Thanks for all the replies. This is for the bike I keep in Thailand. I do keep a phone mounted to the handlebars and it does have a compass app, but it has a 5 minute timeout to save battery, and can be hard to see in bright sunlight, and I thought it would be nice to have compass headings at a glance. Some of the rural roads can be confusing over there, and a lot of the smaller ones aren't on Google at all, even paved ones. (And during the seasons I'm there, it's often very overcast or cloudy with no direct sunlight.) But sounds like this just might not be a good idea due to steel parts, as you all pointed out. Thanks again.
Last edited by 3940dxer; 07-13-19 at 01:10 PM.