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The Natural Philosopher[_2_]

On 31/01/2020 08:21, wrote:
On Friday, 31 January 2020 00:41:11 UTC, T i m wrote:

Test for you then ... I'd like to build a simple FM broadcast receiver
that I can tune (and lock) to R4 for our daughter to listen to when
she's out walking the dog.

A kit would be nice but I don't want anything that scans, unless it
can be locked on a single freq (93.2 MHz?) at startup?

I think it would only need to drive a small speaker or single
headphone.

SiLabs make some very nice single-chip FM radio receivers. You can
control the tuning over i2c. Some versions have support for actively
tuning a loop antenna. All you need is one of those and a small
microcontroller to preset the tuning.

John

I built something along these lines years ago. It was downconverted to
100Khz IF or so and then pulse counted to demodulate..

It's very possible to do this these days with all sorts of circuits
being available.

--
"The great thing about Glasgow is that if there's a nuclear attack it'll
look exactly the same afterwards."

Billy Connolly