Scientific Development Corporation Minivac 601, Знакомство с устройством, Страница: 23 / 36

EXPERIMENT II
I
Connect the rotary switch to
operate lights 5 and
6
when the
pointer knob points to numbers
1
and
2
re sp e c tiv e ly.
I/
The program for this c irc u it is:
MANUAL OPERATION OF ROTARY SWITCH
i
|
| his experim ent demonstrates basic manual
- • operation of the rotary sw itch .
6+/D16
D 2/6A
6
- /
6
B
D 1/5A
5B/6B
2 / Turn power O N and rotate the
pointer to number 1. Lighi
4
)
S)
pointer to number l . Light 5
comes O N and remains O N
as long as the pointer
points at number
1
.
Rotate the pointer to number 2 .
Light 5 goes O F F and light
6
comes
O N . N o tice that light 5 goes O FF before
light
6
comes O N . This shows that the
rotary switch is designed to disconnect
the arm from one contact before making
connection w ith the next co n tact.
The switch operation is described as
"b re a k -b e fo re -m a k e ," and thus is
sim ilar to the pushbutton sw itches.
Rotate the pointer knob
back and forth a few
times between numbers
1
and
2
.
Connect several other lights
to the rotary switch term inals
to demonstrate that an e le c tric a l
connection is made from D16 to each
te rm in a l. More than one terminal
may be connected to each lig h t.
Try this yo u rself.
Connect the rotary sw itch to operate
one or more re la y s . Control a light
w ith each re la y w hich is e n erg ized .
6
+
The c irc u it looks like th is:
D16 ’
5A
V I
v z
6A
6 -
©
SB
When m anually operated, the rotary \
switch is used to send information to the
computer from the operator. Thus, by
positioning the pointer knob, it is
possible to communicate information to
the computer. The rotary switch w ill be ,
used for this purpose in later experim ents. /
11