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  1. ante1

    Boosting Regulator Current/ATX power supply

    Kevin, I don
  2. ante1

    Boosting Regulator Current/ATX power supply

    Kevin, The output side of the regulator is monitoring the output voltage and feedback to control the transistor is produced in the BE resistor. Ante ::)
  3. ante1

    Many supply voltages

    Kevin, If using very low currents it is possible to use zeners and resistor dividers, but otherwise it is a very "lossy" way to go. You must have some idea of the current needed nA, mA, hundreds of mA or A. And of curse the voltages involved. An interesting thing is if you can use common ground...
  4. ante1

    Boosting Regulator Current/ATX power supply

    Kevin, The transistor is not backwards! Here you can see how the boosting regulator is calculated: Ante ::)
  5. ante1

    Pulse Width Modulation

    To All, To minimize the temperature in the power stage it is important to have fast rise and fall times =(nice looking square wave). There are two ways to go with the choice of frequency. One is to calculate the optimal frequency for the motor used, second to use a high frequency like 15
  6. ante1

    Many supply voltages

    Kevin, A low value resistor tap or a Zener circuit could hardly be an optimal way to go. What voltages and currents do you need and in what kind of environment is the circuit suppose to
  7. ante1

    source for strain gauges

    Darrin, Have you checked here: http://www.intertechnology.com/Vishay/pdfs/Catalog_500A.pdf Ante ::)
  8. ante1

    Boosting Regulator Current/ATX power supply

    Sasi, I am sorry but I can
  9. ante1

    3 Pin Pc Fans.

    AJB2K3, Thanks for letting us know! Ante ::)
  10. ante1

    Boosting Regulator Current/ATX power supply

    Coder, Is it possible that you have swapped the PNP transistor for a NPN? Ante ::)
  11. ante1

    Device to scare mosquitoes..

    Rhonn, Can this be what you are looking for? http://www.kemo-electronic.de/en/bausaetze/b005/index.htm Ante ::)
  12. ante1

    Led display Digital Voltmeter question

    Sorry, I believed it was a mistake curse I don
  13. ante1

    Led display Digital Voltmeter question

    audioguru, Greg asked
  14. ante1

    Champs!

    ;D Greece Are European Champs! ;D Congratulations Greece a well deserved victory! I will not comment on the Swedish team. :-X Ante ::)
  15. ante1

    Led display Digital Voltmeter question

    Greg, Welcome to this community. I assume you are using an analogue meter since you want a 0
  16. ante1

    Dual Lab Power Supply

    audioguru, Take a look at the power transistor data sheet. The SOA tells me they will cope as they work in pairs it is possible to get 0.1 V @ 5A with a good heatsink. Am I right? Ante ::)
  17. ante1

    Dual Lab Power Supply

    Hi All, I found an article about a Lab power supply. It
  18. ante1

    Our "DC Motors" article

    audioguru, The first point, only under certain condition it can be true. If the current draw is high and there is a voltage drop the motor looses some of it
  19. ante1

    electronics

    suresht, These links will give you a start. http://www.arcelect.com/lightnin.htm http://www.taunton.com/finehomebuilding/pdf/Lightning.pdf http://www.hq.usace.army.mil/ISD/YellowPages/info/lasps.html Ante ::)
  20. ante1

    How to increase reactance in a coil of few turns?

    Thrival, I am having a hard time interpreting the schematic. Is this the original schematic? I can
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