Looking to make a Magnetometer (ie, Gauss Meter)
I'm looking for instructions to make a magnetmeter so I can measure my speakers. I have a few hard drives in my HT setup, and I want to make sure they will be safe with new placement, especially with the center channel being right underneath them. I found the following: http://www.coolmagnetman.com/magmeter.htm
But it's kind of expensive to build: $70US+
Is there a cheaper solution?