R1 =  10 K
R2 =  10 K
R3 = 330 ohm
R4 = 4,7 K
R5 = 2,2 K (*)
R6 = 2,2 K (*)
R7 = 330 ohm
R8 =  10 K
R9 =  10 K
R10= 2,2 K (*)
R11= 2,2 K (*)
R12= 330 ohm
R13= 100 K
R14= 4,7 K
R15= 100 ohm
R16= 2,2 K
R17=  10 ohm
R18= 100 K
R19= 100 K
R20= 100 K
R21= 100 K
R22= 100 K
R23= 100 K
R24= 100 ohm 1/2 W
R25= 4,7 K


(*) R5-R6-R10-R11 can be replaced by a resistor-net

C1 =  4,7 uF 16 V
C2 =   22 pF
C3 =   22 pF
C4 = 1000 uF 25 V
C5 =   10 uF 25 V
C6 =   10 uF 25 V
C7 =   10 uF 25 V
C8 =   47 nF
C9 =   47 nF
C10=   47 nF
C11=   47 nF
C12=  100 pF
C13=  100 pF
C14=  100 pF
C15=  100 pF


D1 =  ZENER 5,1 V
D2 =  ZENER 5,1 V
D3 =  BAT 43 OR ANY DIODE SCHOTTKY LOW POWER
D4 =  ZENER 5,1 V
D5 =  ZENER 5,1 V
D6 =  1N4148
D7 =  1N4148
D8 =  LED 3mm
D9 =  LED 3mm
D10=  ZENER 5,1 V

T1 =  TRANSISOR PNP TYPE BC 557 OR EQUIVALENT
IC1=  LM 339
IC2=  SN74HC14  DON'T REPLACE WITH SN74LS14
IC3=  CD4016 OR CD4066 USE ONLY SERIES CMOS 4000
IC4=  CD4016 OR CD4066 USE ONLY SERIES CMOS 4000
IC5=  78L08
IC6=  78L05