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is the lm358 good to amplify the signal from a mic and then use the other opamp in the ic as a comparator so that it gives a logical HIGH when the signal level increases to some desired value?? would that work
i chose the lm358 purely since it is widely available
rectify ? what do you mean?
thanks Nigel
hmm.. it is turning out to be a problem then to find an opamp with single supply low voltage (5V max) available and suitable for the job....
hi,
Whats your location.?
Quote:
Originally Posted by Nigel Goodwin
Try reading the 'sticky' at the top of this very forum.
hi nigel, i saw the sticky note diagram...thanks a lot, one last question just to make sure... the single supply technique shown in the diagram is for when one needs to use only a single supply and the op amp is made to work with dual supply right?
Yes - except ALL normal opamps are made to work with split supplies, even the 'single supply' ones.