hmm...
i just remembered that i have seen the op amp circuits before...
but this circuit will just work fine right?
if i connect any circuits to the soundcard, should i take care of the current that will be flowing into the soundcard? -- even if i have limited the soundcard input to +/-1V?
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anyway.. we're next asked to design another buffer/driver circuit that will be used as a driver to drive a load based on the output of the sound card...
my question is:
as i know, the output from the sound card has a very small current and voltage... so correct me if i am wrong, i need to design an amplifier (probably an op amp) to amplify the voltage, followed by a current buffer (probably a common base BJT configuration) to drive the load?
i just need to get a rough idea because its a design course, so the exact load and requirements of the design will only be disclosed when i attend the lab session.
thanks for all the help guys