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Microphone questions

T

The_Muffin_Man

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Hey,

Does anyone know how to hook up a microphone between two things so the microphone will limit how much voltage goes to one of the things? And does anyone know where to get some small cheap microphones?


Thanks
 





I don't understand you're purpose. Why are you trying to use a mic as a voltage controller?
 
For mcrophone or other electronic stuff at a good price and fast shipping, I recommand digikey.com . They have really good service. As for your first question,  a microphone creates an electrical signal, so transforming this into some sort of resistance is not easy. Could you use a pressure sensor instead? It works by varying resistance, well I think so.  That's the best answer I can get you, or maybe you can try plugging the mic into an amp to generate a more powerful electric signal that should variate just like if you had a mic acting as a resistor.

I'm not a pofessional in electronics, but I've been assembling lots of them as a hobby in my basement, so I understand somewhat how they work :)
 
http://www.laserpointerforums.com/forums/YaBB.pl?num=1234087815

Thats why.

Thanks jamilm ill look into it..and ill take a look at digikey too ;)

Im not quite sure what he did to get it controlled by audio but i thought the microphone was the easiest way to. He said, "and the tilt axis drives pretty good with a couple tenths of a watt of audio from my amp" Anyone know how i could hook that up with my amp? I am just trying to get it so it will be "sound-responsive"

Thanks
 
The scanner will work like a speaker, vibrating for side to side from the inversing magnetic field. From what he said, I think you should try getting a 1 channel audio amp at 1 or 2 watts and plug as an input a microphone and as an outpout the coil.
 
Google "microphone pre-amp kit". They are about $10 if I remember correctly and come with all the parts, (including microphone) and full instructions.

Regards rog8811

[edit]Hmmmm I have just googled it myself and cannot find the one I used, it was very small, around an inch cube.....[/edit]
 
The_Muffin_Man said:
http://www.laserpointerforums.com/forums/YaBB.pl?num=1234087815

Thats why.  

Thanks jamilm ill look into it..and ill take a look at digikey too  ;)

Im not quite sure what he did to get it controlled by audio but i thought the microphone was the easiest way to. He said, "and the tilt axis drives pretty good with a couple tenths of a watt of audio from my amp"  Anyone know how i could hook that up with my amp?  I am just trying to get it so it will be "sound-responsive"

Thanks
Click to expand...
What you need in an amplifier that can drive a coil (like a speaker)....
here is a Data Sheet of the 8 pin LM386 Low Voltage Audio Amplifier with some application
circuits you can try... This will give you what you want.. 8-)

http://www.biltek.tubitak.gov.tr/gelisim/elektronik/dosyalar/6/LM386.pdf

[Edit] or you can do like Rog suggested....(posted at the same time again... ;D)


Jerry
 
rog8811 said:
Google "microphone pre-amp kit". They are about $10 if I remember correctly and come with all the parts, (including microphone) and full instructions.

Regards rog8811

[edit]Hmmmm I have just googled it myself and cannot find the one I used, it was very small, around an inch cube.....[/edit]
Click to expand...
Hey Rog...
I found this one..... 8-)

http://store.qkits.com/moreinfo.cfm/FK647

Jerry
 
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