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  1. ante1

    12vdc->9vdc

    Hi scott, A safe, easy and low budget way is 5 cheap standard diodes in series with the positive wire. This will reduce the voltage by about 3 Volts and you are home free! 8)
  2. ante1

    12vdc->9vdc

    Hi scott, Wellcome to this forum! We have just discussed something similar in this thread: http://www.electronics-lab.com/forum/index.php?topic=3354.0 Maybe you can find some help in this, or we can try something else if you like.
  3. ante1

    Convert 12 VDC batteries to 8.4VDC

    Hi Alun, That’s a good point. Another thing about switchers is that they just need a few external parts and the complete circuit is very small in size and weight. A good example is a PSU I recently purchased, 13.8V at 20A which is one third the size of the one it replaced. The old one was a...
  4. ante1

    Convert 12 VDC batteries to 8.4VDC

    Hi tnk2k, They are alternatives if you don’t have the energy to do it yourself! ;D
  5. ante1

    What will it do if I...?

    OK, not a god and simple “hack” then!  ::)
  6. ante1

    Tavern-meeting in Thessaloniki [4-6-2005]

    Hi guys! The rest of us who cannot attend this “VIP” meeting expect some pictures from the event to be posted here! I am sure you understand! ;D ;D I wish we could all be there!
  7. ante1

    arc welder schematic

    Hi Edua, The light-weight welders are as you pointed out earlier much more complicated. They are also sensitive in construction, easy to get something wrong in layout and control. The common light-weight “stick” welders are quite expensive compared to transformer type here too. The prize ratio...
  8. ante1

    Convert 12 VDC batteries to 8.4VDC

    Hi Audioguru, I think you may be exaggerating the ripple and noise problems with switchers. I don’t see the problem with filtering, it has worked fine since early VCRs. Anything you buy today in VCRs DVDs and any kind of video cameras all have one thing common, they all get their power from...
  9. ante1

    Forum rules?

    Thanks MP, I knew I have seen it when registering but I wasn’t 100% sure of its content. I guess is pretty much a standard form. Is there a way to read this without registering, if you need to check some detail?
  10. ante1

    looking 4 etap power station

    Hi nalen, Never heard of it, can you explain what it is used for?
  11. ante1

    Convert 12 VDC batteries to 8.4VDC

    Have a look here: http://pdfserv.maxim-ic.com/en/ds/MAX724-MAX726.pdf Why convert almost half the energy from the 7.5Ah battery to heat? On page one is a suitable circuit (Typical Operating Circuit), just set the voltage divider to the desired output voltage. Can you do this simpler or with...
  12. ante1

    Forum rules?

    Hi Alun, I have a vague picture of something I saw (and accepted) when registered on this site! But I might be wrong; it could be on another place I have signed in to!  8)
  13. ante1

    What will it do if I...?

    Hi Bikerman, OK, so no real time clock in a VIC then? With the PC there where no timing problems except with some old DOS programs.  
  14. ante1

    2N3055 Vce(sat)

    Hi Alun, The ”digital” CW was just a joke, the Morse-key is either closed or not ( 1 or 0 ).  ;D
  15. ante1

    2N3055 Vce(sat)

    Hi Alun, Yes the RF is sinusoidal and not square wave as far as I know. Maybe you could say that CW is digital though!  ;D ;D Most SMPS runs in the 40 to 200 kHz range.
  16. ante1

    What will it do if I...?

    Hi Bikerman, I don’t have the schematics but I guess it would be possible to increase the heart rate a bit!  8) I once changed the 16 MHz X-tal to a 33 MHz on a 386 PC. ;D
  17. ante1

    MULTIMETER

    Hi prateek, Maybe someone have a manual to scan or copy for you, just let us know the make and model! Even a picture would help! 8)
  18. ante1

    2N3055 Vce(sat)

    Hi Ed, I agree, once you have solved the drive circuit part for Mosfets they are way ahead. They are much cheaper compared to bipolars now than 15 years ago and there are some very good readymade IC:s for driving them too. Hej Bjorn, There have been a few discussions here about bipolar...
  19. ante1

    6V Ultra-Bright Chaser

    Just put a blade on the front bumper then!  ;D
  20. ante1

    6V Ultra-Bright Chaser

    Hi Audioguru, You could put a “chaser” on you dashboard made from these alternating red-blue LED:s and it will get you through a traffic jam in no time!  8)
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