PICT0184

+5 Co 12 v

34

Cl . 1

R1 lOOfc

R4

lOOK

C2 . 1

-H-

14

13"

:VW-

R3 2 2 OK,

Ul

MC 1454IB TIMER

12

11

lO

—O O-

31

START

R2 4.7K

COUNTER SELECTOR CHART

PIH12	PIN13	HUMBER OF COUNTER 3TAGE3 (N>	COUNT 2”
O	O	13	8 192
O	1	lO	1024
1	O	8	256
1	1	16	6553 6

o-Q

32    -i.

-c

OUTPUT

The inputs aC pins 12 And 13 of Che MC 14415 pcogcamiiable tounter deceraine Che nurobec of counCec sCages selecCed, And Cherefore Che counC.