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Recent content by burai

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    Ear headphone with low sound

    thanks you i decide to use one of pam8xxx and forget the circuit from post#1 the main problem is the power source it toke me in new way by use mini Rechargeable battery »» Switching Power unit and stabilize the volt
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    Ear headphone with low sound

    i read PAM8403 data sheet Absolute Maximum Ratings : Supply Voltage =6v how about make voltage divider and stay at 5v? file Attached - - - Updated - - - right to ground ~= 0.7v left to ground ~= 0.7v
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    Ear headphone with low sound

    thanks mr BradtheRad it will be my next option if Switching Power supply not work - - - Updated - - - thanks every one - - - Updated - - - thanks every one
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    Ear headphone with low sound

    thanks mr Audioguru i can do Switching Power supply unit that use XL6009 and search for another op amp but do Switching noise here ignorable ? also dose coin cell suit for Switching ? so if Switching is not recommended i will reduce gain from 3 to 2
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    Ear headphone with low sound

    thanks mr d123 seriously you helped me i want very few component and lite circuit so i plan to use coin cell first a rail-to-rail if not i have to lower the output - - - Updated - - - from post #5 thanks mr Klaus ok i will do google search for dedicated earphone ic and after read it data...
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    Ear headphone with low sound

    sorry you say: Maybe use class D amplifier with low pass filter. my project have 2 input so i guess you mean classic old class D amplifier one input one output not ic based on class D amplifier technology someone set behind keyboard wait for reply from he's admire teacher reply come that...
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    Ear headphone with low sound

    thanks mr Klaus ok i will do google search for dedicated earphone ic and after read it data sheet i will post my effort about class D amplifier is it will be 2 unit ? one for right and second for left ?
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    Ear headphone with low sound

    thanks mr Brian ok i will use capacitors and load resistor i want to use LM158 but from it data sheet Input Voltage ( -0.3V to +32V ) but my Input Voltage go to (-0.7) sorry im confuse about -0.3 and -0.7 is -0.3v mean the lowest input voltage ?
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    Ear headphone with low sound

    hi every one i want to amplifi audio signal from phone i have ear headphone with low sound to do that i want to use smd dual op amp 1/2 for right the rest for left vin =0.7v , power in= 1mw gain=3 power source : 2 coin cell 3v speaker = 600 ohm (from some set) could it work without lead from op...
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    ic8038 can this work

    yes it's alot of power but i have to do it no i can't use household electricity for the application you know mr audioguru i assume you think all about dissipation as heat it because my plan is doubtful as it clear i can use either modified sin model or pure sin wave model thanks you for being...
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    ic8038 can this work

    ok mr Audioguru i need 220v ac . 50hz power 3000 w so i will start to make the circuit with pwm model using pic microcontroller and post the circuit here thanks for help
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    ic8038 can this work

    thank mr fvm for reply if i design circuit like audio amplifier that amplifer 3 or 4 volts sine , 50 hz and feed them to transformers to be 220 ac 50 hz can it be
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    ic8038 can this work

    first im here because before 2 week ago i see one of your reply for someone it help me and now i see all the magic here in this forum as good people now if sg3524 not work here as i understand from your reply sorry may you suggest another way or another ic also mr betwixt Excuse me im...
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    ic8038 can this work

    All what i think about is that generate 220 ac from 12 ac without ripple for that i think i can use sin wave source thank mr Audioguru now i understand thate connect 2 transistor in series with same input signal will make them short circuit thanks also Excuse my bad english
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    ic8038 can this work

    thanks mr audioguru Excuse me im bad at english im think to use that sine wave signal also i know that the circuit most contain push pull stage now if i replace ic sg3524 with two ic8038 can it be or the same error
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