[PROJECT] BBC Micro:bit – Metal Detector!

RE: [PROJECT] BBC Micro:bit – Metal Detector!

littleben1 — Tue, 18 Sep 2018 18:51:46 GMT

Nice!! wouldn't have thought about using the compass abilities for metal detecting, great job!

RE: [PROJECT] BBC Micro:bit – Metal Detector!

andrewm — Tue, 18 Sep 2018 08:39:30 GMT

A very cool project - well done.

I have a small suggestion for improvement. My guess is that the device has to remain still during detection, since the earth's magnetic field vector will interact with any motion. If so, you could resolve the vector length by taking the root-sum-square of the three-axis magnetometer outputs - i.e. length = sqrt (x^2 + y^2 +z^2). That should give a signal that doesn't vary as the device is rotated and you can simply subtract the vector length of the earth's field, as you do at present for each axis.

RE: [PROJECT] BBC Micro:bit – Metal Detector!

neilk — Fri, 07 Sep 2018 20:55:04 GMT

Nice neat project.

RE: [PROJECT] BBC Micro:bit – Metal Detector!

genebren — Thu, 06 Sep 2018 16:42:05 GMT

Slick little program. I had not thought that this would work, but I see that it does.

Nice!

Gene

RE: [PROJECT] BBC Micro:bit – Metal Detector!

mp2100 — Thu, 06 Sep 2018 11:10:07 GMT

Very nice, simple, and useful. Just like the micro:bit itself. I'll have to try this when I get home.