oundcard gets burnt when high currents are drained
through it. To protect the soundcard from such situations
they have been buffered prior to excitation of the test system.
Soundcard being an AC coupled device cannot be used for
DC measurements. However, indirect methods of
measurement of DC quantities through soundcard have been
successfully realized in [1] and [3].
Various soundcards have various operating voltage
levels. For some of them a value of one may refer to a
voltage level of 1V and for some other it may refer to a
voltage level of 0.4V. To tackle with such variations the