Basic HTML Version
: Jl02
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POWER DRIVC::R BOARD
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Power
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The microprocessor toggles the output of the 74LS374. When point ·A" is low, point "B", the collector of the 2N5401
transistor, is high. A high at point "B" causes point "C", the collector of the TIP102 transistor and point
"0",
the emitter of the TIP36C transistor, to drop low. When point
"0"
is low, the coil is grounded through
the transistor and turns on. The coil shuts off when point ••~' toggles high.
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Fl02
J133
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~,_.__.,.._.I--'-+--_""---O
O-----;~I-. .;..:
_Re_d-_B_'o_w_n-'
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HIGH POWER SOLENOID CIRCUIT
r - - - -------------
- -~~--- ~
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Drive
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+50V
10K
lW
~D
Violet-XXX
LOW POWER SOLENOID CIRCUIT
-- - - ---------- - l
1 --0
vee
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• I
COIL
LSj74
8-f
l02~
4.7K
A
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470
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POWER DRIVE~ BOARD
COIL
Red-Block
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L _:~
w~.c_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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The microprocessor toggles the output of the 74LS374. When point "A" is low, point "B", the collector
at
the 2N5401 transistor, is high. A high at point "B" turns on the TIP102 transistor and causes point
"c"
to
drop low. When paint "C" is low the coil is grounded through the transistor and turns on. The coil shuts
off when point "A" toggles high.
5 ....__
1
5
1 - - _>-----1
3-8