Pages: [1]   Go Down
Author Topic: FM Radio Shield (DIY).  (Read 2322 times)
0 Members and 1 Guest are viewing this topic.
Montreal
Offline Offline
Edison Member
*
Karma: 23
Posts: 2487
Per aspera ad astra.
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Arduino Uno, proto-board,few resistors and cheap radio from local convenience store, thats all you need to build FM radio shield.

 Capabilities:

- auto-scan full FM band;
- store/recall  20 radio stations to/from the list (EEPROM);
- print a list of radio stations;
- switching tuner up / down along the list;
- fine tunning;
- calibration of heterodyne VCO, using RF broadcasting data as high accuracy Signal Generator;
  (Least Squares based 2-nd degree polynom fitting, about +-0.1 MHz or 0.1% precision);
- debug Command Line Interface.

 Check it out: http://coolarduino.wordpress.com/2012/10/21/diy-arduino-fm-radio-shield/



* DSCF0219a.JPG (216.58 KB, 1072x804 - viewed 34 times.)

* DSCF0220a.JPG (184.83 KB, 1072x804 - viewed 11 times.)
« Last Edit: October 25, 2012, 11:48:43 am by Magician » Logged

0
Offline Offline
Full Member
***
Karma: 4
Posts: 218
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

166 views and no posts . !
Well I think what you have is interesting. My interest is in your knowledge of how to scan radio frequencies . Do you know anything about how this might be made to work on other frequencies ,433Mhz , 200Mhz or 20Mhz for instance?
What particular parts would need to be changed and what other matters might be considered? (obviously the receiver, but could a simple receiver be made or bought )

It might have uses in scanning for bugs , and spectrum analysis.

You put in a lot of work to do this and I thank you for posting it.
« Last Edit: October 31, 2012, 04:22:43 pm by april » Logged

Montreal
Offline Offline
Edison Member
*
Karma: 23
Posts: 2487
Per aspera ad astra.
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

 I had close to 1.500 visitors on web page yesterday, after references were posted in news/blog sections : http://www.adafruit.com/blog/2012/10/30/diy-arduino-fm-radio-shield/ and
http://www.freetronics.com/blogs/news/6812702-diy-fm-radio-arduino-shield#.UJGc_7Rl9RS
(thanks).
 Regarding no posts here, there are at least two reasons:
 - topic quite "specific";
 - well explained, so no questions  smiley
 As they say, incorrect statement, usually getting more attention /responses, than well formulated question.
 
Quote
Do you know anything about how this might be made to work on other frequencies ,433Mhz , 200Mhz or 20Mhz for instance?
IC TDA7088 works over 0.5 - 110 MHz, so it would be quite easy to cover this range. 200, 433 and up needs different chip, I'm sure there are many of similar functionality. Problem to get a BOB ( prototype boards ) which include IC with all peripheral hardware (R/L/C) below $2. May be channel selector from HD box, or an old VHS / TV receiver would be an option.
Logged

Brisbane, Australia
Offline Offline
Edison Member
*
Karma: 29
Posts: 1074
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

- well explained, so no questions  smiley
 
FWIW I was a lurker, and that's the reason I didn't.  I did click 'notify' though in case there were any more updates or questions.  smiley
 
As they say, incorrect statement, usually getting more attention /responses, than well formulated question.
I'd not heard that before, but it makes perfect sense !

Thanks for sharing,
Geoff
Logged

"There is no problem so bad you can't make it worse"
- retired astronaut Chris Hadfield

Pages: [1]   Go Up
Jump to: