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Infra Red TV Remote Control Extender
Mr Bocquillion also says that after plenty of tests for his pleasure (because my job is became my hobby) he has made this circuit which is working very well. It is just necessary to built a sheild around D1 and IC1/IC2 to avoid risks of oscillations around 37kHz. I would like to point out that this circuit will also work with any other appliance using 37kHz as the IR modulating frequency. The original artwork was done in MS Paint, and as you can see is a very capable circuit.
I will be releasing some schematic components I have made for Open Office Drawing program later this year onto my site. These can be used to draw schematics and will be available in colour for clarity.
author: Guy Bocquillon, France
web site: http://www.zen22142.zen.co.uk/