Star Tech Journal

S*TJ DECEMBER 1981 11
TWO COIN/1 PLAY CIRCUIT REDESIGN
INPUT
OUTPUT
R.SW.
2.
,------------ ---7
I.C.
(7473)
:
I
01
n - - - - - ----<
1
I
I
I
CLK
Q
Q 1---..-vv1~c...,
CLK
C
CLR
CLR
RELAY
I
I
L ____________ _____ l
NC
C4
D---,----------------VVV\J'l--------~~J
NOT
USED
1
:
C3.
I _____________ - --1
R2.
I_
+5V
FROM
,,1~M~i~;m.
PARTS LIST
C1,C3,-0.1 Mfd. C2-1.0Mfd. C4-100 Mfd./16V.
R1 - 4.7 K!l, R2 - 10K.n...
01 - 2N3055 or EQV.
RELAY - D.P.D.T.5V. MINIATURE (RADIO SHACK NO. 275-215 OR EQV.)
WIRING DIAGRAMS
For games with 1 coin chute
and single pole single throw
coin switch. (two wires)
COIN
SWITCH
NO
"A"
2COINS
1 PLAY
UNIT
+5V
C
GND
NC
FIG.1
For games with 1 coin chute
and single pole double throw
coin switch. (three wires)
COIN
SWITCH
TO
GAME
BOARD
NOT USED
NO
NO
"A"
C
NOT USED
REMOVE
WIRE AND
MOVETO'B'
2COINS
1 PLAY
UNIT
TO
C
~---GAME
BOARD
NC
GND
"B"
+5V
FIG.2
FOR ALL GAMES WITH TWO COIN CHUTES
COIN SW
NO.1
COIN SW
NO.2
"A"
2COINS
1 PLAY
UNIT
GND
FIG.3
NO
TO
GAME
BOARD
C
NC
"B"
("B" IF USED CONNECT AS-IN FIG. 2)