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  • aswinsharif1412 commented on randofo's instructable Electronic Stethoscope5 months ago
    Electronic Stethoscope

    I need a simple electronic stethoscope to find termites rough location inside woods around my house and stumbled upon this project. While the idea is excellent, the implementation need some improvements. For example, the critical missing thing: Schematic diagram (!). You can't just pick resistor and IC and put together randomly. Secondly, for a working stethoscope you need band pass filter (i.e. tone control: bass and treble. Even better if there is simple "equalizer") otherwise the microphone will pick any frequencies and it just means: noise. My suggestion: go to eBay and pick these cheap modules: (1) microphone with variable gain pre-amp (3.7v-5v), (2) 5v amplifier (usually available in stereo), (3) bass-treble control (passive one, only consist of capacitors and resistors,...

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    I need a simple electronic stethoscope to find termites rough location inside woods around my house and stumbled upon this project. While the idea is excellent, the implementation need some improvements. For example, the critical missing thing: Schematic diagram (!). You can't just pick resistor and IC and put together randomly. Secondly, for a working stethoscope you need band pass filter (i.e. tone control: bass and treble. Even better if there is simple "equalizer") otherwise the microphone will pick any frequencies and it just means: noise. My suggestion: go to eBay and pick these cheap modules: (1) microphone with variable gain pre-amp (3.7v-5v), (2) 5v amplifier (usually available in stereo), (3) bass-treble control (passive one, only consist of capacitors and resistors, no chip or transistor to drive it). And lastly: 3.7v charger module -this is used for building diy powerbank. Yes, I have build one myself but had not have chance to create instructable document. The quality is not bad but I am still find sifficulty to locate the exact termites position.

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  • aswinsharif1412 commented on Mjtrinihobby's instructable Solar Powering My Home!11 months ago
    Solar Powering My Home!

    You should stand in front of some college students or public officials to share your offgrid life experiences and persuade people to start living green!Just quick question: how much is the initial investment to start using solar panel powered electricity?

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