lharris@gpu.utcs.utoronto.ca (Leonard Harris) (06/08/89)
Does anyone know of a single chip (or small component part count) to build a FM stereo radio that could drive a pair of headphones? I have seen those credit card size radios but they are too expensive and besides - I like to hack around. Thanks /leonard
kawaguch@girtab.usc.edu (Atsushi Kawaguchi) (06/08/89)
In article <1989Jun7.204321.225@gpu.utcs.utoronto.ca> lharris@gpu.utcs.utoronto.ca (Leonard Harris) writes: >Does anyone know of a single chip (or small component part count) to build >a FM stereo radio that could drive a pair of headphones? I have seen >those credit card size radios but they are too expensive and besides - I >like to hack around. >Thanks >/leonard I was looking into making FM stereo rcvr just a few days ago too. Went to Radio Shack, they have one chip FM receiver with little support parts (~10 R & C), and requires little or no caliberation. But it's only a mono receiver, not stereo. Chip costs ~$6. Looked into IC master, a chip that looked good was Signetics' TDA7020T. It can be used for both stereo and mono FM, and I think it's got auto mute. Very little support components, and only 1 alignment is necessary. It can drive earphone w/ built in amp in mono application only. I don't know where you can get it (JDR, Hamilton-Avnet, call & find out). -Jun ************* Atsushi Jun Kawaguchi * U.S.C. * INTERNET: kawaguch@girtab.usc.edu * Computer * * Science *
heller@crd.ge.com (Aaron J. Heller) (06/16/89)
In article <4035@merlin.usc.edu>, Atsushi Kawaguchi writes: *In article <1989Jun7.204321.225@gpu.utcs.utoronto.ca> lharris@gpu.utcs.utoronto.ca (Leonard Harris) writes: *>Does anyone know of a single chip (or small component part count) to build *>a FM stereo radio that could drive a pair of headphones? * *I was looking into making FM stereo rcvr just a few days ago too. *Went to Radio Shack, they have one chip FM receiver with little support *parts (~10 R & C), and requires little or no caliberation. But it's *only a mono receiver, not stereo. Chip costs ~$6. *Looked into IC master,a chip that looked good was Signetics' TDA7020T. Another solution is to use an LM1800, a one chip stereo decoder. These are readily available and work very well. -- Aaron Heller (heller@crd.ge.com uunet!crd.ge.com!heller)