Fabric Backing

Cut two pieces of durable fabric to the size of your matrix plus an inch in each direction for seam allowance. With right sides together, stitch lines as shown using a sewing machine (or by hand if you must), then chop off the corners so everything will sit nice when you turn it right side out:

Iron the rectangle if it isn't sitting flat, then top stitch as shown below to make battery pouches:

You can optionally add D rings or clasps at this step to make attachment points for your light. Stitch small bits of fabric around them and include them in your topstitched seam, plus a little X for added support.

Use Velcro tape at the openings of the battery compartments.

When you're finished, the fabric backing will appear as below:

Sew your circuit elements onto the fabric backing with tack stitches-- that is, sew and tie off the thread in discrete junctions. That way if one stitch gets broken, the whole circuit doesn't fall off of the backing!

This guide was first published on May 27, 2015. It was last updated on May 27, 2015. This page (Fabric Backing) was last updated on May 10, 2019.