Quantity  Name of the part        Value       Symbol name on circuit diagram
3         push button switch                  S1;S2;S3
1         LCD module Hitachi                  IC3
1         LCD backlight                       LD1 (contained in LCD module)
1         Diode                   1N4148      D1
1         Diode                   1N4007      D2
1         Transistor              BC547       TR1
1         Pot.meter               20k         VR1
1         Resistor                100         R3
11        Resistor                100k        R4;R5;R6;R7;R8;R9;R10;R11;R12;R17;R18
2         Resistor                1k          R1;R2
1         Resistor                15k         R13
1         Resistor                6k8         R14
1         Resistor                68k         R15
1         Resistor                33k         R16
2         Electrolytic capacitor  220µ        C12;C13
3         Capacitor               100n        C3;C11;C14
2         Capacitor               33p         C1;C2
1         Xrystal                 4MHz        X1
1         Voltage regulator       LP2950 5V   IC1
1         Microprocessor          PIC16F873   IC2