Basic HTML Version
High Power Solenoid Circuit
POWER DRIVER BOARD
DRIVE
vee
+50V
2.7KO
J130
i
!
Ployfield or
!
Backbox Coil
Violet-XXX
680
LS374
+
F105
Red-Brown
Jl02
Fl12
J107
lOOl'f
50V
POWER
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---------------------- --------------------------------------~
The microprocessor toggles the output of the 74LS374. When point "A" drops low, point "S" the collector of the 2N5401 transistor is
high. A high at point "S" causes point "C" the collector of the TIP102 transistor, and point
"0"
the emitter of the TIP36 transistor to
drop low. When point
"0"
is low the coil is grounded through the transistor and the coil turns On. The coil shuts Off when point "A"
toggles high.
Low Power Solenoid Circuit
Ployfield or
Bockbox Coil
POWER DRIVER BOARD
DRIVE
vce
J113
A
4700
2N5401 B
680
LS374
2.7KO
Jl02
Fl12
+
+50V
J127
Brown
-xxx
Fl04
Red-Black
Jl07
lOOl"f
50V
POWER
The microprocessor toggles the output of the 74LS374. When point "A" is low, point "S" the collector of the 2N5401 transistor is
driven high. A high at point "S" turns On the TIP102 transistor, and causes point "C" to drop low. When point "C" is low the coil is
grounded through the transistor and the coil turns On. The coil shuts Off when polnt "A" toggles high.
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