A02 B0 18A13 B1 17A24 B2 16A35 B3 15A46 B4 14A57 B5 13A68 B6 12A79 B7 11

CE19AB/BA1

U1

74LS245

CLK14E13

MR15 CO 12

Q0 3Q1 2Q2 4Q3 7Q4 10Q5 1Q6 5Q7 6Q8 9Q9 11

U2

4017

R4

DC 7

Q 3

GND

1VC

C8

TR2 TH 6

CV5

U3

555

A02 B0 18A13 B1 17A24 B2 16A35 B3 15A46 B4 14A57 B5 13A68 B6 12A79 B7 11

CE19AB/BA1

U4

74LS245

+88.8

R1330R

D1LED-BLUE

RV1100k

R210k

C14.7u

C2100n

BAT112V