Pirate PI metal detector

Pirat – stands for:  PI – means a pulse metal detector, and RAT – author’s site:  “radioscot” . This metal detector has won the glory of a simple and inexpensive instrument, a small number of accessible, not scarce parts, with proper assembly and serviceable parts, the instrument works immediately, with almost no settings.

If we compare with the simple scheme of the metal detector at the frequency beats, here the depth of detection of the metal is much better. There is no discrimination in this type of metal detector, non-ferrous and ferrous metals react almost equally. But with certain skills, you can understand what purpose is under the sensor. Assembling and configuring this metal detector is much easier than the previously considered “VINTIK-PI” pulse metal detector .

Metal detector PIRATE does not distinguish between metals. But it is well suited for metal search and for beginners . Also a huge advantage of the pirate is its simplicity for independent production and availability of components – all the details of the metal detector cost a penny and can be found in any store of radio components or on the radio market. Also in the Pirates there are no programmable elements, which greatly simplifies the life of radio amateurs. Even a person with a minimum level of training will make a metal detector pirate with his own hands.

Characteristics of the PIRAT metal detector

● Power supply:  9 – 12 volts .
● Current consumption:  30-40 mA .
● Coin detection depth (25 mm):  20 cm .
● The depth of detection of large metals: 150 cm .
Of course, the characteristics are largely dependent on the parts used, coil diameter, build quality, etc.
The device consists of two main nodes, transmitting and receiving. The transmitting node consists of a pulse generator on a KR1006VI1 microcircuit (foreign analog of NE555) and a powerful key on an IRF740 transistor. The receiving node is assembled on the K157UD2 microcircuit and the BC547 transistor.

The device consists of 
1 Pulse generator 
2 Amplifier 
3 Integrator 
4 Comparator 
5 ULF

Be careful at the output of the IRF740 (400 volt) .

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