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OK got it to work. Any Google search will tell you what the correct pin function is for the regulator; the image description in this DIY has in and out backwards. So assume that the diagram provided is a back view (soldering viewpoint). For everything else, I've made it as described.It works and that's all that matters; the IR unit I installed is a TSOP1836. If your PC has no serial connection then don't forget to order a cable to convert dsub 9 pin (male) to 10 pin main bord connection.Good job EEGG and thank you for this easy and working instructable.
I've made this thing but in a different fashion, the 7805 regulator shows the pins in and out in opposite direction in your description. Is there a purpose to this or is it a mistake? I've mirrored your diagram and then put the components in place.