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  1. E

    c828 transistor

    thanks friends can you tell me is a equalizer circuit can be amplifier circuit? i have circuit that have very low output i dont know why
  2. E

    c828 transistor

    hi friend i have audio amplifier made with 2 * C828. can you tell me which transistor use instead c828? thanks
  3. E

    direct connect dvd or cd ROM to TV

    hi have you any idea for connecting dvd or cd ROM to tv without PC? SATA will be complicated but how about IDE cable ? have you any interface circuit ? thanx ;)
  4. E

    high precise Temperature sensor

    i need to fined new strong sensor.
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    high precise Temperature sensor

    Hello friends my expert friends I hope you have good day . in some months ago i made a project for sensing ambient  temperature with PIC micro controller and sensor was DS1820 and show at  2*16 character LCD. you can see scheme in this attachments. but i now looking for high precise...
  6. E

    Re: coaxial cable and GHz frequency

    hi thanks for replay i have some questoins 1.can i find 1ohm resistor in the market? 2.what about two other resistors value? 3. is output have positive voltage? 4. i want to adding PIC microcontroller after output then i need 5 voltage in output when LNB stolen. can i take it ?(5voltage in...
  7. E

    Re: coaxial cable and GHz frequency

    hi audioguru please see this attachment can you show me in this pictures? 1 question this cable have between 11- 18 voltage. can damage this circuit ?
  8. E

    Re: coaxial cable and GHz frequency

    hi do you have any schematic with LM358 for this issue?
  9. E

    Re: coaxial cable and GHz frequency

    sorry dear Audioguru for my demurral my LNB drawing 92.6mA in standby mode. can yo help me for designing circut that starting alarm when this current goes to zero? thanks
  10. E

    Electronic Eavesdropping Devices Detector

    hi big duck please tell me if i change this circuit that u show me (modified) in the top of this page exactly what happen in my circuit circuit?
  11. E

    Electronic Eavesdropping Devices Detector

    hello my friends i built this project for three times  and not good work because i should keep this device near the bug until smooth work. do u have any idea?
  12. E

    have you simple digital volume control

    hello do u have any circuit about simple digital volume control for  changing low or high with 2keys?? 
  13. E

    Electronic Eavesdropping Devices Detector

    hello audioguru please check this circuit for any problem. if haven't any problem i want to build it. and please tell me why S1 connecting to 1n4148 and connect to GND? thank u very much.
  14. E

    Electronic Eavesdropping Devices Detector

    hello anybody i want to build a eavesdropping device detector that can detect only bug and good work and better than this project on this site. do u have any good project or idea about it???????????? for example see this attachment...
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    Electronic Eavesdropping Devices Detector

    hello thanks anyone do u know  where is the  buzzer in this circuit?
  16. E

    Electronic Eavesdropping Devices Detector

    hi what is your idea about this circuit? where is the buzzer in this circuit ??
  17. E

    Electronic Eavesdropping Devices Detector

    hi i have problem!!!!! all LEDs on because i am near by a computer. it is very bad when i shutting down computer in room all the signal was end. after it unfortunately all over the room even near the bug not gave a signal and only touching antenna with my hand have signal. unfortunately i didn't...
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    Electronic Eavesdropping Devices Detector

    hello this is eavesdropping device detector that i was build it. these green LED's that u can see is VU meters with LM3915. tell me your idea.
  19. E

    Electronic Eavesdropping Devices Detector

    hello i am making a eavesdropping devise and it is work but this project sensitive to anything very high. specially to any metal and sensitive to computer and for this project 9v battery don't good working. please tell me what can i do ? i wont sensitive to any metal i want sensitive to mobile...
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    Electronic Eavesdropping Devices Detector

    hello i have a question i am using BFR91  replace for BFR90 and for NTE112 replace similar to BA481. do u think these  components good work with together ? because my project alarming sequence. 
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