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Metal Locator Circuit – Circuit Schematic
Metal Locator Circuit
The metal locator uses a one-transistor oscillator and an AM radio to detect metal. Transistor Ql is a pnp transistor that is connected to an oscillator. Resis...
Permanent Magnet Detector – Circuit Schematic
Permanent Magnet Detector
In this circuit, oscillator Ql runs at about 15 kHz and feeds mixer Ul. Ul has an internal oscillator that runs a...
Metal Detector – Circuit Schematic
Metal Detector
Using an oscillator running at 455 kHz, the metal-detector circuit produces an indication on the meter Ml. When the oscillat...
Metal Detector – Circuit Schematic
Metal Detector
An NE602 acts as a heterodyne detector and Ql as a sense oscillator. When Ll is brought near metal, it causes a charge in lo...
Minimal metal detector – Circuit Schematic
Minimal metal detector
This circuit is on oscillator with LI being a 4" diameter coil of 35 turns of #26 magnet wire. Metal in proximity to LI will cause the oscillator to shift frequ...
Metallic pipe detector – Circuit Schematic
Metallic pipe detector
This circuit uses a 15-kHz oscillator coil. Whan metal placed ixi the energy field is withdrawn, the oscillator voltage is rectified and compared to a reference...
Metal locator circuit – Circuit Schematic
Metal locator circuit
The search coil, CI and C2 form a tuned circuit for the oscillator which is tuned near the center of the broadcast band. Tune a portable radio to a station near...
1 transistor treasure locator circuit – Circuit Schematic
1 transistor treasure locator circuit
Locator uses a transistor radio as the de-tector. With the radio tuned to a weak station, adjust Cl so the locator oscillator beats against the received signal....
Metal detector with 4030 CMOS – Circuit Schematic
Metal detector with 4030 CMOS
This battery-powered metal detector uses four exclusive-OR gates contained in the 4030 CMOS integrated circuit. The gates are wired as a twin-oscillators and a ...
Metal Detector circuit with TDA2822
Here is a simple metal detector with TDA2822 and few NPN transistors. There is a small arrow connected from the Emitter of the T3 to the 10n Capacitor C4. That ...
Double oscillator metal detector – Circuit Schematic
Double oscillator metal detector
The circuit consists of two oscillators, both working at about 465 kHz. One uses an if transformer and the other uses an inductor (the search coil LI). The osci...
Small Metal Detector II – Circuit Schematic
Small Metal Detector II
A Simple design based on a CS209A IC that can give surprising results and draws very little current from a 9 volt battery. It worked good on the Bench, But not ...
Simple Metal Detector DIY – Circuit Schematic
Simple Metal Detector DIY
LED 1 will light and the buzzer turns on when the coil is changing inductance. The setup is easy, VR1 is adjusted ( away from any metal objects ) so that LED 1 ...
Metal detector with CS209A – Circuit Schematic
Metal detector with CS209A
A single chip metal detecor with a range of a few inches. This is useful for decting nails or screws in walls and floors, or for locating buried mains cable. Th...
Metal detector with 555 – Circuit Schematic
Metal detector with 555
This circuit detects metal and also magnets. When a magnet is brought close to the 10mH choke, the output frequency changes. ...
Metal Detector with CS209A – Circuit Schematic
Metal Detector with CS209A
A single chip metal detecor with a range of a few inches. This is useful for decting nails or screws in walls and floors, or for locating buried mains cable. Th...
Beat Balance Metal Detector – Circuit Schematic
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 ...
Coil Coupled Metal Detector – Circuit Schematic
Coil Coupled 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...
Metal detector using 555 – Circuit Schematic
Metal detector using 555
A very simple metal detector electronic project can be designed using a simple 555 timer integrated circuit . As you can see in the schematic circuit , this ele...
Metal detector circuit with TDA0161 – Circuit Schematic
Metal detector circuit with TDA0161
These metal detector circuit diagram is based on the TDA0161 monolithic integrated circuit , designed for metallic body detection by detecting the variations in...