Stethoscope

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habbott

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Just finished building this circuit it work ok see attachment. How can I make it louder I have try increasing the pot to 100k but it only improved slightly. The pot is turned right up I would like more control of the volume. The circuit has no distortion at max volume.
 

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  • ear21.GIF
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Try removing R10 from the circuit. If it is too loud then try 3K3 for R10. Experiment a little.
 
Tryed increasing the gain but it started getting a static noise. I put it back to normal and now it is static noise all the time try replacing the IC and the transister but still noisy, must have a problem with on the capactors. Any idea where to look for this noise.
 
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