Control unit of the Ukrainiane impulse metal detector Koschey 5I/ K-5i / Кощей 5И 


Assembled and tested original block for the Koschey 5I metal detector. The block has a 5-pin connector for connecting a coil, which allows you to connect ordinary, deep and basket coils to it, and the metal detector automatically adjusts for them and selects the appropriate operating mode.

The Koschey 5I block is supplied complete with a plastic handle for mounting on a metal detector rod d=22mm. Also included are mating connectors for connecting the coil and power.
To power the metal detector, it is recommended to use 12V gel-type batteries, or three 18650 batteries connected in series.
Pulse induction metal detector k-5i koschey 5i

Of the controls, Koschey 5I has:
  • 1. Sensitivity adjustment knob.
  • 2. Power switch.
  • 3. Reboot button.
  • 4. Toggle switch for switching modes (Economy, standard and turbo mode). Depending on the mode, the power consumption of the metal detector and the search depth change. In Turbo mode, the duration of coil pumping increases and the maximum possible search depth is obtained. In the "economy" mode, on the contrary, the duration of pumping is reduced with a minimum loss of sensitivity.
On the back of the unit, there is a speaker and a 3.5mm headphone jack.
To adjust the sound volume, when turning on the metal detector, hold down the reset button and change the volume with the sensitivity adjustment knob.

Complete with the control unit, there are reciprocal connectors for connecting the power supply and the coil, a brief instruction in English.

In the manufacture of the coil, the ends of the coil windings are connected to pins #1 and #4 of the connector. And depending on the type of coil, between contacts No. 2 and No. 3 are installed:
  • 1. Depth frame 45 * 45cm and more - jumper for contacts No. 2 and No. 3.
  • 2. Basket coil - 30 kΩ resistor.
  • 3. Standard mono coil with a diameter of up to 40cm - nothing is installed (Only the end of the winding to contacts No. 1 and No. 4).
For the manufacture of the coil, it is recommended to use a winding wire with a diameter of 0.7-0.8 mm or a stranded wire 0.75 mm2 (18, 19 AWG)
  • Standard coil with a diameter of 20cm - 29 turns
  • Standard coil diameter 28cm - 25 turns
  • Deep frame (square) 60*60cm - 16 turns
  • Depth frame (square) 90*90cm - 13 turns
  • Depth frame (square) 120*120cm - 11 turns
  • Depth frame (square) 120*120cm - 10 turns

The inscriptions on the front panel of the metal detector are in Russian!