Basic HTML Version
Left Flipper Circuit
:- FLIPTRO-NIC -II BOAR-D - - - - - - - ;
, Playfield
Flipper Coil Circuits
Right Flipper Circuit
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, FLiPTRONIC II BOARD
Playfield
Power
Holdin
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__ ~P~o~w~e~r
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Holdin
J906
3 · 1-----!.:::=~~
Lower Left
End-of·Stroke
Switch
'_"'_"""~=-....J
J906
5H-.....::=~9
Upper Left
End-of-Stroke
SWitch
6
4
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,Black-Green
Lower Right
End-of-Stroke
'Orange
Switch
,Black-Violet
Upper Right
End-of-Stroke
Switch
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'Orange
1
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Flipper End-of-Stroke Switches
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F1 Lower Right Flipper 'FLIPTRONIC II
F5 Upper Right Flipper ',BOARD
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J906 ,
1 ' Black-Green
3 '
Black-Blue
F3 Lower Left Flipper
F7 Upper Left Ripper
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, FLiPTRONIC II BOARD
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+5V
+12V
, Orange
'74HCT244
,
Dedicated Input
: Orange
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The flipper switch circuits operate similar to the dedicated switch circuit. The circuits are active low and tied to
ground through the switch.
When a switch closes the row side (dedicated input) of the circuit activates. The·
+.
input to the LM339 drops below
+5V therefore its output is low. Since the row (dedicated input) circuit is tied directly to ground through the switch,
the switch is considered closed by the microprocessor. When the switch opens, the
.+.
input to the LM339 is above
'.~/
+5V, its output is high and the row (dedicated input) is inactive.
Twilight Zone 3-26