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  1. Shahriar

    Does the Magnet with a Staurated Core get stronger if we Increase Current?

    Thank you, U explained it  :)  :) Shahriar
  2. Shahriar

    Does the Magnet with a Staurated Core get stronger if we Increase Current?

    Dear Ante Would you mind explaining a little more.... ThanX Shahriar
  3. Shahriar

    Timer

    You can Also build it with just a Microcontroller very simple and with lots of abilities. Of course building such circuits with TTL Ics is much more enjoyable. HTH - Shahriar
  4. Shahriar

    Does the Magnet with a Staurated Core get stronger if we Increase Current?

    Thank you Audioguru. ;) Do you know how can I determine the Saturation Current for My electromagnet with i.e. 200 turn 26 gauge wire. I do not have exact information about my core. it is just a piece of Iron. ThanX Shahriar
  5. Shahriar

    Does the Magnet with a Staurated Core get stronger if we Increase Current?

    Hi I want to know If I have an Electromagnet connected to a DC Voltage with a saturated Core, Can I pick up More heavy masses If I increase Current? or because the Core is saturated no difference will be? If I can, Then what is the difference between a Non-Saturated Core with a saturated core...
  6. Shahriar

    How UPS recognize a voltage fault in Line!

    Hi Does anybody know the standard solution for detecting a fault in Lines to turn on a UPS before PCs reset. ThanX Shahriar
  7. Shahriar

    How to use the ratiometric Hall effect sensor(UGN3503) in a levitron

    Dear Ante Would you mind just telling me the sensor output voltage in two condition (PWM=1 & PWM=0) if we assume the Distance between The sensor and Electromagnet is constant (just approximate numbers). i.e If the distance is 2Cm the Vout = ??? when PWM =1 Vout = ??? When PWM =0 Dear...
  8. Shahriar

    How to use the ratiometric Hall effect sensor(UGN3503) in a levitron

    Yeah, maybe buiding one is more cheaper. But I am just curioud about how this man have done this. The only part that I can't understand is: when the Electromagnet switches, will affect the Hall sensor. and everything goes wrong... can you explain. Here the file, I think you have seen it before...
  9. Shahriar

    How to use the ratiometric Hall effect sensor(UGN3503) in a levitron

    Hi I want to build a levitron by using a PWM IC (UC3843). I explain the PWM Controller behavior as below very simple to explain my problem. PWM=1 if VFB < 2.5V (Controller Vref) PWM=0 if VFB > 2.5V In most of Levitrons on the web, The sensor is placed near the ElectroMagnet. the...
  10. Shahriar

    How to add a mute system to an OpAmp

    Dear Audioguru Thank you very much... But do you have any oponion about The Transistor in the noninverting Pin. Have I explained it clear? ThanX Shahriar
  11. Shahriar

    Noise Measuring Unit Meaning!

    Hi I was reading an article about a Regulator and it was witten as below: "" Figure 1 combines low noise components and extra filtering to achieve an output noise floor of only 6 nV/Sqr(Hz).  " Can Anybody tell me what does "nV/Sqr(Hz)" Mean! Of course the electronic Meaning, I know the...
  12. Shahriar

    How to add a mute system to an OpAmp

    Here the CCT  ;D Shahriar msmicsch.zip
  13. Shahriar

    How to add a mute system to an OpAmp

    Dear windoze killa Thank you very much, Strange Abbreviation  :) Dear Audioguru I Had the same oponion to mute the signal in the same manner as you said, Of course with a BJT. I thought if the signal has a DC (i.e. 3V) then it works but when there is no DC I didn't have any oponion for...
  14. Shahriar

    How to add a mute system to an OpAmp

    Dear windoze killa Can you write the full Dictation of CCT? I don't know what does it mean. Dear Audioguru Fading with a ramp was very  tricky. But I didn't understood where you put that Resistor anf FET?  ::)  ::) to mute the system ThanX Shahriar
  15. Shahriar

    How to add a mute system to an OpAmp

    Hi These two schematics are similar to the Ones I mean. One is a Single Supply Amp and the other is a double supply. ThanX in advance Shahriar Mute.zip
  16. Shahriar

    Download Elektor Journal Here...

    Hi One of my friends has uploaded this Journal in the link Below. I Put it here. Maybe others like it. http://www.4shared.com/file/1212367/9d46f8df/elektor_january_2006.html PASSWORD = vampire ُShahriar
  17. Shahriar

    How to add a mute system to an OpAmp

    Hi I have an OpAMp (NE5532) which is driving a Headphone. I want to add a Mute System to this circuit. How is it possible whether it has a Dual Supply or single Supply. (If it differs) ThanX in advance Sahriar
  18. Shahriar

    Data Transferrinf Over a 25 Meter Wire.

    Thank you very much for your reply. Master Should send Data to all slaves and Retrieve some data from each Slave. Just like a I2C Bus System. But the difference with this system and a Small I2C Bus System is Distance between Master and Slaves. BTW, Each Slave is a MCU Based Circuit. ThanX...
  19. Shahriar

    Data Transferrinf Over a 25 Meter Wire.

    Hi I am designing a new Language laboratory System. I want to send serial data via a Common bus to all Stations (Students devices). The length of this bus is around 20-25 meters. Which method is the best for transferring Data. I mean FSK, RJ485 (if I wrote it right), SPI (that I don't think it...
  20. Shahriar

    Why Sink current is higher than Source current?

    Hi Can anybody tell that why Sink Current in most of Integrated circuits are higher than Source current. i.e. a TTL Gate can sink around 20mA while it can not source more than 10mA. (The Numbers I said are not very sharp.) ThanX Shahriar
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