I posted it as a display of this type of inverter in principal not as a complete project. Maybe someone else can come up with more info on this circuit.   Have a Great New Year Guys!
  20. ante1

    a regular transformer

    Well anything stored between the primary and the secondary has to be a loss. What I mean is you would like to get out of the transformer as close the same amount of energy as you put into it, don’t you. ;)
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