I decided to build this style of Diptych Sundial found at this website: http://www.mysundial.ca/tsp/diptych_sundial.html
I changed this design and decided to add the Equation of Time adjustments for my location for the first and the fifteenth of each month to the vertical face.
I used a compass and straight edge to lay out the clock face for the horizontal surface. I free hand drew the 15 and 45 minute lines in between the hour and 30 minute lines.
I cut the horizontal and vertical faces from 3/4-incy, balticv birch plywood scraps I had on my tablesaw. I made the pieces 5-inches square. The missing triangular corner was due to the fact that the scrap piece of wood I used was not wide enough to make a square corner. It has no effect on the sundial.
I bought two small hinges at Home Depot and put them on the edge. I chose the edge with the missing triangle corner to minimize the look of the finished sundial.
I used scissors to cut the clock face to fit the horizontal face and glued it in place. I made sure the clock face was properly alighed by the pencil marks at the 6 am and 6 pm positions of the horizontal face, parallel to the bottom edge of the horizontal face..
I then cut to fit and glued the EOT adjustments to the vertical face.
I used black threaded fishing line for the Gnome of this sundial. I cut the piece from the fishing pole I used (and still have) when I was young.
I used a right angle drawing tool to align the horizontal and vertical faces, 90 degrees from each other, threaded the the fishing line through the two holes I drilled and affixed it taught.
My Diptych Portable Sundial is now ready to use.
