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Ir dongle for pda's audio port

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Mantovani

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griffin ir dongle

Hello,

has anyone found the schematics for the Griffin Technology's Ir dongle. More information is at

**broken link removed**

The system is pretty interesting, it is attached to the audio port of e.g. pda, and the audio signal is used for the ir-led to create the control signals for devices. Like the article of the link says, it contains only a couple components, but the wiring is not presented. Has anyone made similar dongle?

Thanks,
 

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