IR Remote Control Extender by 4049

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This is an improved IR remote control extender circuit. It has high noise immunity, is resistant to ambient and reflected light and has an increased range from remote control to the extender circuit of about 7 meters. It should work with any domestic apparatus that use 36-38kHz for the IR carrier frequency. Please note that this is NOT compatible with some satellite receivers that use 115KHz as a carrier frequency.
The main difference between this version and the previous circuit, is that this design uses a commercially available Infra Red module. This module, part number IR1 is available from Harrison Electronics in the UK. The IR module contains a built in photo diode, amplifier circuit and buffer and decoder. It is centerd on the common 38kHz carrier frequency that most IR controls use. The module removes most of the carrier allowing decoded pulses to pass to the appliance. Domestic TV’s and VCR’s use extra filtering is used to completely remove the carrier.

Read More Source: Circuit : Andy Collinson
http://www.mitedu.freeserve.co.uk/Circuits/Interface/irext2.htm
Thank you.

This entry was posted on Tuesday, April 8th, 2008 at 11:09 am and is filed under Electronic Control. You can follow any responses to this entry through the RSS 2.0 feed.