ABOUT VEROBOAD

[loveguru]

HI.................AUDIOGURU.

I HAVE GOT ALMOST ALL COMPONENTS.
BUT WHAT WILL BE SIZE OF MY VEROBOARD?
AND I WANN THE PHOTOGRATH OF YOUR WORKING MODEL.
PLEASE GIVE ME THE REPLY SOON.
AND I WANN THE LENGTH OF MIC'S SHIELDED CABLE?
I HAVE TAKEN 1 METRE.
IS IT ENOUGH?
OK.
BYE.
LOVEGURU

 

[audioguru2]

Hi Loveguru,
I never built an Electronic Stethoscope. I just fixed the original defective project and called it version 2.
I did test a biased electret microphone with a shielded cable to an LM386 that had its gain boosted with a capacitor, and heard my heart (and the TV in the next room and my dog barking outside) very well. Since my test didn't have the precision low-pass filter from the project, I had those background sounds.
You must plan the Veroboard or PCB yourself. The circuit is fairly simple.
The length of the mic's shielded cable doesn't matter.

 

[ante1]

Hi Audioguru,

Please don

 

[audioguru2]

Hi Ante,
Look for an Indian or Chinese Veroboard copy. It won't be blue and it will smell very bad because it will probably be made from dung, like the stuff that I recently bought. He, he. ;D

 

[ante1]

Hi Audioguru,

You don

 

[audioguru2]

Hi Ante,
If it has copper strips on one side and its perforated, I'll use it even if it's made from dung, until I find a sweeter-smelling one!
I know! You know those vacuum thingys that take away smoke from soldering irons? One of those might take away the stink.
They use dung for fuel over there. How can they breath? ;D