Gadget Freak

Gadget Freak Case #240: MEMS Mics Up Telescope

Jerald Cogswell created a sonic telescope to grab sound and bring it as close to the user as the image.
Click here for build instructions, BOMs, and more.
2 saves
5/9/2013 | 6 comments
View Comments: Threaded|Newest First|Oldest First
Charles Murray
User Rank
Nature documentaries
Charles Murray   5/15/2013 7:29:34 PM
This technology would be great for nature documentary directors, who must stand 200 yards away from dangerous animals while they record. The low signal-to-noise would enable them to pick up sounds from a distance without a lot of distortion.  

William K.
User Rank
#240 MEMS Microphone
William K.   5/31/2013 8:07:06 PM
This is a project that is very interesting, even moreso the version using the satellite TV reflector. So where is the information, I would like to build one of them. I did not get the name or model number of the microphone, but it sounds like an Analog Devices type thing. Where is the project build information, please?

User Rank
Re: #240 MEMS Microphone
78RPM   7/12/2013 12:06:55 PM
William K, It looks like the Build Instructions have retired from the article. If you wish to send me an email at jjfrigatebird@gmail.com I will reply with the parts list and build instruction, assuming the editor has no objection.

You are correct that the devices are Analog Devices.  The mic is an ADMP504, the difference preamp is an AD8273, and the output amp is an AD8397 configured as a difference amp to handle the balanced line from the preamp stage. The quality of sound is excellent and would probably serve in a recording studio with proper mounting.

Maybe I'll see you in another Digi-Key Design News webinar next week.

Jerry Cogswell

User Rank
Re: #240 MEMS Microphone
78RPM   7/12/2013 4:46:20 PM
William K, I discovered that you can get to the build instructions by clicking on the link above the one you probably selected. Go to the most recent Gadget Freak column and look at the links to other Gadget Freak blogs in the right column. Click on #240 and you should get the link that has build instructions.

William K.
User Rank
Re: #240 MEMS Microphone
William K.   7/14/2013 9:53:15 PM
78RPM, thanks for the clues. I have often been frustrated in my attempts to get infomation about the gadget freak projects. The useful details have always appeared to be withheld, so usually I just abandin the effort to get any details.

User Rank
Re: #240 MEMS Microphone
78RPM   7/14/2013 10:52:46 PM
glad we both figured it out.

Partner Zone
Related Videos
Gadget Freak
Gadget Freak Case # 265: Propane – ...
This project is an experiment in generating supersonic ...
Gadget Freak Case #267: What Happens ...
The Arduino is great for connecting with hardware but has a ...
A Lesson In Lithium-Ion Volatility
During a teardown of the iPad Air and Microsoft Surface Pro ...
Gadget Freak Case #266: The Window Watcher
The Window Watcher stops the burglar before he does damage ...
Gadget Freak Case # 264: Drink Delivery ...
The DDV-IP is an inverted pendulum driving machine. The ...
Gadget Freak Case #263: Midi Key-tar
Adam Berger hacked a computer keyboard into a mini key-tar ...
Gadget Freak Case #262: Boat Lift ...
Dick Bipes couldn't find a boat lift remote with the specs ...
Gadget Freak Case #261: Dr. Seuss ...
Colorado State University students have created a Dr. Seuss ...
Gadget Freak Case #260: Arduino Solar ...
This solar charge controller, which is placed between a ...
Gadget Freak Case #259: Gag Bomb ...
This Hollywood movie-style gag bomb doubles as an alarm ...
Gadget Freak Case #258: Memory Wire ...
Marin Davide created a prototype of a moving biped using a ...
Gadget Freak Case #257: TempBug -- ...
You can put this thermometer anywhere with WiFi and collect ...
Design News Webinar Series
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
12/10/2014 8:00 a.m. California / 11:00 a.m. New York
11/19/2014 11:00 a.m. California / 2:00 p.m. New York
2/25/2015 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Jan 26 - 30, IPv6 for Micros – Hands-On
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  67

Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Last Archived Class
Sponsored by Stratasys
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service