Motion-sensing USB light controller (customizable)

This design adapts an off-the-shelf 3×AA battery powered motion sensing light to USB outut. The design is made to work with parts from an unbranded light with model number BO1101-WHG-04LF1-D (or -E, available from a particular orange big-box hardware store, amongst other places) but should be easily-adaptable to other models. (A photo of the donor device is the last in the list above and is also shown later in this document.)

###IMPORTANT NOTE
Since the **Download all files** link isn't working correctly **`Motion-sensing_USB_light_controller.zip`** can be downloaded instead. It contains all of the files, documentation, and images.

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### General notes

When it comes to donor devices, the size of PIR sensor is the main concern; the one from the aforementioned donor device has a body (not lens) diameter of 10.35 mm (the lens is slightly wider).

The case screws are scavenged from the donor device. I found that the screw heads are prone to stripping so applying minimal