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Posts Tagged ‘Walsh functions’

Parallax Propeller discriminates Walsh-modulated IREDs

Sunday, April 7th, 2013

Parallax Propeller guru Phil Pilgrim has posted this IR sensor/discriminator project on the Parallax Propeller forums. "Almost everyone here is aware of the advantages of modulated IREDs for rejection of background IR fluctuations and line-frequency noise from artificial lighting. Typically, the IRED modulation occurs at 38 kHz, to which the...

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Posted in infrared, LEDs, Parallax Propeller, sensors | 2 Comments »

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