Let's Make Robots!

wanted: fm stereo receiver

This is an electronics question that has little to do with robots. But this forum seems a good place to ask it anyway.

For an upcoming diy project, I am in need of some advice on integrated radio circuits. For my 93 yr old grandmother I hope to build a radio that can do this:

  • receive fm radio stations (over a central antenna system, i.e. cable)
  • in stereo
  • drive two 4-8 ohm speakers
  • remember up to 30 preset frequencies
  • micro controller tells radio which station or which frequency to tune
  • produce Sound That Does Not Suck (STDNS quality)
  • perhaps will be expanded with a CD player
  • looks beautiful and compact (this would be a non electronics issue, so forget it)
I intend to build the case and the controls myself. Leaving anything off that might confuse the user. Not that my gran hates technology or is getting too old to learn how to operate gadgets. But because modern stereo equipment does not respect her desire for KISS designs and interfaces.

So please help me if you can. Do you know a suitable radio IC to start out with? Do you have experiences with these ICs to share with me? Does it take a digital input for frequency choice?

What kind of amplifier am I looking for? Another neatly packaged IC would be my preference.

Thanks in advance, 8ik


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My only expeience of RDS is here inthe UK, where stations only put the station name. (So far as I can see.) I would doubt it can be switched off. The person who invents a way to switch off adverts will be a rich person, indeed! I hope they don't start putting scrolling messages on my display - I believe that would be a distraction and therefore a driving hazard.
sure is! some stations give the locations of mobile speed traps through RDS -> double hazard!

Simplest is also best for inventors. I suggest you get your hands on a car stereo and a wallwart to power it with. In my other life, I design and build free one-off devices to help disabled people. I've used car stereos in the past specifically for their KISS interface.

PS - I belive this reply to be the first post on the new server....