Electronics > Microcontrollers

Single chip FM transmitter

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joelby:
This is all kinds of awesome - an FM transmitter made using a single ATTiny45, a battery, and nothing else.

HLA-27b:
wowzers  :o

mobbarley:
Saw that on HAD. It's cool, but i'm more impressed by a good sounding rickroll fitting in the internal memory.. I've tried coding some audio before and failed pretty miserably.

MikeK:
It's a neat trick, but the radio guys have been doing better transmitters with a transistor and a couple other discretes.  The problem with the AVR implementation is that it outputs a square wave, which contains the fundamental plus all of the odd harmonics (i.e. noise/interference).

IanB:

--- Quote from: MikeK on January 31, 2012, 01:41:28 am ---It's a neat trick, but the radio guys have been doing better transmitters with a transistor and a couple other discretes.  The problem with the AVR implementation is that it outputs a square wave, which contains the fundamental plus all of the odd harmonics (i.e. noise/interference).

--- End quote ---

But can a transistor, a battery and a couple of discretes be programmed to broadcast a tune without any external inputs?

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