Star Tech Journal

*
S T J FEBRUARY 1982 7
GO'I 'J'I JTEB
Cal's
Coin
College
POP* BUMPER* SCORING* SWITCH
FIGURE 1
The pop bumper scoring
switches on Gottlieb's pinball
game, "Black Hole", have
been changed to eliminate the
mechanical wear on the switch
caused by the insulating yoke
slamming the scoring switch
closed when the pop bumper
is activated. Gottlieb will now
use the configuration shown in
Figure 1 on all of its future
games. A contact of the
switch now rests atop the
insulating yoke, keeping the
switch open. When the pop
bumper is activated, the
switch closes by just the
spring tension of the contact,
allowing for a more reliable
switch.
School for
Electronic Games
Electronic pinballs -
one week, video games
- one week, by
SCHEMATICS! Our
11th year! CAL'S
COIN COLLEGE,
P.O. Box 810, Nicoma
Park, OK 7 3066.
Phone: 405-769-5343
YOKE
COURTESY OF GOTTUEB'S TECHNICAL NEWSLETTER "ON TARGET"
GREMLIN/SEGA'S
DIGITAL* TECH *TEST* (PART 2)
5) What is the level of Q after the rising edge of the clock pulse occurs? Of Q?
_f1_
6) What are the levels of Q and Q in the following circuit?
SERVICE
SWITCH
0=
NC
GND
NO
Q=
7) What are the levels of the outputs on the 15th clock pulse?
PART 1 ANSWERS
1. a= 1
2 . 01=0
02=1
3. Q=O
4 . Q=O
BINARY COUNTER
_n_n__
----t>
CLK
Q
Az
Q
B•
+5
Q-
c~
CLR
Q -
D=
(PART 2 ANSWERS NEXT MONTH)