Making a solar compass Answered
I realized a while ago that if you put something on a rotating mount inclined to your latitude and adjust up or down for the inclination of the sun (up or down from its equinox path) for that day of the year, you have a compass.
For instance, today the sun is just over 23 degrees off its equatorial path. So you have a stick pointing straight out from the mount at a right angle and you just angle it down by 23 and a half degrees.
So you tighten it in place at that angle. Next you combine rotating the entire thing on the ground (keeping your latitude angle correct) and you rotate the mount itself until the stick points straight at the sun. At this point, no matter where you are on earth, your mount is inclined in line with north/south.
I have 2 little test compasses to try this but it was fully cloudy all day so I cannot try it out.
One uses a Fresnel lens and the other uses a magnifying glass to line up the sun.
Just wondering if anyone else has done something like this? Solar compasses did exist and I had a look today. They do not look like my thing at all. They look really complicated!
I will post a year of inclination data shortly.