You can download also  Instrucitons "BuildInstruction4.pdf" from the repositary Build Instruction v.4

We construct two versions of the devise. The firsto version include LCD and here is schematics

Here is schematics of the device with LED Display. We pay attention to this version becouse LED Display is more usable.  You can consruct the device with LCD Display the same way. The only difference is size and situation of Display.

We use ready box (housing) G1168G Gainta. You only need to make a slot for the LED or LCD display.

• 1       Controller
• 2       24 bit ADC shields
• 3       8 digits LED shields
• 5       Push button
• 6       Box for device
• 7       DB25F connector
• 12     0.1 uF 16 V capacitors
• 13     PCB for GND and VCC connections
• 14     3300 uF 16 V low ESR capacitor

The sensor board can be made from plastic breadboard or tray. You need only drill. Here are samples on a breadboard and pllywood.

         Four sensors (1) are attached with screws 2 with washers to the plate, and four finger plates (6)  are attached to the sensors with screws 3. All wires are soldered to the terminals 4. Cable 5 goes to device. The bottom plate is screwed to the four screw racks.