The search coils is a vital part of your metal detector. It is the flat, typically circular disk, which generates a magnetic field and senses metallic targets.
Nowadays, when interesting search locations have been largely eliminated, the most pressing concern for metal detecting engineers is improving the efficiency of their devices and their competitiveness when working in a team whose comrades are equipped with top-of-the-line detectors from well-known brands. How can we help our devices detect deeper, more reliably, and more selectively? …
Making a sensor for a homemade metal detector Zabava-m1 Making a coil The coil is wound on an oval mandrel glued from corrugated cardboard. Every ten turns are coated with epoxy resin, there are 50 turns in the coil in total, the wire diameter is 0.3 – 0.5 mm. The length of the coil is …
DD METAL DETECTOR SENSOR After some hesitation, I decided to repeat a good sensor (DD METAL DETECTOR SENSOR) manufacturing technology. Since the resin option was no longer satisfactory (heavy weight, unpredictability in behavior, strong influence of temperature). Its essence consists in using polyurethane glue from Kleiberit instead of epoxy resin . Namely glue, and not various types …
Metal detectors dictionary The metal detection industry is full of jargon that may not mean much to someone new to the hobby (or even veterans). That’s why at Garrett, we strive to keep you informed of the latest technology, trends and features in the industry. Why do we want to keep you updated? Because we …
Search coil design Introduction In radio engineering and metal detectors technology there is such a thing: connected circuits. They come with inductive or transformer coupling. We are interested in the first. The transmitter circuit (it receives power from the generator) is called the primary circuit. Assign index 1 to it ( L1, I1, Ф1). The receiver circuit …
Building the search DD coil for Induction Balance metal detectors The name of this Coil DD comes from the similarity between its two parts (the receiver and sender coils) and each coil takes the form of the capital letter D, meaning that it consists of two coils (double) similar to the letter D. The layout …
According to reviews on the Internet, the spider coil can work with any pulsed metal detectors, but for proper processing of discrimination and selection, you need to make the coil as close as possible to the parameters of the author’s coil. The result should be a coil with a small parasitic capacitance, with the following …
This document is intended to demonstrate one method of constructing Concentric Co-planer coils. While it is targeted toward the home hobby builder it is not as simple as the more popular DD coil configuration. The Concentric coil configuration does however offer some advantages over the DD coil. Some of these advantages include cost of construction, …
Among the owners of pulsed metal detectors Coil sensors enjoy deserved fame. It is with their help that it is possible to obtain record depths of detection for small objects the size of a coin. The design features of such sensors make it possible to obtain an increase in the depth of detection of targets …
This coil allows you to get more depth, but it is more difficult to manufacture. And so – we take a board or a piece of chipboard of the right size and draw two circles on it. The diameter of the first circle is 11cm, the diameter of the second is 18cm. Then we divide …
