A pinpointer is currently referred to as metal detectors of compact parameters, which differ in accuracy class. Metal detectors are used to identify hidden wires and communications when performing repair and construction work, as well as when inspecting people and luggage. More details at lopata.com.ua/pinpointer .
The main part in pinpointers is considered to be the coil, most often of the orthogonal type. Much, first of all, depends directly on the accuracy of the device. To assemble the pinpointer with your own hands, you should learn about popular configurations.
Devices with 3-wire capacitor
It is rather difficult to build such devices with your own hands. For a three-conductor capacitor, exclusively linear types of modulators are used, which are incredibly difficult to find even in modern conditions of a wide range of radio engineering.
The coil in such devices is mounted directly under the amplifier. It is possible to additionally equip three-conductor devices with additional zener diodes, which are great for increasing the sensitivity of this device. The use of batteries from an ordinary flashlight is also suitable as a rechargeable device.
Pinpointer with two-wire capacitor
To create such a device, first of all, you should take care of creating a case intended for the device. For this purpose, many professionals recommend using a traditional flashlight. At this stage, the real problem can be finding a normal suitable modulator. A non-linear analog is usually used. Such devices, as usual, are characterized by the front location of the coil, the batteries, in turn, are placed behind the modulator. You can take the battery from the same flashlight.
The required capacity of the battery device must be at least 200 mAh, which is quite enough for uninterrupted operation for 25 minutes. In addition to the above, there are devices with signal interruption, for the manufacture of which the body of the flashlight is also taken.
