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Circuits Audio/Video audioFM
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Circuits Audio/Video audioFM
audioFM
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Do you want to listen to MP3 on your radio? But yout radio doesn't have a AUX IN or any other Input? Then audioFM can help you. audioFM takes audio signals from a headphone plug and converts it into radio UKW FM signals.
The heart of this small FM Modulator is a tuneable voltage controlled oscillator (VCO) from Maxim-IC called MAX2606. This VCO operates from 70MHz to 150MHz and has a up to -8dBm differential output amplifier.
Note: in many countries it's not allowed to broadcast in the UKW (normal Radio) frequency bands!! So use this at your own risk!
The audioFM project is based on schematics found in the Internet and from Elektor Magazine!
The EAGLE CAD files will be published at http://tobiscorner.floery.net/ for download after testing. Maybe a filter for pre-emphasis should be added to get a better audio quality.
Copyright Tobias Floery http://tobiscorner.floery.net/
The heart of this small FM Modulator is a tuneable voltage controlled oscillator (VCO) from Maxim-IC called MAX2606. This VCO operates from 70MHz to 150MHz and has a up to -8dBm differential output amplifier.
Note: in many countries it's not allowed to broadcast in the UKW (normal Radio) frequency bands!! So use this at your own risk!
The audioFM project is based on schematics found in the Internet and from Elektor Magazine!
The EAGLE CAD files will be published at http://tobiscorner.floery.net/ for download after testing. Maybe a filter for pre-emphasis should be added to get a better audio quality.
Copyright Tobias Floery http://tobiscorner.floery.net/
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