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  1. S

    100 uH coil

    Hey Audioguru, did you get my message? //Staigen
  2. S

    50 ohm antenna

    Maybee i'm wrong, but isn't this for a 1/4 di-pole? Correct me if i'm wrong! //Staigen
  3. S

    100 uH coil

    To Audioguru Yes, i have seen it before, here on the board, a nice little thing, built on a wero and all! Nice! ;D ;D BTW, have you notice my message(question)? To Alun I agree with you, suddenly not 100uH! //Staigen
  4. S

    100 uH coil

    Eh, 100 uH? //Staigen
  5. S

    Dots in transformer symbols

    Hi Walid This dots means the start of the winding. The windings is suposed to be wound at the same direction Often you can't, you have to measure it! Else it is in the description of the tranny! //Staigen
  6. S

    positive and negative voltages

    Oh, you wanted a +12V to -12V converter! As Alun show you here, this is a simple one, but lack exactly center of the ground, and is not nessarily in many cases. But i would connect the positive terminal of the 100uF cap at ground instead of connecting it to the positive terminal. And use...
  7. S

    DC MOTOR CONTROLLER

    It's okay Alun, i also make mistakes, often much bigger than this, sorry if you felt jumped on, not my intensions //Staigen
  8. S

    About this Cirucit

    Hi Yepp, but you also removed the current feed to the ic and it's ground! ??? The red circles you put on the schematic is for highlighting some of the components, i belive If you omit the current limiter, wich i belive you should not, you can also remove the 1N914 diode, but you have to do...
  9. S

    How can this circuit improve 0...30V???

    Hi again Well, wich IC was used in the improved 0 to 30V PSU here on this site? I belive it can handle inputs down to its negative rail, but i am not sure about its output, hey, audioguru, this i belive you know? Because the OP-Amp used in the original schematic not can handle inputs down to its...
  10. S

    DC MOTOR CONTROLLER

    I belive we came a little bit offtopic, hehe, back into the line again! ;D ;D //Staigen
  11. S

    DC MOTOR CONTROLLER

    Come on Alun, use your common sense, the project is not a PWM controller, its only a variable cmos oscillator, driving a power mosfet, thats driving a DC motor! It have errors, stating it is a PWM controller, amongst others. And the parts list states IRF511 or IRF620 and the notes says that the...
  12. S

    How can this circuit improve 0...30V???

    Oops, replying at the same time ;D. Hehe ;D Also, if changing the IC, it must be a high voltage, tolerating moore than the voltage at pin 8! //Staigen
  13. S

    How can this circuit improve 0...30V???

    Hi there, both of you Wrong, if i do my math right, maybee i'm wrong, correct me if it is so! According to my math, the divider should be 2k to 1k, or, better up, 4k to 2k! Then you have 0 to 30 Volt out. Also, the resistor in the input rail should have a resistance about 1.3 Kohm. There are...
  14. S

    positive and negative voltages

    Hi there It depends on how much current you have in the "ground" terminal, and how much it can be tolerated to differ from exact center voltage. How much output do you have from the PSU? Voltage? //Staigen
  15. S

    DC MOTOR CONTROLLER

    Hi No, i havent seen this before, got me a good laughter :) :D ;D Yepp, across R2! Only 6 Volt for the gate? I havent read the data for the mosfet, but isn't that a little low? And the gate connected to a Cmos, dont they have drive capability on the low side a bit? And no stopper? :( :D //Staigen
  16. S

    DC MOTOR CONTROLLER

    Hi there Jherms, velcome to this board There are many ways to do this! We need moore input! Constant RPM? Constant torque? Proportional? One direction or both? Voltage? Current? Stall current? What is it supposed to do? Moore? //Staigen
  17. S

    about reading schematics particularly infrared switch (PLEASE HELP...)

    Hi there joneLL Its the international(european?) way of typing values. ISO, i belive
  18. S

    capacitor?????

    Hi there alkv23 Well, what is it moore to say? The cap is a 20 uF capacitor, probably a El-lyt, but not necessarily so. Any sign of positive or negative connections? Red and/or black connection markings? Red and black conecting wires? Without a pic it's almost impossible to tell moore! :( I...
  19. S

    IF transformers

    Why didn't he write that then? //Staigen
  20. S

    Sequential Timers with PWM Motor Speed Control

    No problems here, it must be internet or your ISP or at your computer! ;D ;D //Staigen
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