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);
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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.
well explained, so no questions
As they say, incorrect statement, usually getting more attention /responses, than well formulated question.
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.
