k7elp60 Active Member Nov 8, 2008 #21 the_drewster said: Here's a new list: 2. It needs to fit in a tiny tiny place. Drew Click to expand... You might tell us the physical dimensons to the tiny tiny place. A pair of A76 batteries would be approximately 1/2" in diameter and about 1/2" tall. It is possible to solder all the components together without a circuit board.
the_drewster said: Here's a new list: 2. It needs to fit in a tiny tiny place. Drew Click to expand... You might tell us the physical dimensons to the tiny tiny place. A pair of A76 batteries would be approximately 1/2" in diameter and about 1/2" tall. It is possible to solder all the components together without a circuit board.
audioguru Well-Known Member Most Helpful Member Nov 8, 2008 #22 The mic and its amplifier will be powered all the time draining the tiny battery unless you add additional circuits to pulse them on and off. With a current of only 190uA the voltage of an A76 cell drops quicky to only 1.4V. Very few opamps work from a supply of only 2.8V.
The mic and its amplifier will be powered all the time draining the tiny battery unless you add additional circuits to pulse them on and off. With a current of only 190uA the voltage of an A76 cell drops quicky to only 1.4V. Very few opamps work from a supply of only 2.8V.