Metal detector circuit with TDA2822
The metal detector circuit is shown here that the limits represent the sake of simplicity for a metal detector, but the design works remarkably well. It only us...
Simple Metal Detector
The Meter and other small circuit differences, gives better performance.
On the Schematic, I show Two Possible Coils.
1) The Ferrite Rod, creates an Accur...
Mini metal detecror (colpitts oscillator)
The circuit uses two CMOS IC’s
IC1 uses inverters connected as a Colpitts oscillator of 100KHz; the LC frequency determining elements being the search coil ...
BFO metal Detector Circuit with IC 4093
The circuit incorporates two oscillators, both operating at about 40kHz. The first, IC1a, is a standard CMOS oscillator with its frequency adjustable via VR1. T...
BFO metal Detector Circuit
By adjusting the oscillators so their frequencies are very nearly the same, the difference between them is made audible as a beat note, this beat note changes s...
Small Metal detector schematic circuit
This metal detector circuit needs to be powered using a 9 volts power supply ( DC) or a 9 volts battery .
The C1 capacitor is a variable capacitor with a val...
Beat Balance Metal Detector
Various embodiments of the BB metal detector have been published, and it has been widely described in the press as a new genre. Instead of using a search and a ...
The simplest Metal detector with one BC548
This is the circuit diagram of a low cost metal detector using a single transistor circuit and an old pocket radio..This is nothing but a Colpitts oscillator wo...
Pulsed Induction Metal Detector
As you can see, there is only one regulated 12 volt supply operating the entire circuit. I was able to do this simply by AC coupling the received signal to U3 ...
Zero beating Metal Detector
Both oscillators are built using MPF102 or J310 FETs. The Mixer is BF998 dual gate MOSFET. Audio IC amplifier is LM386 which drives a speaker. I have used a sta...
Mettle Detector circuit with Ic4093
This circuit needs a a Faraday shield, which is connected to 0V.To make this one wrap a tin foil around the coil.and connect to 0v.Then you can use this circuit...
Metal detector circuit with CS209A
This circuit is a Single chip metal detector.Actually we can use this one to detect metals.Specially,I think you have seen some army soldiers keep some thing to...
Simple metal detector with 4011
This simple metal detector requires only a handful of components and an evening's work. Built around a cmos4011 IC, is very robust and versatile. The 250 kHz re...
BFO Metal Detector using LF347N
Here's a metal detector circuit that frequencies of the two oscillators are then mixed in similar fashion to BFO, to produce an audible heterodyne. On the surf...
Metal detector with CD4011
The working principle of this cheap and easy to build metal detector circuit consists in mixing two equal frequencies which causes a low-frequency interference....
metal detector with MC AT90S2313
It's a simple metal detector design that has the quite good characteristics. the principle of operation which one differs from the classic schemes (BFO, transmi...
Low cost Metal Detector
Metal detectors are usually very complicated and it may be consist of very costly components and metal detector DIY circuits are rare. However this metal detect...
Metal Detector TDA 2822
The circuit described here is that of a metal detector. The opera- tion of the circuit is based on
superheterodyning principle which is commonly used in superh...
Coupled Coil Metal Detector
A Coil Coupled Operation Metal Detector made from readily obtainable components and using an ordinary medium receiver as a detector. The metal detector shown he...
Coupled Coil Metal Detector
A Coil Coupled Operation Metal Detector made from readily obtainable components and using an ordinary medium receiver as a detector. The metal detector shown he...