Sorry I missed that. The motion sensor is a Parallax PIR Motioon Sensor. It can be found at this link http://www.robotshop.com/en/parallax-pir-motion-sensor.html
I have another project that does have it's eyes move, on YouTube. This particular project did not ask for the eyes to move and I didn't have the budget to add the feature (it was done on commission for an LA artist).
What motion sensor are you using? I don't see it specified in the BOM or the text. Otherwise, the project looks pretty well documented. As someone else said, it would be a lot cooler to have the eyes move as well.
I've seen several examples of eyes iike this where the pupils are following you as you move around in front of them -- it is genuinely spooky! Even spookier when you try to trick it by having two people in front of it and one eye follows each one!
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You should have added the eyes rotation feature even if it was not requested, as it would add more details and beauty to your product. It would not take much time as you already stated, but would increase the value of your product significantly. More over the video was too short to comprehend. However the blinking feature looks nice.
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