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  1. S

    How to make a current source with two transistors?

    current source hi I want to make simple current source with two transistor do power transistors do it without problem I dont need precision
  2. S

    Need circuit for making camera flash with 220V AC power

    camera flash I want to make camera flash with 220 volt ac power instead of ocsillator and I need a circuit if any body help me. and I want to control flash lamp with transistor so is it necessary to open the connect of ac power from flash capacitor. and so good if you know the current of flash...
  3. S

    Circuit for photography flash

    Re: flash hello dear can you say me what is the reason of generating pulse(25 khz connected to coil) in flash circuit (you ave send me) and what is the specificetions of first coil from left in the picture. thank you
  4. S

    Circuit for photography flash

    Hi I want a circuit for phtography flash can any one help me?
  5. S

    Help me buy a metal detector

    hello I wanna buy metal detector to work for about maximum 50 cm but with high precision to find at least 20 coins together .Do metal finders support this?
  6. S

    Can I install the .Net platform on Windows XP home edition?

    Re: XP home edition vs .Net oh how much answer.
  7. S

    Can I install the .Net platform on Windows XP home edition?

    XP home edition vs .Net 1.Can I install the .Net platform on Windows XP home Edition .? If no what is differences between the xp professional edition and windows xp home edition. 2.Can I install a new platform on the laptop with the default platform .?
  8. S

    How to find a chip's port signals on the internet?

    chip I want to find a work of special IC that has been packed and I only have its port but the euip has name ,how I can search in internet to find its port signals.
  9. S

    Oscillator with 2 transistors and 2 distortions !

    Re: oscillation thank you it was so good with last method I get response I wonder that when I open the c between T1 collector and T2 base and input signal to it it works so good and it has equal amplitude for all frequencies and although the feedback network does not change the amplitude or...
  10. S

    Oscillator with 2 transistors and 2 distortions !

    Re: oscillation thank you I have test the power supply I think it is beacuse of some other l or c in my ciruit this is my circuit has been attach and 2 transistor of the first used for oscillation.this is the circuit of lc meter.
  11. S

    How to measure characteristic impedance of coax cable?

    Re: cable by the way of calculate c and l and r of the line in this way we calculate aproximation of main Zc but when my cable lenght is about 1 meter and freq=900Mhz we have disturbuted c,l in all of line and we have some difference between calculations.I accept your opinion but I dont know...
  12. S

    Oscillator with 2 transistors and 2 distortions !

    oscillation I have a ocillator with 2 transistor but it has 2 distortion:once it is one other frquency on the sine wave (it is not harminic) I think my circuit has another resonance frequency but it is dammped like I mean we have a dammped sin wave in each period of main sine wave.another...
  13. S

    How to measure characteristic impedance of coax cable?

    Re: cable thank you for your ansewr.how I must use these resistance at 900Mhz frequency that wavelenght is 0.34 meter these can generate lots of error.
  14. S

    How to measure characteristic impedance of coax cable?

    cable How I must meausure characteristic impedance of coax cable? I have coax cable.I want to use it in 900MHz how I can measure it characteristic impedance. thank you
  15. S

    How to match my IC with this impedance load?

    Impedance Matching I am designing PLC(power line carrier) and I am using IC MC1496 for my project.The output signal of this IC is connected to LC load that this LC is coupler of signal to distribution line .How I must match my IC with this load? The unload signal is sine wave and the loaded...
  16. S

    Help me design class c amplifier at 5MHz

    class c hi I want to design class c amplifier .At frequency 5 Mhz what is the value of rfc ? thank you
  17. S

    How to excite coaxial cable with signal generator 50 Ohm?

    Re: cable My frequency is about 10Mhz and I have wave return in this frequency and lenght of my cable is about 6 meter.
  18. S

    How to excite coaxial cable with signal generator 50 Ohm?

    Re: cable I want to connect signal generator to coaxial cable.This signal generator has output impedance 50 ohm and it is not matc with coaxial(75 ohm).I want a ciruit to match them.
  19. S

    How to excite coaxial cable with signal generator 50 Ohm?

    cable hi I want to excite coaxial cable with signal genarator 50 ohm.How I must match it. thank you
  20. S

    Questions about class c amplifiers

    class c thank you its good pdf I found that transistor conduct a percent of cycle and voltage will recover by tunk circuit .Is it right?

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