This cool little Pocket Metal Locator is sensitive enough to identify small Nails and Tacks in wood and compact enough to fit into awkward spaces making it convenient to carry and use for metal locating.
The unit has four independent search coils and color LED indicators making it easy to cover a larger search area quickly while being able to accurately identify the target.
This neat little device is self-calibrating with one button operation, rechargeable through a USB port and uses color LEDs, sound and vibration to indicate target strength.
Included in the instructable is all of the designs, testing, code and 3D files required to build on your own. I hope you enjoy building and using this as much as I have!!
This project can be viewed on Instructables here
I have been experimenting with Arduino based Metal Detection techniques over the past 2 years and have designed and tested a very stable pulse induction circuit. In this example, I was Iooking to employ multiple search coils and LEDs to show the position of the target to help with pinpointing. The 3D case design was centered on making the device easy to hold while ensuring the search coils were as close to the area being searched.