I cannot find an eletret condenser microphone?

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In summary, the conversation was about finding an eletret condenser microphone for a circuit project. The person asking for help was directed to different electronics suppliers and given advice on what to look for in a microphone. They were also informed that they could use any type of microphone in the circuit, but would need to make some adjustments. Ultimately, they were able to find and purchase the microphone from Sparkfun.
  • #1
I am trying to follow a guide that I found online and it requires an eletret condenser microphone...which no one seems to carry (my electronics shop, Fry's Radio-shack).

I am still a started level guy so I really don't know what to look for when it comes to microphones so I was hoping one of you could identify it.

here is the guide along with the schematic.

http://www.electronicpeasant.com/projects/ledlamps/ledcolor.html



thank you!
 
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  • #2
You could probably use any kind of mic in that circuit, but check my two favorite surplus suppliers:
http://www.allelectronics.com/
http://www.goldmine-elec.com/

ps...all those transistors in the schematic gave me a big headache...
 
  • #3
electricman12 said:
I am trying to follow a guide that I found online and it requires an eletret condenser microphone...which no one seems to carry (my electronics shop, Fry's Radio-shack).

I am still a started level guy so I really don't know what to look for when it comes to microphones so I was hoping one of you could identify it.

here is the guide along with the schematic.

http://www.electronicpeasant.com/projects/ledlamps/ledcolor.html



thank you!

You mention Fry's Electronics. Are you here in Silicon Valley?

If so, give Halted Electronics in Sunnyvale a call. They carry all kinds of new and surplus stuff:

http://www.halted.com/

.
 
  • #4
An electret microphone looks like this:

08635-03-L_l_th.jpg


Sparkfun in Colorado have them for $0.95, plus shipping.

http://www.sparkfun.com/products/8635

Most electronics stores should carry them.

Even this one:
http://www.radioshack.com/product/index.jsp?productId=2062215
at 3 times the price. They call it a condenser microphone.

Note that all of these have a small amplifier built in. That is why they need a DC power supply via a resistor.

If you use another type of microphone, like a dynamic, you will need to remove the 4.7 K resistor above the microphone in the schematic.
 
  • #5
thanks guys! those site really helped!

just ordered the mic off of sparkfun :)
 

1. What is an eletret condenser microphone?

An eletret condenser microphone is a type of microphone that uses a permanently charged material, called an eletret, to convert sound waves into electrical signals. It is a popular type of microphone used for recording and amplifying sound in various industries, including music, broadcasting, and telecommunication.

2. How does an eletret condenser microphone work?

An eletret condenser microphone works by using the eletret, a permanently charged material, as one of its plates in a capacitor. When sound waves enter the microphone, they vibrate a diaphragm, which changes the distance between the two plates, causing a change in capacitance. This change in capacitance is then converted into electrical signals that can be amplified and recorded.

3. What are the advantages of an eletret condenser microphone?

Eletret condenser microphones have several advantages, including their small size, low cost, and high sensitivity. They also have a wide frequency response and can capture subtle details in sound, making them ideal for recording vocals and acoustic instruments. Additionally, they have a low self-noise, which means they can capture clear and accurate recordings without picking up unwanted background noise.

4. How do I choose the right eletret condenser microphone?

When choosing an eletret condenser microphone, consider factors such as your budget, the intended use of the microphone, and the type of connection it requires (USB, XLR, etc.). It's also important to research the microphone's frequency response, sensitivity, and self-noise to ensure it meets your recording needs. Reading reviews and comparing different options can also help you make an informed decision.

5. Where can I purchase an eletret condenser microphone?

Eletret condenser microphones can be purchased at many music and electronics stores, as well as online retailers. Some popular brands of eletret condenser microphones include Audio-Technica, Shure, and Rode. When purchasing online, be sure to read reviews and compare prices to ensure you are getting a quality microphone at a reasonable price.

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