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    insect attach

    hi sorry for problem about my english language. audioguru  can u speaking persian language very good? no because this is my mother's  language. also i can't speak english very good. and i living in iran and iran have bad methods for teaching english language. but u living in country that have...
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    Electronic Eavesdropping Devices Detector

    what is the mining of offset exactly ?
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    battery selector

    hello i want 3 or 4 battery sequent work. if no1 battery will be end no2 start and no2 will be end no3 start and .... do u have any idea?
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    Electronic Eavesdropping Devices Detector

    what can i do?
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    insect attach

    hello can u help me for insect attacking in springtime in my room? i need good circuit for insect. do u have ?
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    Electronic Eavesdropping Devices Detector

    hello V (input): 7.25v pin1 : 3.54v pin7: 1.97v pin8 : 3.73v pin14: 3.25v TR1: collector: 4.55v this project all of times have alarm even when i adjusting PT to right and left. what can i do ?
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    LED turn

    hello thanks for all of the help to me. this time please guide me for a circuit. i want turn on one LED very slowly(power LED) as matteral fact when i turn on key power led slowly light. please show me what can i do it.
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    Electronic Eavesdropping Devices Detector

    hello audioguru please tell me that when i build a Eavesdropping device(this circuit) for start after build what hapen after press the on swich (for start).
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    Electronic Eavesdropping Devices Detector

    hi audioguru i am changing this circuit that u said me but not have result always have  continously sound  i have to build a new circuit of this circuit do u have any idea about this circuit or any changing on it??? thanks
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    Electronic Eavesdropping Devices Detector

    hi audioguru do u know any circuit for detecting secret  digital camera?
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    Electronic Eavesdropping Devices Detector

    hi audioguru i am reducing value of R6  but i dont get good result. dont change it. do u thing in my circuit any component was damage?
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    dancing leds with counter

    hi every body i need 2 deferent circuit : 1. convertor :9v battery converting to 3v for LED very simple. 2. very simple soundmeter for 4 or 5 or 6 LED with 9v power supply. do u have anybody these circuits?
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    Electronic Eavesdropping Devices Detector

    hello audioguru thank you for your help to me. but not have result up to now because my circuit have alarm continously. please check it : collector  BFR90 : 2.91v IC : pin1 :1.29v pin7: 1.93v pin8 : 1.65v pin14 : 2.04v R6: 1.1M and with C2: 4.7 P1:volume  5k antena: 50cm wire and pin2 of LS...
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    Electronic Eavesdropping Devices Detector

    hello audioguru folowing ur question about collector and output of op-amp : tr1 collector : 3.9v op-amp: pin1: 5v pin7: 0.3v pin8: 0.3v and pin14: 7v what sall i do ?
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    Transmitter for students

    hello muhammad faraz for this system that must be unique which is not accessible to every one who is searching the net u need to progrmming assembly with microcomputer for example PIC and u should encoding ur data or wave that u can send it. good luck
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    Electronic Eavesdropping Devices Detector

    hello I am new user in ur forum I am very enjoy but many years ago reading ur information in any forum specially "audioguru" hello audioguru. I am make pcb eavesdropping device detector but not work no sound. i am testing all component but dont listening any sound of buzzer. no short circuit ...
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