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hotpaw2
hotpaw2
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How should a mobile phone headphone audio output (such as the headset jack on top or bottom of an iPhone) be interfaced to a microcontroller digital input? (3.3V controller. Assume no audio frequency capable A/D is available.)

Assume a modulation scheme such as FSK or similar at appropriate frequencies.

How should a mobile phone headphone audio output (such as the jack on top of an iPhone) be interfaced to a microcontroller digital input? (3.3V controller. Assume no audio frequency capable A/D is available.)

Assume a modulation scheme such as FSK or similar at appropriate frequencies.

How should a mobile phone headphone audio output (such as the headset jack on top or bottom of an iPhone) be interfaced to a microcontroller digital input? (3.3V controller. Assume no audio frequency capable A/D is available.)

Assume a modulation scheme such as FSK or similar at appropriate frequencies.

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edit approved Jan 31, 2012 at 14:08
clabacchio
edit approved Jan 31, 2012 at 14:08
clabacchio
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Mobile phone headset audioTRS output to microcontroller digital input?

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hotpaw2
hotpaw2
  • 4.9k
  • 4
  • 33
  • 46

Mobile phone headset audio to microcontroller digital input?

How should a mobile phone headphone audio output (such as the jack on top of an iPhone) be interfaced to a microcontroller digital input? (3.3V controller. Assume no audio frequency capable A/D is available.)

Assume a modulation scheme such as FSK or similar at appropriate frequencies.