In this tutorial, you'll learn how to build a do-it-yourself (DIY) metal detector using a proximity sensor with Arduino. Many similar projects use a coil and transistor, but it's possible to use a proximity sensor instead of a coil.
NE555 is a precision timing circuit capable of producing accurate time delays or oscillation. A NE555 has three basic modes of operations. In the time delay or mono-stable mode of operation, the timed interval is controlled by a single external resistor and capacitor network.
A simple metal detector circuit diagram and schematic using a single transistor and a radio. This metal detector/sensor project is easy to make and is an application of Colpitts oscillator.
Simple Metal Detector Project using 555 Timer IC. You can find a metal detector at airports, theaters and various other public places. They are used for the safety of people to detect anyone carrying a metal (Arms etc). In this project we are going to design a simple metal detector circuit.
The post explains 9 simple metal detector circuits using LC tuned concept, magnetic absorption concept, and the beat frequency oscillator (BFO) concept. The BFO technique is considered to be the most accurate and reliable methods of detecting metals.
A metal detector circuit is an electronic circuitry that can detect the presence of a nearby metal object. It's largely used in the security and industrial sectors to identify the presence of metal objects in otherwise non-metallic materials.
There are three main parts in the metal detector circuit: the LC Circuit, the Proximity Sensor, output LED and the Buzzer. The coil and the capacitor C1, which are connected in parallel, will form the LC circuit.
The metal detector circuit shown here must represent the limits of simplicity for a metal detector, yet the design works surprisingly well. It uses just one 40106 hex Schmitt inverter IC, a capacitor and a search coil – and of course the batteries.
With the lowest sensitivity setting, the metal detector can pick up large items like soda cans, cell phones, and iron tools within a few inches away from the coil. On the highest sensitivity setting, smaller items like steel rings, screws, and coins within the same proximity can also be detected.
In this project, we show how you can build a metal detector circuit with a proximity detector IC and a few basic parts.
