The board is designed for self-assembly of a Fortune M2 or Fortune M3 metal detector Features of the latest version: - Battery protection is redesigned to minimize voltage drop - Provides for electronic power off by a button. Consumption current is reduced to zero when disconnected. - Filter capacitors in power supply circuits are added. - Both ceramic smd capacitors and CL21 metal-film lead capacitors can be used in the filters. - Ratings of battery measuring circuit corrected - smoother adjustment - Board is designed for KRADEX Z80 case - display WG12864B Features of Fortune M3/M2 rev.3 board assembly - When assembling the M2 version, install the MCP41010 (DA100) chip and the JC3 jumper. Do not install the DA6 chip. - When assembling the M3 version, install the MCP42010 (DA6) chip, do not install the JC3 jumper. Do not install the DA100 chip. - Resistor R22 and capacitor C19 are in the same position and need to be soldered one on top of the other. - You should not solder all regulators at the same time, you need to solder either LD1117 or NCP5501 - The board has six buttons, if you do not need an electronic switch, you must install five buttons as marked at the bottom of the board and install two jumpers on the board - JC1 and JC2. In this case, the elements of the electronic switch are not installed. - The assembled board is fastened to the rear wall of the enclosure using 18 mm high metal stands I can send a list of components and a circuit diagram to your email on request