Main component list:

 IC1= PIC16L877F 4MhZ PLCC + PLCC socket 44pins  JP1= NOKIA 3310 LCD (LPH7779)  RN1= resistor-array 8x 4k7  LED U$1= red, PROGRAM
 IC2= EEPROM 24LC256 DIL + socket  JP2= 4pin SIL connector (Key-rows)  Q1= 4MhZ Quartz  LED U$2= yellow, SPECIAL
 IC3= 74HC148D (SMD)  JP3= 8pin SIL connector (Key-columns)  D1= IR LED  LED U$3..5= green, ADDR2..0
 Key-matrix (max. 4columns x 8rows)  JP4= TSOP34836 IR receiver  T1= BC639  

Main interconnections:
         
 

PLCC PIC

IR

   
RC0, pin 16 IR_EN_RX
RC1, pin 18 TX
RC2, pin 19 RX
   
PLCC PIC ic EEPROM
   
SDA, pin 25 SDA, pin 5
SCL, pin 20 SCL, pin 6
   
PLCC PIC LEDs
   
RA0, pin 3 red, PROGRAM
RA1, pin 4 yell, SPECIAL
RA2, pin 5 green, ADDR0
RA3, pin 6 green, ADDR1
RA5, pin  8 green, ADDR2
 

PLCC PIC

 NOKIA LCD
   
  1= +2.6v
RD6, pin 32 2= sclk
RD7 pin 33 3= sda
RD0, pin 21 4= d/!c
RD3, pin 24 5= !cs
  6= gnd
  7=Vout
RD1, pin 22 8= !res
   
   
  TSOP34836
   
  pin1, out
  pin2,GND
  pin3, +V
   

PLCC PIC

HC148 encoder

key-matrix

     
RB4, pin 41   COL0
RB5, pin 42   COL1
RB6, pin 43   COL2
RB7, pin 44   COL3
INT RB0, pin 36, RKP GS, pin 14  
RB1, pin 37, RMX0 AO, pin 9  
RB2, pin 38, RMX1 A1, pin 7  
RB3, pin 39, RMX2 A2, pin 6  
  0, pin 10 ROW0
  1, pin 11 ROW1
  2, pin 12 ROW2
  3, pin 13 ROW3
  4, pin 1 ROW4
  5, pin 2 ROW5
  6, pin 3 ROW6
  7, pin 4 ROW7

Back to the project