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Circuit for output of Sound Card as frequency generator?

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blapcb

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Hi. I have a PC program that generates a waveform on the sound card. I would like to use this to inject a square wave to a circuit. Problem is, I don't think I can connect it directly to the circuit as the output volume of the sound card is not enough for my signal conditioning circuits (3.3v zeners). I would like to take the output of the sound card and run it through a circuit that will condition the output as 5v. I am not an analog expert (by far) but I think this can be done with a comparator or something like that. I would like to use the available 5v power supply I have and a minimum number of components. Really appreciate some pointers in the right direction. Thanks.
 

Sorry, the description is to vague to give a direct advice. What about negative voltage?
You can use a opamp to amplify any signal, but you got to know what signal strength you have. I'll guess about 1 volt peak value. Also, the sound card might have a capacitor to the output - and you need to take that in account too.
 

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